Schluter DHERS/BW Installation guide

Schluter DHERS/BW Installation guide
Schluter®-DITRA-HEAT Installation Handbook 2015
5,5 mm
Electric Floor Warming System
with Integrated Uncoupling Technology Schluter®-DITRA-HEAT
Electric Floor Warming System with Integrated Uncoupling Technology
Ceramic and stone tiles are the ideal surface coverings because they are durable, easy to maintain, and hygienic. However
two common barriers to the selection of tile as a floor covering are concerns about cracking and the perception that tiles
are cold.
Floor warming systems are a growing trend in tile applications, but none address concerns about cracking. A viable
installation system must address the magnified fluctuations in temperature that contribute to increased shear stresses
between the substrate and the tile covering. Schluter®-DITRA-HEAT integrates customizable, comfortable electric floor
warming with the functions associated with DITRA: uncoupling, waterproofing, vapor management and support to ensure a
long lasting installation.
DITRA-HEAT combines the flexibility of loose heating cables with the ease of installation of mat systems. Cables can be
placed wherever heat is desired, without creating height differences in the floor. Self-leveling compounds are not required
to encapsulate the cables, significantly reducing installation time and effort compared to uncoupling membranes over other
electric floor warming systems.
Uncoupling
Tile has been successfully installed for thousands of years by incorporating an uncoupling layer,
or forgiving shear interface, within the tile assembly. DITRA-HEAT provides uncoupling through
its geometric configuration, which allows for in-plane movement that effectively neutralizes the
differential movement stresses between the substrate and the tile, thus eliminating the major cause
of cracking and delaminating of the tiled surface.
Waterproofing
DITRA-HEAT provides reliable waterproofing. Its polypropylene composition protects the substrate
from moisture penetration, which is particularly important in today’s building environment where
most substrates are moisture sensitive.
Vapor Management
The free space on the underside of DITRA-HEAT provides a route for excess moisture and vapor
to escape from the substrate that could otherwise cause damage to the tile covering above.
Thus, DITRA-HEAT effectively manages moisture beneath the tile covering.
Support/Load Distribution
When placed on a solid foundation, columns or pillars can support tremendous loads. The
same physical principle applies to DITRA-HEAT installations. Column-like mortar structures are
formed in and between the studs on the surface of the matting. Loads are transferred from the
tile covering through these column-like mortar structures to the substrate. Since DITRA-HEAT is
virtually incompressible within the tile assembly, the advantages of uncoupling are achieved without
sacrificing point load distribution capabilities.
Legend
Essential
Significant
Helpful
Schluter®-Systems’ written installation instructions shall have
precedence over referenced industry standard guidelines and
installation procedures insofar as referenced information may contain
overlapping or conflicting requirements. Type, thickness, and format
of the ceramic or stone tile surface covering must be suitable for the
intended application.
CONTENTS
WOOD
CONCRETE
GYPSUM
WATERPROOFING
MOVEMENT JOINTS
WOOD UNDERLAYMENT
INSTALLATION
THIN-SET FACTS
TESTING & CERTIFICATIONS
NATURAL STONE
PRODUCT & ORDERING INFO
HEATING CABLE TESTS LOG
WARRANTY
4
6
7
7
8
9
10
11
14
15
Floors,
Floors,
Floors,
Floors,
Interior
Interior
Interior
Interior
–
–
–
–
16, 19.2, & 24-inch o.c. joist spacing
Natural Stone Tile
Existing Vinyl
Structural Plank Subfloor
Floors, Interior – Ceramic or Stone Tile
Floors, Interior – Ceramic or Stone Tile
Floors, Interior – Ceramic or Stone Tile
Placement guidelines and descriptions
Installation guidelines
Installation instructions
21 Discussion of thin-set mortar types to be used with Schluter®-DITRA-HEAT
22 Products evaluation
23 Discussion of natural stone and
single-layer wood subfloors
24
26 27
Heating cables must be installed by a qualified person
in accordance with this handbook and with the National
Electric Code (USA) or Canadian Electric Code Part I (CAN)
as applicable. All electrical connections must be made by a
qualified electrician, according to the electrical and building
codes effective in your region.
WOOD
Every substrate presents unique challenges
All wood materials, including OSB, plywood, and framing members, are subject to expansion, contraction, bending, and deflection as a
result of changes in moisture content and loading. Further, these deformations fluctuate over the life of the building structure.
DITRA-HEAT’s uncoupling function protects the ceramic or stone tile covering from the aforementioned deformations by
neutralizing the differential movement stresses between the wood structure and the tile, thus eliminating the major cause
of cracking and delaminating of the tiled surface. Therefore, DITRA-HEAT can replace a second layer of plywood in most
applications.
Since wood structures are sensitive to moisture, DITRA-HEAT’s waterproofing function adds an essential element to the
flooring assembly by providing simple, effective, and permanent moisture protection.
Wood continually absorbs and releases moisture. The free space beneath the DITRA-HEAT membrane allows the wood to
breathe and provides a route for any residual moisture in the wood substrate to escape.
Since DITRA-HEAT is virtually incompressible within the tile assembly, the advantages of uncoupling are achieved without
sacrificing point load distribution capabilities.
By addressing all of the challenges associated with today’s fast, lightweight construction methods, DITRA-HEAT provides a durable
installation system for ceramic and stone tile over wood substrates.
DITRA-HEAT combines the flexibility of loose heating cables with the ease of installation of mat systems. Cables can be placed wherever
heat is desired, without creating height differences in the floor. Self-leveling compounds are not required to encapsulate the cables,
significantly reducing installation time and effort compared to uncoupling membranes over other electric floor warming systems.
Floors, Interior - Ceramic or Porcelain Tile
DH-W16-T-15
Ceramic or porcelain tile
Unmodified thin-set mortar
DITRA-HEAT
uncoupling membrane
and heating cables
Latex p.c. mortar
Single layer of plywood
or OSB
Joists, I-joists, or
trusses
16" (406 mm) o.c. joist spacing, single layer OSB
or plywood subfloor
Areas of Application
over any even and structurally sound OSB or
plywood subfloor with 16" (406 mm) o.c. joist
spacing
interior dry or wet areas
Setting and Grouting Materials
latex portland cement (p.c.) mortar –
ANSI A118.11
unmodified thin-set mortar – ANSI A118.1
grout – ANSI A118.3, A118.6, A118.7, A118.8
Limitations
minimum 2" x 2" (50 mm x 50 mm) tile
for natural stone, see detail DH-W-S (page 6)
and natural stone discussion (page 23)
Setting and Grouting Specifications
tile – ANSI A108.5
grout – ANSI A108.6, A108.9, A108.10
Requirements
maximum spacing of joists, I-joists, or floor
trusses is 16" (406 mm) o.c.
minimum subfloor thickness – 19/32", 5/8"
nom. (16 mm) tongue-and-groove with 1/8"
(3 mm) gap between sheets.
Substrate Preparation
verify that subfloor panels are properly
fastened to framing members.
any leveling of the subfloor must be done
prior to installing DITRA-HEAT.
Movement Joints
DITRA-HEAT does not eliminate the need for
movement joints, including perimeter joints,
within the tiled surface. Movement joints must
be installed in accordance with industry
standards and norms; see page 11 of this
Handbook, TCNA EJ171, and TTMAC 301 MJ.
4
WOOD — Floors, Interior - Ceramic or Porcelain Tile
Other Considerations
tightly butted and/or tented plywood or OSB
seams must be addressed prior to installing
DITRA-HEAT.
vapor barrier on crawl space floors according
to regional building codes.
where a waterproof floor is required, all
DITRA-HEAT seams and floor/wall transitions
must be sealed with KERDI-BAND using
unmodified thin-set mortar; see page 10. DH-W19-T-15
Ceramic or porcelain tile
Unmodified thin-set mortar
DITRA-HEAT
uncoupling membrane
and heating cables
Latex p.c. mortar
Single layer of plywood
or OSB
Joists, I-joists, or
trusses
19.2" (488 mm) o.c. joist spacing, single layer OSB
or plywood subfloor
Areas of Application
over any even and structurally sound OSB or
plywood subfloor with 19.2" (488 mm) o.c.
joist spacing
interior dry or wet areas
Limitations
minimum 2" x 2" (50 mm x 50 mm) tile
for natural stone, see detail DH-W-S (page 6)
and natural stone discussion (page 23)
Requirements
maximum spacing of joists, I-joists, or floor
trusses is 19.2" (488 mm) o.c.
minimum subfloor thickness – 23/32",
3/4" nom. (19 mm) tongue-and-groove with
1/8" (3 mm) gap between sheets.
Substrate Preparation
verify that subfloor panels are properly
fastened to framing members.
any leveling of the subfloor must be done
prior to installing DITRA-HEAT.
DH-W24-T-15
Ceramic or porcelain tile
Movement Joints
DITRA-HEAT does not eliminate the need for
movement joints, including perimeter joints,
within the tiled surface. Movement joints
must be installed in accordance with industry
standards and norms; see page 11 of this
Handbook, TCNA EJ171, and TTMAC 301 MJ.
Setting and Grouting Materials
latex portland cement (p.c.) mortar –
ANSI A118.11
unmodified thin-set mortar – ANSI A118.1
grout – ANSI A118.3, A118.6, A118.7, A118.8
Setting and Grouting Specifications
tile – ANSI A108.5
grout – ANSI A108.6, A108.9, A108.10
Other Considerations
tightly butted and/or tented plywood or OSB
seams must be addressed prior to installing
DITRA-HEAT.
vapor barrier on crawl space floors according
to regional building codes.
where a waterproof floor is required, all
DITRA-HEAT seams and floor/wall transitions
must be sealed with KERDI-BAND using
unmodified thin-set mortar; see page 10.
24" (610 mm) o.c. joist spacing, double layer OSB
or plywood subfloor
Unmodified thin-set mortar
Latex p.c. mortar
Areas of Application
over any even and structurally sound double
layer OSB or plywood floor
interior dry or wet areas
Double layer of plywood
or OSB
Limitations
minimum 2" x 2" (50 mm x 50 mm) tile
DITRA-HEAT
uncoupling membrane
and heating cables
I-joists or
trusses
Requirements
maximum spacing of joists, I-joists, or floor
trusses is 24" (610 mm) o.c.
double layer wood floor consisting of:
• minimum subfloor thickness – 23/32",
3/4" nom. (19 mm) tongue-and-groove
• minimum underlayment thickness –
11/32", 3/8" nom. (10 mm)
Substrate preparation
verify that subfloor panels are properly
fastened to framing members.
underlayment – minimum 11/32", 3/8" nom.
