Bruce SAMHDM9L401 Revolutionary Rustics Maple Rich Umber 3/4 in. T x Varying W x Varying L Solid Hardwood Flooring (24 sq.ft./case) Installation Guide

Bruce SAMHDM9L401 Revolutionary Rustics Maple Rich Umber 3/4 in. T x Varying W x Varying L Solid Hardwood Flooring (24 sq.ft./case) Installation Guide
RECOMMENDED CLEANER: Bruce® Hardwood & Laminate Floor Cleaner
INSTALLATION INSTRUCTIONS
SOLID WOOD FLOORING
3⁄4ʺ
(19 mm) Strip and Plank
MECHANICALLY FASTENED; STAPLE, NAIL OR CLEAT APPLICATIONS
I. GENERAL INFORMATION
Owner/Installer Responsibility
Beautiful hardwood floors are a product of nature and therefore, not perfect. Our hardwood floors are manufactured in
accordance with accepted industry standards, which permit grading deficiencies not to exceed 5%. These grading
deficiencies may be of a manufacturing or natural type. When flooring is ordered, 5% must be added to the actual square
footage needed for cutting and grading allowance (10% for diagonal installations).
• The owner/installer assumes all responsibility for final inspection of product quality. Inspection of all flooring should
be done prior to installation. Carefully examine flooring for color, finish and quality before installing it. If material is not
acceptable, do not install it. Contact the seller immediately.
• Prior to installation of any hardwood flooring product, the owner/installer must determine that the job-site environment
and the sub-surfaces involved meet or exceed all applicable standards. Recommendations of the construction and
materials industries, as well as local codes, must be followed. These instructions recommend that the construction
and subfloor be clean, dry, stiff, structurally sound and flat. The manufacturer declines any responsibility for job failure
resulting from, or associated with, subfloor and substrates or job-site environmental deficiencies.
• Prior to installation, the owner/installer has final inspection responsibility as to grade, manufacture and factory finish.
The installer must use reasonable selectivity and hold out or cut off pieces with deficiencies, whatever the cause.
Should an individual piece be doubtful as to grade, manufacture or factory finish, the installer should not use the piece.
• Use of stain, filler or putty stick for touch-up and appropriate products for correcting subfloor voids is accepted as part
of normal installation procedures.
ATTENTION INSTALLERS
CAUTION: WOOD DUST
Sawing, sanding and machining wood products can produce wood dust. Airborne wood dust can
cause respiratory, eye and skin irritation. The International Agency for Research on Cancer (IARC)
has classified wood dust as a nasal carcinogen in humans.
Precautionary Measures: If power tools are used, they should be equipped with a dust collector. If high dust
levels are encountered, use an appropriate NIOSH-designated dust mask. Avoid dust contact with eye and skin.
First Aid Measures in Case of Irritation: In case of irritation, flush eyes or skin with water for at least
15 minutes.
If you have any technical or installation questions, or to request a Material Safety Data Sheet,
please call 1 800 233 3823 or visit www.floorexpert.com, our technical website.
WARNING:
EXISTING IN-PLACE RESILIENT FLOOR COVERING AND ASPHALTIC
ADHESIVES. DO NOT SAND, DRY SWEEP, DRY SCRAPE, DRILL, SAW, BEADBLAST, OR
MECHANICALLY CHIP OR PULVERIZE EXISTING RESILIENT FLOORING, BACKING, LINING
FELT, ASPHALTIC “CUTBACK” ADHESIVE, OR OTHER ADHESIVE.
These existing in-place products may contain asbestos fibers and/or crystalline silica.
Avoid creating dust. Inhalation of such dust is a cancer and respiratory tract hazard.
Smoking by individuals exposed to asbestos fibers greatly increases the risk of serious bodily harm.
Unless positively certain that the existing in-place product is a non-asbestos-containing material, you must
presume it contains asbestos. Regulations may require that the material be tested to determine asbestos content
and may govern removal and disposal of material.
