093033
SECTION 093033
STONE TILING
PART 1 - GENERAL
1.1
RELATED DOCUMENTS
A.
1.2
Drawings and General Provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
SUMMARY
A.
B.
1.3
Section Includes:
1.
Dimension stone tile and related setting materials applied to floors.
2.
Stone thresholds.
3.
Crack isolation membrane.
4.
Tile backing panels.
5.
Metal edge strips.
Related Sections:
1.
Section 033000 "Cast-in-Place Concrete" for monolithic slab finishes specified
for tile substrates.
2.
Section 096340 "Stone Flooring" for stone paving and flooring other than
dimension stone tile.
DEFINITIONS
A.
Dimension Stone Tile: Modular stone units less than 3/4 inch (19 mm) thick.
B.
Module Size: Actual tile size plus joint width.
C.
Natural-Cleft Finish: Uneven surface produced by splitting stone along a natural
cleavage plane; without visible tool marks and with a gap not exceeding 3/16 inch (5
mm) when faces are tested for flatness with a 24-inch (600-mm) straightedge.
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1.4
ACTION SUBMITTALS
A.
Product Data: For each type of product indicated.
B.
LEED Submittals:
1.
Product Certificates for Credit MR 5: For products and materials required to
comply with requirements for regional materials indicating location and distance
from Project of material manufacturer and point of extraction, harvest, or
recovery for each raw material. Include statement indicating cost for each
regional material and the fraction by weight that is considered regional.
2.
Product Data for Credit IEQ 4.1: For adhesives and sealants, documentation
including printed statement of VOC content.
3.
Product Data for Credit IEQ 4.3: For adhesives and grouts, documentation
including printed statement of VOC content.
4.
Product Data for Credit IEQ 4.3: For stone tile floors, documentation from an
independent testing agency indicating compliance with the FloorScore Standard.
C.
Shop Drawings: Show locations of each type of stone tile and tile pattern. Show widths,
details, and locations of expansion, contraction, control, and isolation joints in substrates
and finished stone tile surfaces.
D.
Samples for Initial Selection: For each type of grout indicated and accessories involving
color selection.
E.
Samples for Verification:
1.5
1.
Full-size units of each type of stone tile.
2.
Range Samples consisting of at least five (5) full-size units of each type of stone
tile, exhibiting extremes of the full range of color and other visual characteristics
expected. Range Samples establish the standard by which individual stone tiles
will be judged.
3.
Metal edge strips in 6-inch (150-mm) lengths.
4.
Grout color.
CLOSEOUT SUBMITTALS
A.
Maintenance Data: For dimension stone tile to include in maintenance manuals.
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1.6
MAINTENANCE MATERIAL SUBMITTALS
A.
1.7
Furnish extra materials that match and are from same production runs as products
installed and that are packaged with protective covering for storage and identified with
labels describing contents.
1.
Dimension Stone Tile: Furnish quantity of full-size units equal to three (3%)
percent of amount installed, for each type, composition, color, pattern, and size
indicated.
2.
Grout: Furnish quantity of grout equal to three (3%) percent of amount installed
for each type, composition, and color indicated.
QUALITY ASSURANCE
A.
Supplier Qualifications: A firm experienced in supplying products similar to those
indicated for the Project and with a record of successful in-service performance.
B.
Source Limitations for Stone Tile: Obtain each stone product type through single source
from single producer.
1.
Obtain each variety of stone from same location in a single quarry with resources
to provide materials of consistent quality in appearance and physical properties.
C.
Source Limitations for Setting and Grouting Materials: Obtain ingredients of a uniform
quality for each mortar, adhesive, and grout component from single manufacturer and
each aggregate from single source or producer.
D.
Source Limitations for Other Products: Obtain each of the following products specified
in this Section from a single manufacturer for each product:
E.
F.
1.
Crack isolation membrane.
2.
Joint sealants.
3.
Cementitious backer units.
4.
Metal edge strips.
Dry-Laid Mockups: Lay out tiles in dry-laid mockups to verify selections made under
sample submittals and to demonstrate aesthetic effects and set quality standards for
materials and execution.