(10 mm)-thick Exposure 1, plugged-face
plywood or OSB with 1/8" (3 mm) gap
between sheets; see page 14 for
underlayment installation guidelines.
any leveling of the subfloor must be done
prior to installing DITRA-HEAT.
Movement Joints
DITRA-HEAT does not eliminate the need for
movement joints, including perimeter joints,
within the tiled surface. Movement joints must
be installed in accordance with industry
standards and norms; see page 11 of this
Handbook, TCNA EJ171, and TTMAC 301 MJ.
Setting and Grouting Materials
latex portland cement (p.c.) mortar –
ANSI A118.11
unmodified thin-set mortar – ANSI A118.1
grout – ANSI A118.3, A118.6, A118.7, A118.8
Setting and Grouting Specifications
tile – ANSI A108.5
grout – ANSI A108.6, A108.9, A108.10
Other Considerations
tightly butted and/or tented plywood or OSB
seams must be addressed prior to installing
DITRA-HEAT.
vapor barrier on crawl space floors according
to regional building codes.
where a waterproof floor is required, all
DITRA-HEAT seams and floor/wall transitions
must be sealed with KERDI-BAND using
unmodified thin-set mortar; see page 10.
WOOD — Floors, Interior - Ceramic or Porcelain Tile
5
Floors, Interior - Natural Stone Tile
DH-W-S-15
Natural stone tile
Unmodified thin-set mortar
DITRA-HEAT
uncoupling membrane
and heating cables
Latex p.c. mortar
Double layer of plywood
or OSB
Joists, I-joists, or
trusses
Double layer of OSB or Plywood subfloor
Areas of Application
over any even and structurally sound double
layer OSB or plywood floor
interior dry or wet areas
Limitations
requires double layer wood floor regardless
of joist spacing
minimum 2" x 2" (50 mm x 50 mm) tile
Requirements
maximum spacing of joists, I-joists, or floor
trusses is 24" (610 mm) o.c.
double layer wood floor consisting of:
• minimum subfloor thickness – 23/32",
3/4" nom. (19 mm) tongue-and-groove
• minimum underlayment thickness –
11/32", 3/8" nom. (10 mm)
Substrate Preparation
verify that subfloor panels are properly
fastened to framing members.
underlayment – minimum 11/32", 3/8" nom.
(10 mm)-thick Exposure 1, plugged-face
plywood or OSB with 1/8" (3 mm) gap
between sheets; see page 14 for
underlayment installation guidelines.
any leveling of the subfloor must be done
prior to installing DITRA-HEAT.
6
WOOD — Floors, Interior
Movement Joints
DITRA-HEAT does not eliminate the need for
movement joints, including perimeter joints,
within the tiled surface. Movement joints must
be installed in accordance with industry
standards and norms; see page 11 of this
Handbook, TCNA EJ171, and TTMAC 301 MJ.
Setting and Grouting Materials
latex portland cement (p.c.) mortar –
ANSI A118.11
unmodified thin-set mortar – ANSI A118.1
grout – ANSI A118.3, A118.6, A118.7, A118.8
Setting and Grouting Specifications
tile – ANSI A108.5
grout – ANSI A108.6, A108.9, A108.10
Other Considerations
certain moisture-sensitive stones, e.g., green
marble, or resin-backed tiles may require
special setting materials. Consult stone
supplier and Schluter®-Systems for more
information.
tightly butted and/or tented plywood or OSB
seams must be addressed prior to installing
DITRA-HEAT.
vapor barrier on crawl space floors according
to regional building codes.
where a waterproof floor is required, all
DITRA-HEAT seams and floor/wall transitions
must be sealed with KERDI-BAND using
unmodified thin-set mortar; see page 10.
Floors, Interior - Existing Vinyl Floors
DH-V-T-15
Tile or wood base
Ceramic or stone tile
RONDEC
DILEX-EKE
Unmodified thin-set mortar
KERDI-BAND
DITRA-HEAT
uncoupling membrane
and heating cables
Fast-setting
latex p.c. mortar
Existing vinyl
Plywood or OSB
Joists, I-joists, or
trusses
Areas of Application
over any even and structurally sound
substrate with existing vinyl flooring
interior dry or wet areas
Limitations
minimum 2" x 2" (50 mm x 50 mm) tile
cushioned vinyl unacceptable
perimeter bonded vinyl flooring unacceptable
multiple layers of vinyl unacceptable
Requirements
for wood substrates, subfloor/underlayment
configuration according to detail DH-W16-T,
DH-W19-T, DH-W24-T, or DH-W-S
Substrate Preparation
ensure that the structure beneath the vinyl is
sound and adequate
ensure that vinyl is well adhered
remove any wax and clean vinyl
for wood substrates, nail off floor with ring
shank flooring nails every 4" (102 mm) o.c.
– fasteners must pass through entire
thickness of assembly with minimal
penetration into joists
any leveling of the subfloor must be done
prior to installing DITRA-HEAT.
Movement Joints
DITRA-HEAT does not eliminate the need for
movement joints, including perimeter joints,
within the tiled surface. Movement joints must
be installed in accordance with industry
standards and norms; see page 11 of this
Handbook, TCNA EJ171, and TTMAC 301 MJ.
Setting and Grouting Materials
Fast-setting latex portland cement (p.c.)
mortar – ANSI A118.4 or A118.15
DH-SP-TS-15
unmodified thin-set mortar – ANSI A118.1
grout – ANSI A118.3, A118.6, A118.7, A118.8
Setting and Grouting Specifications
tile – ANSI A108.5
grout – ANSI A108.6, A108.9, A108.10
Other Considerations
DITRA-HEAT is adhered to the vinyl flooring
using a fast-setting latex-portland cement
mortar suitable for bonding to vinyl. As an
alternative, a suitable cement-based
embossing leveler or an appropriate latexmodified thin-set mortar can be used to skim
coat the vinyl to provide a bonding surface.
When skim coat is cured, DITRA-HEAT is
adhered to the skim coat using an unmodified
thin-set mortar. See page 21 for discussion
on
latex-modified
thin-set
mortars
sandwiched between two impervious layers.
seaming DITRA-HEAT, including floor/wall
connections, with KERDI-BAND may be
appropriate in cases where a break in the
water line of an ice maker or dishwasher can
damage pre-existing moisture-sensitive
substrates and underlayments. KERDI-BAND
floor/wall connections are just as easily
concealed with wood base as with tile.
KERDI-BAND floor/wall connections in
dishwasher alcoves are parged with thin-set
mortar; see page 10.
vapor barrier on crawl space floors according
to regional building codes.
certain moisture-sensitive stones, e.g., green
marble, or resin-backed tiles may require
special setting materials. Consult stone
supplier and Schluter®-Systems for more
information.
Floors, Interior - Structural Plank Subfloor
Ceramic or stone tile
Unmodified thin-set mortar
DITRA-HEAT
uncoupling membrane
and heating cables
Latex p.c. mortar
Plywood or OSB
underlayment
Structural plank
subfloor
Joists
Areas of Application
over structural plank subfloors
interior dry or wet areas
Limitations
minimum 2" x 2" (50 mm x 50 mm) tile
Requirements
maximum spacing of joists is 24" (610 mm) o.c.
double layer wood floor consisting of:
• minimum structural plank subfloor
thickness – 3/4" (19 mm)
• minimum underlayment thickness –
15/32", 1/2" nom. (13 mm)
Substrate Preparation
verify that subfloor planks are properly
fastened to framing members.
underlayment – minimum 15/32", 1/2" nom.
(13 mm)-thick Exposure 1, plugged-face
plywood or OSB with 1/8" (3 mm) gap
between sheets; see page 14 for
underlayment installation guidelines.
any leveling of the subfloor must be done
prior to installing DITRA-HEAT.
Movement Joints
DITRA-HEAT does not eliminate the need for
movement joints, including perimeter joints,
within the tiled surface. Movement joints must
be installed in accordance with industry
standards and norms; see page 11 of this
Handbook, TCNA EJ171, and TTMAC 301 MJ.
Setting and Grouting Materials
latex portland cement (p.c.) mortar –
ANSI A118.11
unmodified thin-set mortar – ANSI A118.1
grout – ANSI A118.3, A118.6, A118.7, A118.8
Setting and Grouting Specifications
tile – ANSI A108.5
grout – ANSI A108.6, A108.9, A108.10
Other Considerations
vapor barrier on crawl space floors according
to regional building codes.
where a waterproof floor is required, all
DITRA-HEAT seams and floor/wall transitions
must be sealed with KERDI-BAND using
unmodified thin-set mortar; see page 10.
certain moisture-sensitive stones, e.g., green
marble, or resin-backed tiles may require
special setting materials. Consult stone
supplier and Schluter®-Systems for more
information.
WOOD — Floors, Interior
7
CONCRETE
Every substrate presents unique challenges
There are various challenges associated with the installation of hard surface coverings on concrete substrates.
To begin, the coefficient of thermal expansion of concrete is close to twice that of ceramic tile. Additionally, tile contractors are often expected
to install tile over young concrete (concrete cured less than 28 days). However, rigid surface coverings installed over young concrete are
susceptible to damage as a result of shrinkage during curing. Pre-stressed/post-tensioned concrete slabs are also commonplace in today’s
construction environment. Although pre-stressing is used to help control deflections in concrete structures, these slabs are still subject to
deformations caused by changes in moisture, temperature, and loading. Many concrete slabs on or below grade are subject to moisture
migration, which can be problematic. Furthermore, these structures experience the same deformations as stated above.
DITRA-HEAT’s uncoupling function protects the ceramic or stone tile covering by neutralizing the differential movement stresses
between the concrete substrate and the tile, thus eliminating the major cause of cracking and delaminating of the tiled surface.
DITRA-HEAT’s waterproofing ability not only protects the substrate from harmful substances, it also slows the drying of fresh
concrete, which reduces the chances of cracking and curling of the slab.
The configuration of the DITRA-HEAT matting provides free space to accommodate vapor emissions from the concrete slab.
This allows the installation of DITRA-HEAT and the tile covering as soon as the slab can be walked upon. Vapor management
is also essential for slabs subject to moisture migration.
Since DITRA-HEAT is virtually incompressible within the tile assembly, the advantages of uncoupling are achieved without
sacrificing point load distribution capabilities.
By addressing all of the challenges associated with today’s fast construction methods, DITRA-HEAT provides a durable installation system for
ceramic and stone tile over concrete substrates.
DITRA-HEAT combines the flexibility of loose heating cables with the ease of installation of mat systems. Cables can be placed wherever heat
is desired, without creating height differences in the floor. Self-leveling compounds are not required to encapsulate the cables, significantly
reducing installation time and effort compared to uncoupling membranes over other electric floor warming systems.