See current edition of the Resilient Floor Covering Institute (RFCI) publication Recommended Work Practices for
Removal of Resilient Floor Coverings for instructions on removing all resilient floor covering structures or contact
your retailer or Armstrong Flooring Inc. 1 800 233 3823.
The floor covering or adhesive in this package does NOT contain asbestos.
Subfloor Conditions
• CLEAN – Subfloor must be free of wax, paint, oil, sealers, adhesives and other debris.
• LEVEL/FLAT – Within 3/16ʺ in 10ʹ (5 mm in 3 m) and/or 1/8ʺ in 6ʹ (3 mm in 2 m). Sand high areas or joints. Flatten
low spots with a maximum 6 layers of 15# builders felt, plywood or shims (not leveling compounds).
• DRY – Check and document moisture content of the subfloor with the appropriate moisture test. Install moisture
retardant materials if needed or desired. (See plank installation note.) Moisture retardant materials must meet
minimum perm standards of 3 > 50 ASTM D4869-88, Type I or F.S. UU-B-790a, Type I, Grade D, Style 1a. Most asphalt
saturated papers, #15 felt or Grade D kraft paper meet this perm rating. Common brown kraft builder paper and red
rosin generally do not qualify as vapor retarders. Concrete subfloors must be a minimum of 30 days old before testing
begins.
• STRUCTURALLY SOUND – Nail or screw any areas that are loose or squeak. Wood panels should exhibit an adequate
fastening pattern, glued/screwed or nailed as system requires, using an acceptable nailing pattern. Typical: 6ʺ (15 cm)
along bearing edges and 12ʺ (31 cm) along intermediate supports. Flatten any swollen edges as necessary. Replace
any water-damaged, swollen or delaminated subflooring or underlayments.
NOTE: Avoid subfloors with excessive vertical movement. Optimum performance of hardwood floor covering products
occurs when there is little horizontal or vertical movement of the subfloor. If the subfloor has excessive vertical
movement (deflection) before installation of the flooring, it is likely it will do so after installation of the flooring is
complete.
Subfloors with Radiant Heat
II. PREPARATION
NOTE: Do not install this product over Subfloors with Radiant Heat.
Storage and Handling
Tools & Accessories Needed
Solid hardwood flooring should be stored in the environment in which it is expected to perform. Deliver the materials to
an environmentally controlled site. The wood subflooring materials must not exceed 13% moisture content. Using a
reliable wood moisture meter, measure and document the moisture content of both the subfloor and the hardwood
flooring to determine proper moisture content. The difference between the moisture content of the wood subfloor and
the wood flooring must not exceed 4% (3% for plank). Acclimate the hardwood flooring on or off the job, as necessary,
to meet these requirements. Store in a dry place, being sure to provide at least a four-inch air space under cartons which
are stored upon “on-grade” concrete floors. Flooring should not be delivered until the building has been enclosed, with
windows and doors in place, and until cement work, plastering and all other “wet” work is completed and dry. Concrete
should be at least 60 days old.
NOTE: IT IS EXTREMELY IMPORTANT TO USE THE PROPER ADAPTERS, FACE PLATES, AS WELL AS STAPLES
OR CLEATS. IMPROPER FASTENERS, MACHINES AND AIR PRESSURE CAN CAUSE SEVERE DAMAGE. THE
MANUFACTURER OF THIS FLOORING PRODUCT IS NOT RESPONSIBLE FOR DAMAGE CAUSED BY USE OF IMPROPER
TOOLS OR MISUSE.
• Chalk line & chalk • Recommended hardwood flooring cleaner • Nail set • Tape measure • Hammer
• Electric power saw • NIOSH-designated dust mask • Electric drill and bits
• Compressor and hose w/in-line regulator for pneumatic tools
• “Blind’ fastening machine for 3/4ʺ (19 mm) flooring (see note below)* w/1-1/2ʺ or 2ʺ (4–5 cm) fasteners
• Pneumatic finish nailer with 1-1/ 2ʺ or 2ʺ (4–5 cm) nails • 6-8d finish nails
• Moisture meter (wood, concrete or both) • Broom • Hand saw or jamb saw
• Eye protection • Transition and wall moldings
• Urethane construction adhesive for floors wider than 4ʺ (10 cm)
Job-Site Conditions
• The building should be enclosed with all outside doors and windows in place.