1.
Lay out mockup of stone floor tile installation.
2.
Maintain dry-laid mockups in an undisturbed condition until equivalent areas of
the completed Work are approved to serve as mockups.
Preinstallation Conference: Conduct conference at Project site.
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1.8
DELIVERY, STORAGE AND HANDLING
A.
Deliver and store packaged materials in original containers with seals unbroken and
labels intact until time of use.
B.
Store stone tile and cementitious materials on elevated platforms, under cover, and in a
dry location.
C.
Store aggregates where grading and other required characteristics can be maintained and
contamination can be avoided.
D.
Store liquid materials in unopened containers and protected from freezing.
1.9
PROJECT CONDITIONS
A.
1.10
Environmental Limitations: Do not install stone tile until construction in spaces is
complete and ambient temperature and humidity conditions are maintained at the levels
indicated in referenced standards and manufacturer's written instructions.
SEQUENCING AND SCHEDULING
A.
Sequence stone tile installation with other work to minimize possibility of damage and
soiling during remainder of construction period.
PART 2 - PRODUCTS
2.1
STONE PRODUCTS
A.
Varieties and Sources: Subject to compliance with requirements, provide those indicated.
B.
Regional Materials: Provide stone tiles that have been manufactured within 500 miles
(800 km) of Project site from stone that has been extracted within 500 miles (800 km) of
Project site.
C.
FloorScore Compliance:
FloorScore Standard.
D.
Abrasion Resistance of Stone Tile for Floors: Provide stone with a value of not less than
8, as determined per ASTM C 1353 or ASTM C 241.
E.
Static Coefficient of Friction of Stone Tile for Floors: Provide products with the
following values as determined by testing identical products per ASTM C 1028:
1.
Stone tile for floors shall comply with requirements of
Level Surfaces: Minimum 0.6.
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F.
Provide stone products that are free of defects impairing their function for use indicated,
including cracks, seams, and starts.
G.
Stone Tile Type:
1.
Stone Type: Slate, complying with ASTM C 629, Classification I, Exterior.
2.
Varieties and Sources:
a.
b.
Basis-of-Design: Vermont Structural Slate Co., Fair Haven, VT; variety
specified in Finish Legend on Drawings.
Other Acceptable Sources:
1)
2)
2.2
Buckingham Slate, Arvonia, VA; "Unfading Blue-Black"
(Oxford Gray).
Sheldon Slate, Middle Granville, NY; "Hampton Gray Black".
3.
Finish: Natural cleft, as indicated.
4.
Edges: Square.
5.
Module Size: As indicated.
6.
Nominal Tile Thickness: 1/2 inch (13 mm).
7.
Joint Width: 3/8 inch (10 mm).
TILE BACKING PANELS
A.
Cementitious Backer Units: ANSI A118.9 or ASTM C 1325, in maximum lengths
available to minimize end-to-end butt joints.
1.
Products: Subject to compliance with requirements, provide one of the
following:
a.
b.
2.
2.3
C-Cure; C-Cure Board 990.
Custom Building Products; Wonderboard.
Thickness: 1/4 inch (6.4 mm).
CRACK ISOLATION MEMBRANES
A.
General: Manufacturer's standard product that complies with ANSI A118.12 for standard
performance and is recommended by the manufacturer for the application indicated.
Include reinforcement and accessories recommended by manufacturer.
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B.
Fluid-Applied Membrane: Liquid-latex rubber or elastomeric polymer.
1.
Products: Subject to compliance with requirements, available products that may
be incorporated into the Work include, but are not limited to, the following:
a.
b.
c.
2.4
Bostik, Inc.; Durabond D-222 Duraguard Membrane.
C-Cure; CureLastic 949.
Custom Building Products; Redgard Waterproofing and Crack
Prevention Membrane.
SETTING MATERIALS
A.
Medium-Bed, Latex-Portland Cement Mortar:
Comply with requirements in
ANSI A118.4. Provide product that is approved by manufacturer for application
thickness of 5/8 inch (16 mm).
1.
Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
a.
b.
c.
2.
2.5
Custom Building Products.