Floors, Interior - Ceramic or Stone Tile
DH-C-TS-15
Ceramic or stone tile
Unmodified thin-set mortar
DITRA-HEAT
uncoupling membrane
and heating cables
Unmodified
thin-set mortar
Concrete
Concrete subfloor
Areas of Application
over any structurally sound and even
concrete subfloor
young concrete (concrete cured less than 28 days)
on or below grade concrete subject to
moisture migration
post-tensioned or pre-stressed concrete
cracked concrete
Limitations
minimum 2" x 2" (50 mm x 50 mm) tile
concrete slabs subject to moisture migration
must have all seams in DITRA-HEAT sealed
with KERDI-BAND using unmodified thinset mortar.
any cracks in concrete subfloor must exhibit
in-plane movement only; thin-set tile
assemblies, including those incorporating
DITRA-HEAT,
cannot
accommodate
differential vertical displacement.
Requirements
slab to be structurally sound
slab to be free of waxy or oily films and curing
compounds (when present, mechanical
scarifying is necessary).
the installation of DITRA-HEAT and tile can
begin as soon as the slab can be walked upon.
8
CONCRETE — Floors, Interior - Ceramic or Stone Tile
Substrate Preparation
any leveling of the subfloor must be done
prior to installing DITRA-HEAT.
Movement Joints
DITRA-HEAT does not eliminate the need for
movement joints, including perimeter joints,
within the tiled surface. Movement joints must
be installed in accordance with industry
standards and norms; see page 11 of this
Handbook, TCNA EJ171, and TTMAC 301 MJ.
Setting and Grouting Materials
unmodified thin-set mortar – ANSI A118.1
grout – ANSI A118.3, A118.6, A118.7, A118.8
Setting and Grouting Specifications
tile – ANSI A108.5
grout – ANSI A108.6, A108.9, A108.10
Other Considerations
where a waterproof floor is required, all
DITRA-HEAT seams and floor/wall transitions
must be sealed with KERDI-BAND using
unmodified thin-set mortar; see page 10.
certain moisture-sensitive stones, e.g., green
marble, or resin-backed tiles may require
special setting materials. Consult stone supplier
and Schluter®-Systems for more information.
GYPSUM
Every substrate presents unique challenges
Bonding ceramic or stone tiles directly to gypsum concrete substrates is generally considered questionable or not recommended. The
challenges associated with gypsum-based underlayments include the requirement of an extended drying period before installing tile and
continued sensitivity to the reintroduction of moisture throughout the life of the installation. In addition, since the coefficient of thermal
expansion of gypsum concrete is substantially greater than that of ceramic tile, shear stresses caused by temperature fluctuations can
result in delamination or cracking of the tile covering. This is particularly important when gypsum concrete is used as a thermal mass for
radiant heated floors. With the increasing popularity of radiant heated floors, which typically utilize gypsum concrete, tile installers need a
reliable installation system to address these issues.
DITRA-HEAT’s uncoupling function protects the ceramic or stone tile covering by neutralizing the differential movement
stresses between the gypsum concrete substrate and the tile, thus eliminating the major cause of cracking and delaminating
of the tiled surface.
DITRA-HEAT’s waterproofing function prevents the reintroduction of moisture to gypsum concrete underlayments, which, if
not prevented, could significantly compromise performance of the underlayment and lead to damage of the tiled surface.
The configuration of the DITRA-HEAT matting provides free space to accommodate vapor emissions from the gypsum.
Since DITRA-HEAT is virtually incompressible within the tile assembly, the advantages of uncoupling are achieved without
sacrificing point load distribution capabilities.
By addressing all of the challenges associated with today’s fast, lightweight construction methods, DITRA-HEAT provides a durable
installation system for ceramic and stone tile over gypsum substrates.
DITRA-HEAT combines the flexibility of loose heating cables with the ease of installation of mat systems. Cables can be placed
wherever heat is desired, without creating height differences in the floor. Self-leveling compounds are not required to encapsulate the
cables, significantly reducing installation time and effort compared to uncoupling membranes over other electric floor warming systems.
DITRA-HEAT is useful even in applications where hydronic radiant-heating tubes are incorporated in gypsum concrete, as there may be
times when floor warming is desirable while radiant heating is not necessary.
Floors, Interior - Ceramic or Stone Tile
DH-G-TS-15
Gypsum concrete
Ceramic or stone tile
Areas of Application
over gypsum concrete underlayment placed
over structurally sound wood or concrete
subfloors
interior dry or wet areas
Unmodified thin-set mortar
DITRA-HEAT
uncoupling membrane
and heating cables
Unmodified
thin-set mortar
Gypsum
concrete
Limitations
minimum 2" x 2" (50 mm x 50 mm) tile
Requirements
for wood substrates, subfloor/underlayment
configuration according to detail DH-W16-T,
DH-W19-T, or DH-W24-T.
where radiant heat tubes are laid over the
subfloor, gypsum poured to a height that is
3/4" (19 mm) above the tops of the tubes is
required before installing DITRA-HEAT.
residual moisture in gypsum screed, 2.0%
(percentage by volume) or less before
installing DITRA-HEAT.
Substrate preparation
gypsum – follow manufacturer’s directions
Movement Joints
DITRA-HEAT does not eliminate the need for
movement joints, including perimeter joints,
within the tiled surface. Movement joints must
be installed in accordance with industry
standards and norms; see page 11 of this
Handbook, TCNA EJ171, and TTMAC 301 MJ.
Setting and Grouting Materials
unmodified thin-set mortar – ANSI A118.1
grout – ANSI A118.3, A118.6, A118.7, A118.8
Installation Specifications
gypsum – follow manufacturer’s directions
tile – ANSI A108.5
grout – ANSI A108.6, A108.9, A108.10
Other Considerations
since DITRA-HEAT must bond to the gypsum
concrete, follow gypsum manufacturer’s
directions regarding primers and/or special
surface preparation before installing
DITRA-HEAT.
where a waterproof floor is required, all
DITRA-HEAT seams and floor/wall transitions
must be sealed with KERDI-BAND using
unmodified thin-set mortar; see page 10.
certain moisture-sensitive stones, e.g., green
marble, or resin-backed tiles may require
special setting materials. Consult stone
supplier and Schluter®-Systems for more
information.
vapor barrier on crawl space floors according
to regional building codes.
GYPSUM — Floors, Interior - Ceramic or Stone Tile
9
WATERPROOFING
Every substrate presents unique challenges
Today’s construction methods, which include the use of lightweight, moisture-sensitive materials, such as plywood, OSB, and gypsum
concrete, have made the installation of hard surface coverings particularly challenging. If wood or gypsum concrete substrates are exposed
to moisture, the tile layer above can be damaged as a result.
Typical areas that require waterproofing include tub surrounds and showers. However, there are other commonly tiled areas that may,
through unexpected circumstances, become exposed to significant amounts of water; for example, an overflowed toilet, or ruptured
dishwasher, icemaker, or washing machine lines, which can result in flooding.
Waterproofing these floors can save an owner from replacing the tile assembly and substructure in the event of a leak.
DITRA-HEAT installations can be made waterproof with minimal effort. Since the matting is made of waterproof polypropylene, the only
extra step necessary is to seal the seams and floor/wall connections. This is easily accomplished by applying KERDI-BAND to these areas
using an unmodified thin-set mortar. The result is a waterproof installation that will not suffer damage in the event of an unexpected water
leak. KERDI-DRAIN or KERDI-LINE may be used to provide drainage in DITRA-HEAT installations.
Floors, Interior - Ceramic or Stone Tile
DH-WP-15
Tile or wood base
Ceramic or stone tile
RONDEC
DILEX-EKE
Unmodified thin-set mortar
KERDI-BAND
DITRA-HEAT
uncoupling membrane
and heating cables
Thin-set mortar
per appropriate
detail
10
Areas of Application
over any even and structurally sound
substrate where waterproofing is desired
Limitations
minimum 2" x 2" (50 mm x 50 mm) tile
Requirements
all seams in DITRA-HEAT matting and floor/
wall transitions must be sealed with
KERDI-BAND using unmodified thin-set
mortar. Note: KERDI-BAND must lap
DITRA-HEAT at seams and at floor/wall
transitions by a minimum of 2" (50 mm) in
order to maintain waterproof integrity
WATERPROOFING — Floors, Interior
Other Considerations
seaming DITRA-HEAT, including floor/wall
connections, with KERDI-BAND may be
appropriate in cases where a break in the water
line of an ice maker or dishwasher can damage
pre-existing moisture-sensitive substrates and
underlayments. KERDI-BAND floor/wall
connections are just as easily concealed with
wood base as with tile. KERDI-BAND floor/wall
connections in dishwasher alcoves are parged
with thin-set mortar.
in some applications the vertical section of
the floor/wall transition will not accept a bond
to unmodified thin-set mortar. Connections
to such elements can be achieved using
KERDI-FIX or suitable trowel-applied
waterproofing materials, such as those that
require atmospheric moisture to cure (e.g.,
urethane sealant).
KERDI-DRAIN or KERDI-LINE may be used
to provide drainage in DITRA-HEAT
applications. DITRA-HEAT is sealed to the
fleece-laminated KERDI-DRAIN bonding
flange with a section of KERDI membrane
using unmodified thin-set mortar. KERDI-FIX
is used to seal the section of KERDI to the
stainless steel KERDI-DRAIN bonding flange.
DITRA-HEAT is sealed to the KERDI
waterproofing collar on KERDI-LINE using
unmodified thin-set mortar.
MOVEMENT JOINTS
Every substrate presents unique challenges
DISCUSSION
Movement joints are an integral part of any tile assembly. The various components of a tile
assembly (tile, mortar, substrate, etc.) have unique physical characteristics that affect
their behavior. Specifically, these components will expand and contract at different
rates, according to each component’s intrinsic physical properties, with changes
in moisture, temperature, and loading (both dead and live loads). This differential
expansion/contraction of attached components results in internal stresses.
Furthermore, structures that restrain overall expansion of the tile field (walls, columns,
etc.) cause stress buildup within the system. If the aforementioned movements
are not accommodated through the use of movement joints in the tile field and at
restraining structures, the resulting stresses can cause cracking of the grout and tile
and delamination of the tile from the substrate. Thus, movement joints are an essential
component of any durable tile assembly.
SOLUTIONS
Movement joints must be incorporated within the tile field, at doorsills, and at transitions
to walls and other restraining structures to allow movement of the assembly and prevent
stresses that can damage the system. Schluter®-Systems’ prefabricated movement joint
profiles protect tile edges and prevent sound bridges and surface water penetration,
resulting in a permanent, maintenance-free installation. The family of Schluter®-DILEX
prefabricated movement profiles includes a variety of shapes, sizes, and materials to suit
different applications. Please see Schluter®-Systems’ Illustrated Price List and visit www.
schluter.com for more detailed information on DILEX movement profiles.
TECHNICAL NOTES
The Tile Council of North America (TCNA) and the Terrazzo, Tile, and Marble
Association of Canada (TTMAC) provide guidelines (EJ171 and 301MJ, respectively)
for the placement and construction of movement joints in and around the tile field.
Schluter®-Systems accepts these guidelines. However, given the increased use of larger
tiles, smaller grout joints, and lighter building materials, which are more susceptible to
movement, Schluter®-Systems recommends that movement joints within the tile field be
placed at more frequent intervals, as indicated below.
Guidelines for the placement of movement joints
Applications without heating cables: 16' - 20' (4.9 m - 6.1 m) in each direction
Applications with heating cables or exposed to direct sunlight or moisture:
12' - 16' (3.7 m - 4.9 m) in each direction
Place around the perimeter of any size floor and/or against all restraining surfaces
Fields should be as square as possible. The ratio between length and width should
not exceed 1:1.5.
MOVEMENT JOINTS
11
Typical movement joint applications
1 Schluter®-DILEX-EKE
Perimeter Joints
Perimeter joints are provided at the outer edges of any tile installation to accommodate
movements attributable to changes in moisture, temperature, and loading. See figures
1, 2, and 3.
2 SILL SEAL BAND
If Schluter®-DILEX corner movement profiles will not be used, Schluter®-Systems
recommends the use of sill seal (a compressible polyethylene gasket used to seal the
gap between foundations and sill plates) as a quality control measure when providing
perimeter movement joints. The sill seal band is placed against perimeter structures
before any component of the tile assembly is installed, (e.g., DITRA-HEAT, additional
underlayments including self-leveling materials, mortar beds, etc. See figures 2 and 3).
After the tile is installed and grouted, any excess sill seal material is cut away, leaving a
movement joint with uniform width that is void of any mortar, grout, or other restraining
materials that would render the joint ineffectual.
Surface Joints
Surface joints must be placed within the tiled surface regardless of substrate conditions.
They provide for stress relief from movements in the tile field due to thermal and moisture
expansion/contraction and loading. See figure 4.
3 PERIMETER JOINT
Expansion Joints
Expansion joints permit both horizontal and vertical differential movements attributable
to thermal and moisture expansion/contraction by providing a complete separation
for the full depth of the slab to allow for free movement between adjoining parts of
a structure or abutting surfaces. They are typically placed at columns, walls, and
any other restraining surfaces. Expansion joints must be continued through the tile
covering. The DITRA-HEAT membrane is separated at expansion joints and the joint is
continued through the tile covering using DILEX movement joint profiles. The DITRAHEAT-E-HK heating cables must not cross expansion joints. When DITRA-HEAT
is used as waterproofing, the abutted sections must be covered with KERDI-FLEX
or KERDI-BAND.
4 Schluter®-DILEX-BWS
Cold Joints
Cold (construction) joints occur where two successive placements of concrete meet.
True cold joints bond the new concrete to the old and do not allow movement. However,
it takes extra care to accomplish this, so they are usually designed to act as expansion
or control/contraction joints. Cold joints are treated in the same manner as expansion
joints. See above.
Control/Contraction Joints
Control/contraction joints are designed to induce controlled cracking caused by drying
and chemical shrinkage at preselected locations. They are typically formed by saw
cutting, tooling, or through the use of inserts. DITRA-HEAT is not separated at control/
contraction joints; however, surface movement joints must be provided in the tile
covering in accordance with the aforementioned guidelines. See also Surface Joints.
Structural or Seismic Joints
Regarding structural and seismic expansion joints, please contact Schluter®-Systems at
1-800-472-4588 (USA) or 1-800-667-8746 (Canada) for proper installation guidelines.
12
MOVEMENT JOINTS
Note regarding residential applications
Due to the increased popularity of continuous tile installations (i.e., tile continuing from room to room on a given floor), movement joints
have become both increasingly important and increasingly difficult to provide. For instance, consider the residential installation shown in
Figure 5. It is almost certain that the homeowner will resist the idea of placing movement joints across any of the rooms shown in the figure,
despite TCNA, TTMAC, and Schluter®-Systems guidelines. However, the need for movement joints in this installation is undeniable, given the
extended size of the field. The question then becomes, “How does one provide the movement joints necessary to ensure a durable installation
without compromising the aesthetic qualities of the continuous tile field?”
The easiest way to accomplish this goal is to begin by providing movement joints at the perimeter of the installation. Perimeter joints are
absolutely necessary and do not interrupt the tile field. The next step would be to place movement joints at the thresholds between rooms or
where a tiled hallway meets a larger tiled room. These locations are relatively inconspicuous and the lines formed by the movement joints are
logical in that they reflect the natural perimeter of each room. Finally, determine if any other characteristics of the floor plan invite the placement
of additional movement joints. In this example, the intersection of the nook area and kitchen/family room may be a reasonable choice.
Figure 5
Nook
Kitchen
Family
Room
Study/Office
Living/Dining
Room
Master
Suite
Schluter®-Systems understands that the tile setter must take into account the needs of his or her client in determining the placement
of movement joints in a tile installation. For example, a client may not wish to interrupt a continuous tile field that spans multiple rooms.
However, as indicated by the orange lines above, there are ways to meet industry guidelines that will serve to provide the client with a
durable installation that remains aesthetically pleasing.
MOVEMENT JOINTS
13
WOOD UNDERLAYMENT
Plywood/OSB underlayment installation guidelines
DISCUSSION
In some applications referenced in this Handbook, adding a layer of plywood or OSB before installing DITRA-HEAT and
the ceramic or stone tile covering is required to reduce deflection and curvature of the sheathing between the joists.
INSTALLATION GUIDE
Place underlayment panels (Exposure 1, plugged-face plywood or OSB) with long dimension perpendicular to floor joists
such that the following conditions are met:
1.Abut all underlayment end joints at quarter points between joists.
Example: Abut underlayment panels on either side of the joist centerline at: 4" (102 mm) for 16" (406 mm) o.c. joists,
5" (127 mm) for 19.2" (488 mm) o.c. joists, or 6" (152 mm) for 24" (610 mm) o.c. joists (see figures 1 & 2).
Note: Underlayment end joints should be placed as far away from subfloor end joints as possible.
2.Underlayment to overlap edge joints of subfloor by 1/2 of the width of the subfloor panel (24" - 610 mm). At restraining
surfaces, overlap may be less than 24" (610 mm) when the subfloor panel is less than 48" (1.2 m)-wide (see figure 1).
3.Gap underlayment panels 1/8" (3 mm) on all ends and edges, and 1/4" (6 mm) at perimeter walls, cabinetry, or other
restraining surfaces.
Figures 1 & 2 – Typical Subfloor/Underlayment Detail (Not to Scale)
Figure 1
Figure 2
Plywood/OSB Type and Fastener Schedule Guidelines
Plywood/OSB
Grades
Exposure 1,
plugged-face
plywood or OSB
Plywood/OSB
Thickness - in (mm)
Maximum On-Center Fastener Spacing - in (mm)
Panel Edges
Field
3/8 (10)
4 (102)
6 (152)
1/2 (13)
4 (102)
6 (152)
Greater than 1/2 (13)
6 (152)
6 (152)
The following guidelines must be followed when fastening underlayment panels:
1.Use ring shank nails (no staples) or wood screws (no drywall screws).
2.Fasteners must pass through entire thickness of underlayment and subfloor panels with minimal penetration into
joists (see figure 2).
FINAL WORD
As stated previously, Schluter®-Systems requires that any underlayment panel must have a minimum thickness of 3/8"
(10 mm). When in doubt, increase underlayment thickness.
14
WOOD UNDERLAYMENT
INSTALLATION
Schluter®-DITRA-HEAT membrane and heating cables
Planning
• For access to the DITRA-HEAT Calculation Sheet and DITRA-HEAT Online Calculator, see www.schluter.com.
• Select DITRA-HEAT membrane according to the size of the area to be tiled.
• Select DITRA-HEAT-E-HK heating cable according to the size of the area to be heated. Be sure to measure accurately. The heating cable CANNOT be cut to fit. The allowable
heated area is limited by the minimum required spacing from fixed elements such as:
• Walls or fixtures = 3" (75 mm)
• Heat sources (baseboard heaters, fireplaces, forced air heating ducts, etc.) = 8" (200 mm)
• Floor Drains = 6" (150 mm)
• Two or more DITRA-HEAT-E-HK heating cables can be connected and controlled by a single DITRA-HEAT-E-RS thermostat if the total current is less than 16 amps.
The heating cable leads must be wired in parallel according to applicable electrical and building codes.
• Multiple DITRA-HEAT-E-HK heating cables over 16 amps cannot be connected to a single DITRA-HEAT-E-RS thermostat. Additional DITRA-HEAT-E-RS thermostats must be
used or a control system comprised of relays and low voltage thermostats may be substituted (if the heating cables are in one room). The system must still incorporate a floor
temperature sensor and the circuit must be protected by a GFCI.
Preparation
• The substrate must be clean, even, and load bearing. Any leveling of the subfloor must be done prior to installing DITRA-HEAT.
• For wood substrates, verify that panels are properly fastened. Tightly butted and/or tented plywood or OSB seams must be addressed prior to installing DITRA-HEAT. If a
plywood/OSB underlayment is to be installed, follow the Wood Underlayment guidelines on page 14.
• For vinyl substrates, ensure that the structure beneath is sound and adequate and that the vinyl is well adhered. Remove any wax and clean the surface. For vinyl over wood
structures, nail off floor with ring shank flooring nails every 4" (102 mm) o.c. - fasteners must pass through entire thickness of assembly with minimal penetration into joists.
• For concrete substrates, remove any waxy or oily films and curing compounds (if present) by mechanical scarification. When bonding DITRA-HEAT to particularly dry, porous
concrete, the slab should be moistened to saturate the concrete and help prevent premature drying or skinning of the bond coat. Excess or standing surface water must be
removed prior to installation.
• For gypsum substrates, residual moisture in gypsum screed must be 2.0% or less before installing DITRA-HEAT. Follow gypsum manufacturer’s directions for additional
substrate preparation.
Membrane
1 Using a thin-set mortar that is suitable for
the substrate, apply the thin-set mortar
(mixed to a fairly fluid consistency, but still
able to hold a notch) using a 1/4" x 1/4"
(6 mm x 6 mm) square-notched trowel.