Laticrete International, Inc.
MAPEI Corporation.
Provide prepackaged, dry-mortar mix containing dry, redispersible, vinyl acetate
or acrylic additive to which only water must be added at Project site.
GROUT MATERIALS
A.
Polymer-Modified Tile Grout: ANSI A118.7.
1.
Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
a.
b.
c.
2.
2.6
Custom Building Products.
Laticrete International, Inc.
MAPEI Corporation.
Polymer Type: Acrylic resin in liquid-latex form for addition to prepackaged
dry-grout mix.
ELASTOMERIC SEALANTS
A.
General: Provide sealants, primers, backer rods, and other sealant accessories that
comply with the following requirements and with the applicable requirements in
Section 079200 "Joint Sealants" and that do not stain stone.
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B.
Sealants shall have a VOC content of 250 g/L or less when calculated according to
40 CFR 59, Subpart D.
C.
Use primers, backer rods, and sealant accessories recommended by sealant manufacturer.
D.
Colors: Provide colors of exposed sealants to match colors of grout in stone tile
adjoining sealed joints unless otherwise indicated.
E.
One-Part, Mildew-Resistant Silicone Sealant:
ASTM C 920; Type S; Grade NS;
Class 25; Uses NT, G, A, and, as applicable to nonporous joint substrates indicated, O;
formulated with fungicide, intended for sealing interior stone tile joints and other
nonporous substrates that are subject to in-service exposures of high humidity and
extreme temperatures.
2.7
MISCELLANEOUS MATERIALS
A.
Trowelable Patching Compounds: Latex-modified, portland cement-based formulation
provided or approved by manufacturer of tile-setting materials for installations indicated.
B.
Metal Edge Strips: Angle or L-shaped, height to match stone tile and setting-bed
thickness, metallic or combination of metal and PVC or neoprene base, designed
specifically for flooring applications.
1.
Basis-of-Design Product: Subject to compliance with requirements, provide
Schluter Systems’ products or comparable product by one of the following:
a.
b.
C.
Protective Coating: Liquid grout-release coating that is formulated to protect exposed
surfaces of stone tile against adherence of mortar and grout; compatible with stone,
mortar, and grout products; easily removable after grouting is completed without
damaging grout or stone tile; and recommended for use as temporary protective coating
for stone tile.
1.
D.
Blanke Corporation.
Ceramic Tool Company, Inc.
Floor sealer complying with "Floor Sealer" Paragraph below may be used
provided it is recommended by manufacturer for use as a grout release.
Cleaner: A neutral cleaner capable of removing soil and residue without harming stone
tile and grout surfaces, specifically approved for materials and installations indicated by
stone tile producers and grout manufacturers.
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E.
Floor Sealer: Colorless, stain- and slip-resistant sealer, not affecting color or physical
properties of stone surfaces as recommended by stone tile producers for application
indicated.
1.
Manufacturers:
Subject to compliance with requirements, available
manufacturers offering products that may be incorporated into the Work include,
but are not limited to, the following:
a.
2.8
DuPont: StoneTech Professional Bulletproof sealer.
FABRICATION
A.
Facial Dimensions of Stone Tiles with Natural-Cleft Faces: Do not vary facial
dimensions from specified dimensions by more than plus or minus 1/32 inch (0.8 mm).
B.
Thickness of Stone Tiles with Natural-Cleft Finish: Do not vary average thickness of
each stone tile from specified thickness by more than plus or minus 1/32 inch (0.8 mm).
C.
Joint Surfaces: Except for specified beveled or eased edges if any, dress joint surfaces
square for full depth of stone tile.
D.
Backs of Pieces: Gage units by dressing backs of pieces smooth and flat. When tested
with a 24-inch (600-mm) straightedge, gap shall not exceed 1/32 inch (0.8 mm).
2.9
MIXING MORTARS AND GROUT
A.
Mix mortars and grouts to comply with referenced standards and with mortar and grout
manufacturers' written instructions.
B.
Add materials, water, and additives in accurate proportions.
C.
Use type of mixing equipment, mixer speeds, mixing containers, mixing time, and other
procedures to produce mortars and grouts of uniform quality with optimum performance
characteristics for installations indicated.