2 Apply DITRA-HEAT to the floor, fleece
side down. Solidly embed the matting into
the mortar using a float, screed trowel, or
DITRA-ROLLER, making sure to observe
the open time of the bonding mortar. If the
mortar skins over prior to matting installation,
remove and reapply.
When using the DITRA-ROLLER, place a weight
(e.g., bags of mortar/grout or box of tile) not to
exceed 75 lbs on the DITRA-ROLLER shelf. Slowly
move the roller from one end of the matting to the
other, slightly overlapping successive passes.
ESTIMATED THIN-SET COVERAGE
To bond DITRA-HEAT to the substrate:
Use one 50 lb. (22.68 kg) bag of mortar per
100 ft2 (9.3 m2).
To bond the tile to the DITRA-HEAT, using a
1/4" x 3/8" (6 mm x 10 mm) square- or
U-notched trowel: Use one 50 lb (22.68 kg) bag
of mortar per 40 - 50 ft2 (3.7 - 4.6 m2).
3 Lift up a corner of the matting to check
coverage. Proper installation results in full
contact between the fleece webbing and
the thin-set mortar. Note: Coverage may
vary with mortar consistency, angle at which
the trowel is held, substrate flatness, etc. If
full coverage is not achieved, remove and
reapply, making sure to verify proper mortar
consistency and application.
4 Abut end and side sections of adjacent sheets.
Note: Aligning the studs on the top of the
matting during installation can help make
subsequent heating cable installation easier.
To bond the tile to the DITRA-HEAT, using a 1/2"
x 1/2" (13 mm x 13 mm) square- or U-notched
trowel: Use one 50 lb (22.68 kg) bag of mortar
per 30 - 40 ft2 (2.8 - 3.7 m2).
INSTALLATION
15
Heating Cables
Warning
• Before installing and operating this product, the user and/or installer must read, understand and follow these instructions and keep them
handy for future reference.
• If these instructions are not followed, the warranty will be considered null and void and the manufacturer deems no further responsibility
for this product.
• The following instructions must be adhered to in order to avoid personal injuries or property damages, serious injuries and potentially
fatal electric shocks.
• This product must be installed by a qualified person in accordance with this installation handbook and with the Canadian Electric Code
Part I (Canada) or the National Electric Code (U.S.) as applicable. All electric connections must be made by a qualified electrician,
according to the electrical and building codes effective in your region.
• A dedicated circuit is required for each application.
• Ground fault equipment protection (i.e., GFCI) is required for each circuit (included in the DITRA-HEAT thermostats).
• Never install a cable designed for a 120 V power source on a 240/208 V power source.
• This cable must be grounded.
• Mark the appropriate circuit breaker reference label indicating which branch circuit supplies the circuit to the floor warming heating
cable system.
• De-energize all power circuits before installation and servicing.
• Very important: Never CUT the heating cable. This would change the cable resistance and could lead to a fire.
• Heating cables shall not be altered in the field. If the installer or the user modifies the unit, he will be held responsible for any damage
resulting from this modification, and the warranty and the product certification will be void.
• The heating section of the cable must be entirely installed under the floor covering. The installation is characterized as a Type C
(Embedded Floor Warming) application. In order to prevent a fire hazard, do not install it anywhere else (e.g. in a wall).
• Do not run the heating cable under a wall, from one room to another; an individual cable must not heat more than one room.
• Never install the heating cable under vanities, bathtub platforms, kitchen cabinets and islands or any other fixtures. Excessive heat will
build up in these confined spaces and may cause a fire.
• Never use the heating cable for any purpose other than heating a floor INSIDE a building.
• Always keep a 3 stud (3-1/2" – 9 cm) spacing between cable runs. A narrower spacing may cause a fire or damage the floor covering.
A wider spacing may not provide sufficient power to warm the floor.
• Heating cables may not touch, cross over, or overlap one another.
• Minimum spacing from walls or fixtures (e.g., cabinets) is 3" (75 mm).
• Minimum spacing from other heat sources (baseboard heaters, fireplaces, forced air heating ducts, etc.) is 8" (200 mm).
• Minimum spacing from any plumbing drain is 6" (150 mm).
• It is helpful to plan the location of a buffer zone, as it is not possible to predict where the heating cable will end. The buffer zone is an
area where heating is not essential, typically behind a toilet or adjacent to a door opening. This area allows for placement of excess
heating cable.
• Heating cable testing is required while the heating cable is on the spool and at two subsequent steps during installation to ensure cable
quality and for warranty purposes. A megohmmeter is required for the insulation resistance testing of the heating cables.
• Never energize the cable while it is on the spool. This would lead to overheating that could damage the cable and may cause a fire.
• The minimum temperature at which the cable should be installed is 32˚ F (0˚ C).
• Avoid folding the heating cable on itself, a radius of curvature less than 0.0625 inch (1.6 mm) could damage its sheath.
• The minimum installed bending radius of the heating cable is 0.5 inches (12.7 mm).
16
INSTALLATION
i
To avoid damaging the DITRA-HEAT-E-HK heating cable spool due to handling, we recommend turning the box over to
remove the spool from the packaging box. Then pick up the spool from underneath the heating cable coil, but not by the
cardboard washers.
Heating Cable Tests
Test 1: Conductor resistance test
In order to perform the resistance test, you must set your multimeter for resistance
measurement and take an ohms reading between the two power leads. If the ohms reading
taken on the two power leads varies significantly (10% or more) from the value printed on the
spool, it either means that the cable has been damaged, or that the measuring instrument
is not set properly, or that it is simply out of calibration. The ohms measurement must be
recorded in your heating cable tests log (page 26).
Test 2: Continuity between the braid and the two conductors
The heating cable is protected by a ground braid. An electrical insulator prevents any
contact between the braid and the two conductors. To make sure there is no contact
between the braid and the two conductors, you must perform a continuity test. Using
the continuity test (buzzer logo) function of your multimeter, test your cable between the
braid and one of the two power leads. If there is no continuity (if the test is successful),
the multimeter will display, depending on the instrument used, either “OL ” for “over load”
or “I” for “infinity”. Otherwise, if the test fails, neither “OL ”, nor “I” will be displayed and a
warning tone will be heard. The test result must be recorded in your heating cable tests
log (page 26).
Test 3: Insulation resistance test
This test is meant to detect very small breaks throughout the cable insulation. These breaks
often remain undetected during the continuity test since they are not necessarily short circuits
between the conductor and the ground braid. Even though they are small, these breaks
are likely to cause a current leakage to ground. Such a leakage is usually detected by the
mandatory ground-fault circuit interrupter “GFCI” (thermostat with integrated GFCI or panel
mount GFCI). When a current leakage is detected, the GFCI trips the circuit, thus disabling
the floor heating system. In order to perform the insulation resistance test, you must, using
a megohmeter (Mohm logo), take an insulation measurement between the braid and one
of the two power leads. Make sure the megohmeter range is set at 1000 V. The insulation
resistance measurement must be equal to or greater than 1 Gigaohms (1 Gigaohms = 1 G
ohms = 1000 M ohms = 1000 Mega ohms). The insulation resistance measurement must be
recorded in your heating cable tests log (page 26).
DITRA-HEAT Thermostat Floor Temperature Sensor Testing
Test the floor temperature sensors using a multimeter to verify accuracy of the sensors. Set the multimeter for resistance at 10K Ω +/- 2
(at room temperature) and take a reading between the sensor leads. The resistance will vary according to the temperature (i.e., the colder
the sensor, the higher the resistance). Compare the measured values with the table of expected values and record in the heating cable
tests log on page 26.
INSTALLATION 17
Installation
It is recommended that the installation of the DITRA-HEAT system is photographed (e.g., heating cable layout, floor temperature sensor placements,
transition splice location, end splice location, and wide view of the room) for reference with future renovation work and troubleshooting. The homeowner/
end user should retain these photos for their records.
1 Before the heating cable is removed from
the spool, conduct the first set of required
tests and record values in the heating cable
tests log (page 26). If a break or damage is
detected during the tests, return the heating
cable to the original place of purchase.
2 Thread the heating cable cold lead and remote
sensors through a conduit from the base of
the wall to the thermostat electrical box. The
heating cable cold lead must not be cut.
3 Mark where the cold/hot splice will be
placed, cut the DITRA-HEAT matting, and
insert the splice. It may be necessary to
temporarily secure the splice to the floor with
thin-set mortar or adhesive (e.g., KERDI-FIX
or hot glue).
Once the heating cable cold lead and remote
sensors are threaded to the thermostat
electrical box, install a metal protection plate
at the base of the wall. This will help prevent
any damage from fasteners (e.g., nails,
screws, etc.) in the future.
Cable must be turned or a u-shaped
"jog" created at 10 ft (3 m) run
4 Embed the heating cables between studs, at
a spacing of 3 studs (3-1/2" – 9 cm). Closer
spacing may result in overheating and damage
to building structures. A wider spacing may
not provide sufficient power to warm the floor.
5 Use care not to damage the cables during
installation, particularly before the cables are
embedded in the matting.
Notes:
• Make sure to leave space for inserting the floor temperature sensor(s).
• Heating cables may not touch, cross over, or overlap one another.
• The maximum allowable length of a single run is 10 ft (3 m); the cable must be turned or a u-shaped "jog" created at this point (see image above).
• Minimum spacing from:
• Walls or fixtures (e.g., cabinets) is 3" (75 mm)
• Other heat sources (baseboard heaters, fireplaces, forced air heating ducts, etc.) is 8" (200 mm)
• Plumbing drains is 6" (150 mm)
6 Install the thermostat sensors between two cable runs, at a distance of at least 24" (610 mm) from
the wall. Mark the sensor location on the DITRA-HEAT and cut the matting to house the sensor.
It is recommended to temporarily remove the heating cable from the area while cutting the matting.
It may be necessary to temporarily secure the sensor to the floor with thin-set mortar or adhesive
(e.g., KERDI-FIX or hot glue). Embed the sensor wire in the matting without overlapping or crossing
the heating cable.
18
INSTALLATION
7 Once the heating cable and floor temperature
sensor installation is complete, retest and
record values in the heating cable tests log
(page 26).
Waterproofing
The following steps are required for waterproofing only:
Note: While the heating cable is protected by the DITRA-HEAT matting, be careful when applying the mortar to not damage the cable with the
notched trowel.
1 At the joints, fill the matting with unmodified
thin-set mortar, approximately 8" (203 mm)
wide, centered over the joint.