PART 3 - EXECUTION
3.1
EXAMINATION
A.
Examine substrates, areas, and conditions where stone tile will be installed, with Installer
present, for compliance with requirements for installation tolerances and other conditions
affecting performance of installed stone tile.
1.
Verify that substrates for setting stone tile are firm, dry, clean, and free of
coatings that are incompatible with tile-setting materials including curing
compounds and other substances that contain soap, wax, oil, or silicone, and that
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they comply with flatness tolerances required by ANSI A108.01 for installations
indicated.
2.
Verify that concrete substrates for stone tile floors installed with medium-bed
mortar comply with surface finish requirements in ANSI A108.01 for
installations indicated.
a.
b.
B.
3.2
Verify that surfaces that received a steel trowel finish have been
mechanically scarified.
Verify that protrusions, bumps, and ridges have been removed by
sanding or grinding.
3.
Verify that installation of grounds, anchors, recessed frames, electrical and
mechanical units of work, and similar items located in or behind stone tile has
been completed.
4.
Verify that joints and cracks in stone tile substrates are coordinated with stone
tile joint locations; if not coordinated, adjust joint locations in consultation with
Architect.
Proceed with installation only after unsatisfactory conditions have been corrected.
PREPARATION
A.
Fill cracks, holes, and depressions in concrete substrates for stone tile floors installed
with trowelable patching compound specifically recommended by tile-setting material
manufacturer.
B.
Lay out stone tile patterns by marking joint lines on substrates to verify joint placement at
edges, corners, doors, and other critical elements.
C.
Field-Applied Temporary Protective Coating: If indicated under stone tile type or needed
to prevent grout from staining or adhering to exposed stone tile surfaces, precoat them
with continuous film of temporary protective coating, taking care not to coat unexposed
stone tile surfaces.
3.3
STONE TILE INSTALLATION
A.
Comply with TCA's "Handbook for Ceramic Tile Installation" for TCA installation
methods specified in stone tile installation schedules. Comply with parts of the
ANSI A108 Series "Specifications for Installation of Ceramic Tile" that are referenced in
TCA installation methods specified in stone tile installation schedules, and apply to types
of setting and grouting materials used.
1.
For the following installations, follow procedures in the ANSI A108 Series of tile
installation standards for providing ninety-five (95%) percent mortar coverage:
a.
Stone tile floors in wet areas.
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b.
Stone tile floors composed of stone tiles 8 by 8 inches (200 by 200 mm)
or larger.
B.
Wipe backs of stone tiles with a damp cloth to remove dirt and dust before units are
installed.
C.
Extend stone tile work into recesses and under or behind equipment and fixtures to form
complete covering without interruptions unless otherwise indicated. Terminate work
neatly at obstructions, edges, and corners without disrupting pattern or joint alignments.
D.
Accurately form intersections and returns. Perform cutting and drilling of stone tile
without marring visible surfaces. Carefully grind cut edges of stone tile abutting trim,
finish, or built-in items for straight aligned joints. Fit stone tile closely to electrical
outlets, piping, fixtures, and other penetrations so plates, collars, or covers overlap stone
tile.
E.
Finish cut stone tile edges that will not be concealed by other construction by grinding
and honing cut surfaces to match factory-fabricated edges.
F.
Jointing Pattern: Lay stone tile in grid pattern unless otherwise indicated. Lay out stone
tile work and center stone tile fields in both directions in each space or on each wall area.
Lay out stone tile work to minimize the use of pieces that are less than half of a tile.
Provide uniform joint widths unless otherwise indicated.
G.
Mix stone tiles to achieve a uniformly random distribution of color shadings and patterns.
H.
Expansion Joints: Provide expansion joints and other sealant-filled joints, including
control, contraction, and isolation joints, where indicated. Form joints during installation
of setting materials, mortar beds, and stone tile. Do not saw-cut joints after installing
stone tiles.
I.
3.4
1.
Where joints occur in concrete substrates, locate joints in stone tile surfaces
directly above them.
2.
Prepare joints and apply sealants to comply with requirements in Section 079200
"Joint Sealants".
Metal Edge Strips: Install at locations indicated and where exposed edge of stone tile
flooring meets carpet, wood, or other flooring that finishes flush with or below top of
stone tile and no threshold is indicated.
TILE BACKING PANEL INSTALLATION
A.
Install cementitious backer units at raised access floor.
1.
Apply duct tape to joints of raised access floor prior to installation of backer
units.
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B.
3.5
Install panels and treat joints according to ANSI A108.11 and manufacturer's written
instructions for type of application indicated. Use latex-portland cement mortar for
bonding material unless otherwise directed in manufacturer's written instructions.
CRACK ISOLATION MEMBRANE INSTALLATION
A.
Install crack isolation membrane at concrete subfloors (other than raised access floor) to
comply with ANSI A108.17 and manufacturer's written instructions to produce
membrane of uniform thickness and bonded securely to substrate.
B.
Do not install tile or setting materials over crack isolation membrane until membrane has
cured.
3.6
INSTALLATION TOLERANCES
A.
Variation in Surface Plane of Flooring: Do not exceed 1/8 inch in 10 feet (3 mm in 3 m)
from level or slope indicated when tested with a 10-foot (3-m) straightedge.
B.
Variation in Plane between Adjacent Units (Lipping): Do not exceed the following
differences between faces of adjacent units as measured from a straightedge parallel to
stone tiled surface:
1.
C.
3.7
Units with Natural-Cleft Faces: Depth of natural-cleft finish or 3/16 inch (5
mm), whichever is less.
Variation in Joint Width: Do not vary joint thickness more than 1/16 inch (1.6 mm) or
one-fourth of nominal joint width, whichever is less.
ADJUSTING AND CLEANING
A.
Remove and replace material that is stained or otherwise damaged or that does not match
adjoining stone tile. Provide new matching units, installed as specified and in a manner
to eliminate evidence of replacement.
B.
Cleaning: On completion of placement and grouting, clean stone tile surfaces so they are
free of foreign matter.
1.
Remove latex-portland cement grout residue from stone tile as soon as possible.
2.
Clean grout smears and haze from stone tile according to stone tile and grout
manufacturer's written instructions but no sooner than ten (10) days after
installation.
Use only cleaners recommended by stone tile and grout
manufacturers and only after determining that cleaners are safe to use by testing
on samples of stone tile and other surfaces to be cleaned. Protect metal surfaces
and plumbing fixtures from effects of cleaning. Flush surfaces with clean water
before and after cleaning.
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3.
C.
3.8
Remove temporary protective coating by method recommended by coating
manufacturer and acceptable to stone tile and grout manufacturer. Trap and
remove coating to prevent drain clogging. Do not remove floor sealer if used as
protective coating.
Apply sealer to cleaned stone tile flooring according to sealer manufacturer's written
instructions.
PROTECTION
A.
Protect installed stone tile floors with kraft paper or other heavy covering during
construction period to prevent staining, damage, and wear. If recommended by stone tile
manufacturer, apply coat of neutral protective cleaner to completed stone tile walls and
floors.
B.
Prohibit foot and wheel traffic from stone tiled floors for at least seven (7) days after
grouting is completed.
C.
Before final inspection, remove protective coverings and rinse neutral protective cleaner
from stone tile surfaces.
3.9
INTERIOR STONE TILE INSTALLATION SCHEDULE
A.
Interior Floor Installations, Concrete Subfloor:
1.
Stone Tile Installation F125A: Thin-set mortar on crack isolation membrane;
TCA F125A.
a.
b.
B.
Thin-Set Mortar: Medium-bed, latex- portland cement mortar.
Grout: Polymer-modified sanded grout.
Interior Floor Installations, Cement Backer Unit (on Raised Access Floor Subfloor):
1.
Stone Tile Installation F144: Thin-set mortar on cementitious backer units or
fiber-cement underlayment; TCA F144.
a.
b.
Thin-Set Mortar: Medium-bed, latex- portland cement mortar.
Grout: Polymer-modified sanded grout.
END OF SECTION
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