4 At all wall junctions, apply KERDI-BAND as
described in steps 1-3, centered where the
wall and floor meet. In some applications
the vertical section of the floor/wall transition
will not accept a bond to unmodified
thin-set mortar. Connections to such
elements can be achieved using KERDI-FIX
sealant and bonding compound or suitable
trowel-applied waterproofing materials, such
as those that require atmospheric moisture
to cure (e.g., urethane sealant).
2 Comb
additional unmodified thin-set
mortar over the joint using a 1/4" x 3/16"
(6 mm x 5 mm) V-notched trowel or the
KERDI-TROWEL, which features a 1/8" x 1/8"
(3 mm x 3 mm) square-notched design.
3 Apply 5" (127 mm)-wide KERDI-BAND,
centered over the joint. Using the flat side
of the trowel, firmly press the banding into
the mortar to ensure 100% coverage and to
remove excess mortar and air pockets.
Note: KERDI-BAND must lap DITRA-HEAT at seams and at floor/wall transitions by a minimum of
2" (50 mm) in order to maintain waterproof integrity.
INSTALLATION 19
Tiles
Note: While the heating cable is protected by the DITRA-HEAT matting, be careful when applying the mortar to not damage the cable with the
notched trowel.
1 Tile can be installed over DITRA-HEAT
immediately; no need to wait for the mortar
to cure. Fill the matting with unmodified
thin-set mortar and comb additional mortar
over the matting using a trowel that is
appropriate for the size of the tile.
2 Solidly embed the tiles in the setting material,
making sure to observe the open time of the
bonding mortar. If the mortar skins over prior
to tile installation, remove and reapply.
3 Periodically remove and check a tile to
ensure that full coverage is being attained.
Note: Coverage may vary with mortar consistency, angle at which the trowel is held, substrate flatness, etc. If full coverage is not achieved, remove
and reapply, making sure to verify proper mortar consistency and application. For large-format tiles, e.g., 12" x 12" (305 mm x 305 mm) and larger,
back-buttering the tiles with a skim coat of thin-set mortar is a useful way to help ensure proper coverage. The skim coat can fill in the concave area on
the back of the tile (ceramic tiles are not perfectly flat) and improve contact with the mortar combed on the substrate.
ESTIMATED THIN-SET COVERAGE
To bond DITRA-HEAT to the substrate:
Use one 50 lb. (22.68 kg) bag of mortar per 100 ft2 (9.3 m2).
To bond the tile to the DITRA-HEAT, using a 1/4" x 3/8" (6 mm x 10 mm) square- or U-notched trowel:
Use one 50 lb (22.68 kg) bag of mortar per 40 - 50 ft2 (3.7 - 4.6 m2).
To bond the tile to the DITRA-HEAT, using a 1/2" x 1/2" (13 mm x 13 mm) square- or U-notched trowel:
Use one 50 lb (22.68 kg) bag of mortar per 30 - 40 ft2 (2.8 - 3.7 m2).
4 Once the tile installation is complete, retest
the heating cable and record values in the
heating cable tests log (page 26).
Allow the assembly to cure for 7 days after
grouting before putting the floor warming
into service.
Operating Tips
• Do not place furniture or mats over the floor temperature sensor. They can act as insulation and raise the floor temperature reading at the thermostat.
This may cause the heating to turn off before the remainder of the floor reaches the desired temperature.
• Area rugs are not recommended over the DITRA-HEAT system.
• Futons, mattresses, floor-level furniture, pillows, etc. must not be placed directly onto the heated floor. Placement of items directly onto the heated floor
will prevent heat diffusion (i.e., air circulation) and could result in damage.
20
INSTALLATION
THIN-SET FACTS
Discussion of thin-set mortars and Schluter®-DITRA-HEAT installations
QUESTION: Can ceramic tile, including porcelain tile, be set
on DITRA-HEAT with unmodified thin-set mortar?
ANSWER: YES. In fact, we recommend it. Here’s why:
Portland cement-based unmodified thin-set mortars are dependent on the presence
of moisture for hydration in order to gain strength. Since DITRA-HEAT is impervious, it
does not deprive the mortar of its moisture. This allows the cement to properly hydrate,
resulting in a strong, dense bond coat. In fact, after the mortar has reached final set
(usually within 24 hours), unmodified thin-set mortars achieve higher strengths when
cured in continually moist conditions.
QUESTION: Can ceramic tile, including porcelain tile, be set on DITRA-HEAT with latex-modified
thin-set mortar?
ANSWER: We DON'T recommend it. Here’s why:
Latex-modified mortars must air dry for the polymers to coalesce and form a hard film in order to gain strength. When sandwiched between
two impervious materials such as DITRA-HEAT and ceramic tile, including porcelain tile, drying takes place very slowly through the open
joints in the tile covering. [According to the TCNA Handbook for Ceramic, Glass, and Stone Tile Installation, this drying period can fluctuate
from 14 days to over 60 days, depending on the geographic location, the climatic conditions, etc.]. Therefore, extended cure times would
be required before grouting if using modified thin-set mortars between DITRA-HEAT and ceramic tile, including porcelain tile. If extended
cure times were not observed, the results could be unpredictable.
ADDITIONAL NOTES
25 years of field experience and testing by the Tile Council of North America (TCNA) support the efficacy of using unmodified thin-set
mortars to bond ceramic tile, including porcelain tile, to uncoupling membranes.
Remember, the type of mortar used to apply DITRA-HEAT depends on the type of substrate. The mortar must bond to the substrate and
mechanically anchor the fleece on the underside of the DITRA-HEAT. For example, bonding DITRA-HEAT to wood requires latex-modified
thin-set mortar. When bonding DITRA-HEAT to particularly dry, porous concrete with unmodified thin-set mortar, the slab should be
moistened to saturate the concrete and help prevent premature drying of the mortar. Excess or standing surface water must be removed
prior to installation. Additionally, all mortars (modified and unmodified) have an acceptable temperature range that must be observed during
application and curing.
THIN-SET FACTS
21
TESTING & CERTIFICATIONS
Product Evaluation
Schluter®-Systems is committed to providing reliable installation systems for ceramic and stone tile. As part of this commitment, we have
invested considerable resources in testing our products and obtaining certifications where applicable to provide our customers and local
code officials with relevant data that supports the efficacy of our systems. All the testing referenced below was performed by independent
laboratories.
Uncoupling and Support/Load Distribution
The method used to establish the overall performance of a tile assembly under loading is the ASTM C627 “Standard Test Method for
Evaluating Ceramic Floor Tile Installation Systems Using the Robinson Type Floor Tester.” The assembly is tested in cycles using a loaded,
revolving carriage. Load, wheel hardness, and number of revolutions vary with each cycle. Once a specified level of damage is exceeded,
the test is stopped. The TCNA Handbook for Ceramic, Glass, and Stone Tile Installation assigns performance levels to an assembly
based on the number of cycles successfully completed. The ratings include residential, light, moderate, heavy, and extra heavy, in order
of improving performance.
Report Number
Substrate
Joist Spacing
Tile
Rating
TCNA-415-13
OSB
TCNA-415-13
OSB
19.2" o.c.
12" x 12" porcelain
Extra Heavy
24" o.c.
12" x 12" carrara marble
Light
TTMAC-UFT09-2013
TCNA-415-13
Concrete
N/A
12" x 12" porcelain
Moderate
Concrete
N/A
2" x 2" porcelain
Light
Schluter -DITRA-HEAT
®
Assembly Notes:
1. All plywood and OSB subfloors were 23/32" (3/4" nom.) -thick; 11/32" (3/8" nom.) -thick OSB underlayment added for carrara marble test
2. DITRA-HEAT bonded to OSB with modified thin-set mortar (ANSI A118.11)
3. DITRA-HEAT bonded to concrete with unmodified thin-set mortar (ANSI A118.1)
4. Tile bonded to DITRA-HEAT with unmodified thin-set mortar (ANSI A118.1)
5. Polymer-modified cement grout (ANSI A118.7)
The test results above demonstrate that DITRA-HEAT performs extremely well under load while at the same time providing flexibility within
the shear plane.
Waterproofing
DITRA-HEAT matting provides reliable waterproofing in interior applications. The product has been found to meet or exceed the
requirements of the American National Standard Specifications for Load Bearing, Bonded, Waterproof Membranes for Thin-set Ceramic
Tile and Dimension Stone Installation A118.10.
Certifications
Heating cables – The DITRA-HEAT-E-HK heating cables sets are certified or listed to the following standards and usage:
• CAN/CSA-C22.2 No. 130-03 "Requirements for Electrical Resistance Heating Cables and Heating Device Sets" under usage
markings GXW for general use (G) with a wet rating (W), but specifically (X) for embedded indoor floor warming applications.
• UL 1673 "Electric Space Heating Cables" for installation in poured masonry floors within enclosed structures.
• ANSI/IEEE 515.1-2005 "IEEE Standard for the Testing, Design, Installation, and Maintenance of Electrical Resistance Heat Tracing
for Commercial Applications" for installation Type C embedded floor warming within enclosed structures.
Thermostat – The DITRA-HEAT-E-RS digital thermostats are certified or listed to the following standards:
• Certified to CSA C22.2 No. 24-93 (Reaffirmed 2003) “Temperature-Indicating and Regulating Equipment”.
• Listed to UL 873 “Temperature-Indicating and Regulating Equipment” 11th Edition, containing revisions through and including
April 18th, 2006.
Membrane
• ICC-ES Report No. ESR-2467
• ICC-ES PMG Report No. PMG-1204
• U.S. Pat. No. 8,950,141, and U.S. DES. PAT. No. D706459
Canada D Schluter Systems L.P. and other patents pending
22
TESTING & CERTIFICATIONS
Certifications and listings may be accessed
via our website at www.schluter.com
NATURAL STONE
Discussion of natural stone and single-layer wood subfloors
Natural stone is a product of nature with a wide variety of colors, patterns, and textures that come together to distinguish it as one of the
premiere surface coverings available on the market. Some of stone’s characteristics, which add to its beauty and uniqueness, are veins,
fissures, starts, and dry-seams. While these characteristics enhance its aesthetic appeal, they’re also indicators that point to the inherent
variability of the flexural strength of natural stone, which can have detrimental effects on serviceability. This variability is underscored by
examining the range of typical flexural (bending) strengths of ceramic tile compared to the range of strength for some common natural stones.
Schluter®-Systems contracted the Tile Council of North America (TCNA) to perform flexural strength testing on various commercially available
ceramic tiles and dimension stones guided by the ASTM C880 Standard Test Method for Flexural Strength of Dimension Stone. Five samples
of each tile and stone were tested, with the minimum recorded values displayed in the figure below. We have chosen to show only minimum
values since these represent the weakest samples, which would be most prone to cracking in service over a bending substrate.
6000
Minimum Recorded Flexural Strength (psi)
5236
5000
4485
4241
4000
3000
2490
2438
2000
1856
1488
1000
539
0
Porcelain A
Ceramic B
Porcelain B
Granite
Ceramic A
White Carrara
Slate
Crema Marfil
337
Travertine
It is clear from the figure that the minimum recorded flexural strengths of these dimension stones tend to be significantly less than those
of the ceramic tiles. In some cases, the differences are dramatic. For example, the minimum recorded flexural strength of the weakest
travertine sample (337 psi) was only 14% of the minimum flexural strength of the weakest ceramic sample (2438 psi). In other words, the
weakest ceramic sample was more than 7 times as strong as the weakest travertine sample. As another example, the minimum recorded
flexural strength of the weakest porcelain sample is more than 12 times as strong as the minimum recorded flexural strength of the weakest
travertine sample.
Q. Why does Schluter®-Systems recommend a double-layer wood floor for installing natural stone over DITRA-HEAT?
A. There are three principle reasons: 1) As illustrated above, the fact that most stone products have a minimum flexural strength that
is substantially lower than what is typical for ceramic tile; 2) Stones are products of nature and complex heterogeneous materials with
naturally occurring regions of discontinuity, such as veins and fissures. Such features can be weaker than the surrounding stone fabric and
act as “stress risers,” concentrating bending stresses within the region of discontinuity; and 3) When wood floor assemblies are subjected
to forces such as loading – both live and dead loads – they produce flexural stresses in the surface covering which can cause weak and
brittle materials to break or crack.
Engineering mechanics as well as field observations show that the location of maximum flexural stresses in the floor assembly is directly
over the floor joists and at seams in the subfloor panels. Therefore, we recommend double-layer wood floors when installing natural stone
in order to increase the stiffness of the sheathing assembly and position underlayment seams away from the joists to minimize flexural
stresses in the stone covering directly above the joists and at seams. Refer to page 14 for underlayment installation guidelines. For more
information on the development of these guidelines, please refer to the article titled “Position of Underlayment to Prevent Cracked Tile and
Grout” on our website at www.schluter.com/5138.aspx.
NATURAL STONE 23
PRODUCT & ORDERING INFO
The ordering information for the Schluter®-DITRA-HEAT and KERDI components outlined in this Handbook is located below.
For technical support, Illustrated Price List, or to receive additional information on our complete product line, please call 800-472-4588 (USA)
or 800-667-8746 (Canada), or visit our comprehensive website at www.schluter.com.
Schluter ®-DITRA-HEAT
DITRA-HEAT is a polypropylene membrane with a cut-back stud structure and an anchoring
fleece laminated to the underside. The matting is 1/4" (5.5 mm) thick. The stud structure is specifically designed
to secure DITRA-HEAT-E-HK electric floor heating cables. DITRA-HEAT integrates customizable electric floor
warming with the functions associated with DITRA: uncoupling, waterproofing, vapor management and support
to ensure a long lasting installation.
Uncoupling and waterproofing membrane (1/4" – 5.5 mm)
Item No.
DH5 12M
DH5 MA
Item
Roll
Sheet
Dimensions
3' 3" x 41' 1" = 134.5 ft2 (1 m x 12.5 m = 12.5 m2)
3' 3" x 2' 7" = 8.6 ft2 (1 m x 0.8 m = 0.8 m2)
U.S. Pat. No. 8,950,141, and U.S. DES. PAT. No. D706459
Canada D Schluter Systems L.P. and other patents pending
Schluter ®-DITRA-HEAT-E-HK
DITRA-HEAT-E-HK are twisted pair heating cables designed for integration with the DITRA-HEAT uncoupling
membrane in interior floor warming applications. The cables can be installed without returning to the thermostat
and produce virtually zero electromagnetic fields.
Item No.
Length
Heating cable (120 V)
DHE HK 120 16
52.9 ft (16.1 m)
DHE HK 120 27
88.2 ft (26.9 m)
DHE HK 120 32
105.8 ft (32.2 m)
DHE HK 120 38
124.1 ft (37.8 m)
DHE HK 120 43
141.1 ft (43.0 m)
DHE HK 120 64
212.9 ft (64.9 m)
DHE HK 120 83
275.5 ft (84.0 m)
DHE HK 120 92
303.0 ft (92.4 m)
DHE HK 120 102
336.9 ft (102.7 m)
Heating cable (240 V)
DHE HK 240 21
70.6 ft (21.5 m)
DHE HK 240 32
105.8 ft (32.2 m)
DHE HK 240 53
176.3 ft (53.7 m)
DHE HK 240 75
248.2 ft (75.7 m)
DHE HK 240 129
425.8 ft (129.8 m)
DHE HK 240 167
551.0 ft (167.9 m)
DHE HK 240 204
673.8 ft (205.4 m)
DHE HK 240 269
888.0 ft (270.7 m)
Average Power Current
Total Power (Watts/ft
2
– Watts/m2) (Amps)
Area
16.0 ft2 (1.5 m2)
26.7 ft2 (2.5 m2)
32.0 ft2 (3.0 m2)
37.5 ft2 (3.5 m2)
42.7 ft2 (4.0 m2)
64.4 ft2 (6.0 m2)
83.3 ft2 (7.7 m2)
91.7 ft2 (8.5 m2)
101.9 ft2 (9.5 m2)
203 W
338 W
405 W
475 W
540 W
815 W
1055 W
1160 W
1290 W
12.7 - 136.3
12.7 - 136.3
12.7 - 136.3
12.7 - 136.3
12.7 - 136.3
12.7 - 136.3
12.7 - 136.3
12.7 - 136.3
12.7 - 136.3
1.7
2.8
3.4
4.0
4.5
6.8
8.8
9.7
10.7
21.4 ft2 (2.0 m2)
32.0 ft2 (3.0 m2)
53.3 ft2 (5.0 m2)
75.1 ft2 (7.0 m2)
128.8 ft2 (12.0 m2)
166.7 ft2 (15.5 m2)
203.8 ft2 (18.9 m2)
268.6 ft2 (25.0 m2)
270 W
405 W
675 W
950 W
1630 W
2110 W
2580 W
3400 W
12.7 - 136.3
12.7 - 136.3
12.7 - 136.3
12.7 - 136.3
12.7 - 136.3
12.7 - 136.3
12.7 - 136.3
12.7 - 136.3
1.1
1.7
2.8
4.0
6.8
8.8
10.7
14.2
Each heating cable includes a floor temperature sensor compatible with the DITRA-HEAT-E-RS thermostat and
features an approximately 7 ft (2.1 m) long cold lead.
Heating cable repair kits are available. Please contact Customer Service for more information.
Schluter ®-DITRA-HEAT-E-RS
DITRA-HEAT-E-RS are digital thermostats to control the DITRA-HEAT-E-HK heating cables (either 120 V
or 240 V). The thermostats feature a 5 mA built-in ground fault circuit interrupter (GFCI) with indicator light.
The DITRA-HEAT-E-RS thermostats have an electrical current limit of 16 amps. A floor temperature sensor is
included. The programmable version features more than 250 pre-set programs and anticipated start function.
The non-programmable version features simple on/off and a smart mode acts like a programmable thermostat by
automatically lowering the temperature once per 24 hour period.
Non-programmable
Programmable
Digital thermostat with remote floor temperature sensor
Item No.
DHE RS/BW
DHE RS D/BW
24
PRODUCT & ORDERING INFO
Description
Non-programmable thermostat with floor temperature sensor in bright white
Programmable thermostat with floor temperature sensor in bright white
Schluter ®-DITRA-HEAT-E-KIT
The DITRA-HEAT-E-KIT is an all-inclusive package containing the DITRA-HEAT uncoupling membrane, heating
cable, and programmable thermostat.
Kit containing all necessary components
Item No.
Matting
Heating cable
Thermostat
DHE K 120 40
5 sheets – 43.1 ft2 (4.0 m2)
88' 3" – 26.7 ft2 (26.9 m – 2.5 m2)
1 – white, programmable
DHE K 120 56
7 sheets – 60.3 ft2 (5.6 m2)
124' 0" - 37.5 ft2 (37.8 m - 3.5 m2)
1 – white, programmable
Schluter ®-KERDI-BAND
KERDI-BAND is a waterproofing strip used to seal butt joints and floor/wall connections with the KERDI and
DITRA membranes.
Waterproofing strip
Item No.
KEBA 100/125/5M
KEBA 100/125/10M
KEBA 100/185/5M
KEBA 100/250/5M
KEBA 100/125
KEBA 100/185
KEBA 100/250
Width
5" - 125 mm
5" - 125 mm
7-1/4" - 185 mm
10" - 250 mm
5" - 125 mm
7-1/4" - 185 mm
10" - 250 mm
Length
16' 5" - 5 m
33' - 10 m
16' 5" - 5 m
16' 5" - 5 m
98' 5" - 30 m
98' 5" - 30 m
98' 5" - 30 m
Thickness
4 mil
4 mil
4 mil
4 mil
4 mil
4 mil
4 mil
Note: 1 mil = 1 one-thousandth of an inch
Schluter ®-KERDI-FLEX
KERDI-FLEX is a flexible polyethylene waterproofing strip used to seal movement joints over DITRA-HEAT in specialty
applications where large movements are expected (e.g., over expansion joints).
Waterproofing strip for use above movement joints
Item No.
FLEX 125/5M
FLEX 250/5M
FLEX 125/30
FLEX 250/30
Width
5" - 125 mm
10" - 250 mm
5" - 125 mm
10" - 250 mm
Length
16' 5" - 5 m
16' 5" - 5 m
98' 5" - 30 m
98' 5" - 30 m
Thickness
12 mil
12 mil
12 mil
12 mil
Note: 1 mil = 1 one-thousandth of an inch
Schluter ®-KERDI-KERECK-F
KERDI-KERECK-F are preformed, seamless corners made of KERDI for waterproofing inside and outside corners.
Waterproofing for corners
Item No.
KERECK/FI 2
KERECK/FI 10
KERECK/FA 2
KERECK/FA 10
Thickness
4 mil
4 mil
4 mil
4 mil
Packaging
2 Inside corners
10 Inside corners
2 Outside corners
10 Outside corners
Note: 1 mil = 1 one-thousandth of an inch
Schluter ®-KERDI-FIX
KERDI-FIX is a single-component sealing and bonding compound with a silane-modified polymer base. It is odor-neutral,
UV- and weather-resistant, and contains no solvents. KERDI-FIX is elastomeric and bonds well to most materials, such
as wood, stone, concrete, metal, glass, and many plastics. KERDI-FIX is suitable for the bonding of KERDI waterproofing
membrane to vertical sections of floor/wall transitions that will not accept a bond to unmodified thin-set mortar.
Sealing and bonding compound
Item No.
KERDIFIX/color*
Description
Cartridge – 9.81 oz (290 ml)
*Color Codes
BW
Bright
white
G
Grey
Schluter ®-DITRA-ROLLER
Used to embed DITRA membranes in the bond coat during membrane installation. The lightweight DITRA-ROLLER
features a 14-1/2" (37 cm) wide roller and a shelf for placing 50 to 75 lbs of weight (e.g., bag of thin-set mortar or
grout, box of tiles, etc.). Between uses, it can be conveniently disassembled for transport and storage.
Used to embed uncoupling membranes in the bond coat
Item No.
DIRO
Width
14-1/2" (37 cm)
PRODUCT & ORDERING INFO
25
HEATING CABLE TESTS LOG
Validation for warranty coverage
Each heating cable is subject to factory quality control. However, damage to the cables may happen after the product leaves the factory.
In order to ensure that the cable quality remains unchanged throughout the installation process and for warranty purposes, tests must be
conducted while the cable is still on the spool and during two specific subsequent steps. Measurements must be recorded in the table below
and compared to initial measurements taken when the cable was on the spool in order to enable you to detect any changes related to the
electrical property of the cable. Any installation-related cable damages are not covered by the warranty.
Homeowner/end user must retain this heating cable tests log for warranty purposes.
Heating Cable Tests Log
Project: ___________________________________________________________
Date of installation: ___________________________
Certified electrician: _______________________________________________
Date of start-up: ______________________________
Identification
Factory Value
Conductor Resistance Test
Conductor and Ground Braid Continuity Test
Infinity (I) or
Overload (OL)
Insulation Resistance Test
Equal to or
greater than
1 Gigaohms*
Floor Temperature Sensors Test
Temperature
Resistance
ºC
ºF
Kohms
10
50
18.1
15
59
14.8
20
68
12.1
25
77
10.0
30
86
8.3
*1 Gigaohms = 1 G ohms = 1000 M ohms = 1000 Mega ohms
26
HEATING CABLE TESTS LOG
Before Installation
After Cable Installation
After Tile Installation
WARRANTY
Schluter ®-DITRA-HEAT 10-Year Limited Warranty
COVERAGE AND CONDITIONS: Subject to the conditions and limitations as stated hereinafter, Schluter®-Systems* warrants that the
Schluter®-DITRA-HEAT system (the “Products”)** will meet all composition and performance criteria for a period of ten (10) years from the date of purchase
only when the Products are used and installed in accordance with the terms and conditions of the Schluter®-DITRA-HEAT Installation Handbook and industry
standard guidelines that are not in conflict with the Handbook in effect at the time of installation. Further, efflorescence is considered to be a natural occurrence
with cementitious materials and is therefore not considered to be a defective condition and is not covered by this warranty. It is the responsibility of the owner/
builder/ installer to ensure the suitability of all building materials and all associated building materials for the owner’s intended use. It is recommended that the
owner consult with an experienced and professional installer. This warranty is conditioned and will be considered null and void and Schluter®-Systems
will have the right to refuse any claims if: (a) the Products have been improperly stored or installed, (b) any Schluter product comprising the system has
been altered or otherwise modified in any way without the prior written authorization of Schluter®-Systems, (c) the Products are subject to abusive or abnormal
use, lack of maintenance, or use other than that for which the Products were manufactured, and (d) the nameplate numbers have been removed or modified
from any applicable parts (wire), and (e) the homeowner/end user fails to return a copy of the completed heating cable tests log with the warranty
registration card. Homeowner/end user(s) is responsible to return the warranty registration card with the logs, which may be by mail or
www.schluter.com/registerwarranty. (It is AN INSTALLATION REQUIREMENT THAT the heating cable tests log be completed by the installer
at time of installation and a copy returned with the registration card. We recommend the original logs be retained by homeowner/end users.)
RESOLUTION: Upon return of the registration card with the heating cable logs and compliance with all the aforementioned conditions, if the Products fail to meet
this warranty, then the owner’s exclusive remedy and the sole obligation of Schluter®-Systems, at its election, shall be to a) reinstall or replace the failed portion of the
floor covering assembly or b) pay an amount not to exceed the original square foot cost of the installation of the floor covering assembly verified to be defective. Floor
covering assembly is defined to include all DITRA-HEAT materials (e.g., matting and heating cables), non-reusable flooring surfaces, and the appropriate setting and
grouting materials. Further, due to conditions beyond the control of Schluter®-Systems (e.g., color and shade availability, discontinuation, normal wear and tear),
Schluter®-Systems cannot guarantee or warrant an exact match to the specific tile, stone, or other flooring materials used in the installation. In such events,
substantially similar materials may be substituted. This warranty does not cover scratches, dents, corrosion or discoloration caused by excessive heat, chemical
cleaning products and abrasive agents. This warranty does not cover the cost of disconnection or installation.
In the event that the registration card and or heating cable tests log is not completed and returned then the resolution for failure of the Products to meet this
warranty shall be replaced with a twenty-five (25) year Limited warranty that each Schluter Heating Cable purchased shall be free from defects in material and
workmanship effective on the date of the purchase by or for the original purchaser. The warranty shall remain effective for a period of twenty-five (25) years from
the date said original purchase. The maximum liability of the company is limited to the cost of the original Cable multiplied by the percentage of the warranty
period remaining.
DISCLAIMER: THERE ARE NO WARRANTIES BEYOND THIS EXPRESSED WARRANTY AS STATED ABOVE. ALL OTHER WARRANTIES, REPRESENTATIONS
OR CONDITIONS, EXPRESSED OR IMPLIED, ARE DISCLAIMED AND EXCLUDED, INCLUDING WARRANTIES, REPRESENTATIONS OR CONDITIONS OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARISING BY STATUTE OR OTHERWISE BY LAW OR FROM A COURSE OF DEALING
OR USAGE OF TRADE. SCHLUTER-SYSTEMS EXCLUDES AND IN NO EVENT SHALL HAVE ANY LIABILITY FOR LOST PROFITS OR ANY OTHER INDIRECT,
SPECIAL, INCIDENTAL, PUNITIVE, EXEMPLARY, OR CONSEQUENTIAL DAMAGES, ARISING OUT OF OR OTHERWISE CONNECTED TO FAILURE OF THE
PRODUCTS OR FLOORING SYSTEM OF WHICH THEY ARE PART, NOR MISUSE OF THE PRODUCTS OR FLOORING SYSTEM, REGARDLESS OF ANY
STRICT LIABILITY, ACTIVE OR PASSIVE NEGLIGENCE OF SCHLUTER SYSTEMS, AND REGARDLESS OF THE LEGAL THEORY (CONTRACT OR TORT
OR EXTRA-CONTRACTUAL OR OTHER), NOR FROM ACTS OF WAR, TERRORISM, OVERVOLTAGE, FAULTY AND NEGLIGENT PENETRATION OF THE
SYSTEM, FIRES, EXPLOSIONS, ACTS OF GOD, INTENTIONAL ACTS OF DESTRUCTION OR ANY LOSSES DUE TO STRUCTURAL FAILURE OR OTHER
CAUSES UNRELATED TO THE PRODUCTS OR DELAYS, OR ANY OTHER INCIDENTAL OR CONSEQUENTIAL DAMAGES. THIS WARRANTY IS GIVEN IN
LIEU OF ANY OTHER WARRANTY EXPRESSED OR IMPLIED. THE REMEDIES CONTAINED HEREIN ARE THE ONLY REMEDIES AVAILABLE FOR BREACH
OF THIS WARRANTY. THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS; SOME STATES AND PROVINCES DO NOT ALLOW DISCLAIMERS
OR OTHER RESTRICTIONS OF IMPLIED WARRANTIES, SO SOME OF THE ABOVE DISCLAIMERS MAY NOT APPLY TO YOU.
TRANSFERABILITY: This Limited Warranty extends ONLY to the original end user (defined as original intended owner and user of the property/unit in which
the installation is incorporated - herein referred to as “Owner”) and is not transferable or assignable, unless approved in writing by the Technical Director or an
Officer of Schluter®-Systems or otherwise prohibited by specific state or provincial law.
MODIFICATIONS TO WARRANTY: No changes or modification of any terms or conditions of this warranty are allowed unless authorized by written
agreement and signed by the Technical Director or an Officer of Schluter®-Systems.
EFFECTIVE DATE: This warranty shall supersede and replace any and all prior oral or written warranties, agreements, or other such representations made by
or on behalf of Schluter®-Systems relative to the Products or the application of the Products and shall apply to any installation occurring on or after April 1, 2015.
CLAIMS ON THIS LIMITED WARRANTY: To make a claim under this Limited Warranty, the Owner must provide Schluter®-Systems with written notice
within 30 days of any alleged defect in the Products covered by this Limited Warranty, together with date and proof of purchase of the Products, proof of the
costs of the original installation and name and address of all installers and completed heating cable tests log, failing which this Limited Warranty shall be of no
legal effect. Schluter®-Systems reserves the right at its election and as a condition of this Limited Warranty to inspect the alleged failed and defective condition.
All U.S. Claims shall be sent to:
Schluter Systems L.P.
Attn: Warranty Claims Dept.
194 Pleasant Ridge Road
Plattsburgh, NY 12901
All Canadian Claims shall be sent to:
Schluter Systems (Canada), Inc.
Attn: Warranty Claims Dept.
21100 chemin Ste-Marie
Ste-Anne-de-Bellevue, QC H9X 3Y8
*For the purpose of this warranty Schluter Systems, L.P. shall provide the warranty for all products for end users located in the United States, and Schluter
Systems (Canada) Inc. shall provide the warranty for all products for end users located in Canada. This warranty is limited to sales of the Products made in
and intended for use in the United States and Canada.
**Schluter®-DITRA-HEAT System (“the Products”): The products are defined to include Schluter®-DITRA-HEAT matting and DITRA-HEAT heating cables.
WARRANTY
27
© 2015 Schluter Systems L.P.
04/2015
www.schluter.com
554508
Schluter Systems L.P. • 194 Pleasant Ridge Road, Plattsburgh, NY 12901-5841 • Tel.: 800-472-4588 • Fax: 800-477-9783
Schluter Systems (Canada) Inc. • 21100 chemin Ste-Marie, Ste-Anne-de-Bellevue, QC H9X 3Y8 • Tel.: 800-667-8746 • Fax: 877-667-2410
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