All concrete, masonry, framing members, drywall, paint and other “wet” work
should be thoroughly dry. The wall coverings should be in place and the
2nd Floor
(above ground level)
painting completed, except for the final coat on the base molding. When
1st Floor
possible, delay installation of base molding until flooring installation is
Soil Line
(ground level)
complete. Basements and crawl spaces must be dry and well ventilated.
Basement
(below ground level)
• Exterior grading should be complete with surface drainage, offering a minimum
drop of 3ʺ in 10ʹ (7.6 cm in 3.05 m), to direct flow of water away from the
structure. All gutters and downspouts should be in place.
• Solid hardwood flooring may be installed on- or above- grade level. Do not
install in full bathrooms. Installation of a suitable subfloor is required over
concrete.
• Crawl spaces must be a minimum of 18ʺ (46 cm) from the ground to the
underside of the joists. A ground cover of 6–20 mil black polyethylene film is
essential as a vapor barrier with joints lapped 6ʺ (15 cm) and sealed with
moisture resistant tape. The crawl space should have perimeter venting equal
Figure 1
to a minimum of 1.5% of the crawl space square footage. These vents should
be properly located to foster cross ventilation (Figure 1). Where necessary, local
regulations prevail.
• Permanent air conditioning and heating systems should be in place and operational. The installation site should have
a consistent room temperature of 60–75° F (16–24° C) and humidity of 35–55% for 14 days prior to and during
installation and until occupied.
*Use a “Blind” nailing machine designed for installing 3/4ʺ (19 mm) hardwood flooring using
staples or cleats. The nailing machine MUST HAVE a protective foot attachment to prevent
edge bruising and finish damage. Use one of the following: Stanley Bostitch (multiple
models) with M-4 foot, Powernail (multiple models) with NailerShoe, Primatech (multiple
models) with Trak-Edge.
Protective Foot
III. SUBFLOOR/UNDERLAYMENT REQUIREMENTS
NOTE: Solid hardwood flooring can be fastened to most existing flooring materials providing they can be penetrated with the
fastener and the subfloor/underlayment materials meet or exceed the recommended subfloor/underlayment requirements.
Laminated rosin paper or 15# builders felt (tar paper) acts as a moisture retarder and may be used to reduce movement caused
by changes in subfloor moisture, thereby reducing cupping and warping. (This is especially helpful over crawl spaces and
basements.) In addition, the use of these materials can give the flooring a more solid feeling, reduce sound transfer, prevent
noise caused by minor irregularities and debris, and make it easier to slide the hardwood together across the surface of the
subfloor. Kraft paper may be used to make installation easier but DOES NOT serve any other purpose.
Wood Subfloors and Underlayment
General: The wood subflooring materials must not exceed 13% moisture content. Using a reliable wood moisture meter,
measure the moisture content of both the subfloor and the hardwood flooring to determine proper moisture content. The
difference between the moisture content of the wood subfloor and the hardwood flooring must not exceed 4% for strip
and 3% for plank flooring. When installing parallel to the floor joists it may be necessary to stiffen the subfloor system
by installing an additional minimum of 3/8ʺ (9.5 mm) approved wood underlayment. Applicable standards and
recommendations of the construction and materials industries must be met or exceeded.
NOTE: As flooring manufacturers, we are unable to evaluate each engineered joist/subfloor system. Spacing and spans,
as well as their engineering methods, are the responsibility of the builder, engineer, architect or consumer who is better
For complete warranty information call 1 800 233 3823 or visit armstrongflooring.com.
able to evaluate the expected result based on site-related conditions and performance. The general information provided
below describes common, non-engineered joist/subfloor systems. Engineered flooring joist/subfloor systems may allow
for wider joist spacing and thinner subflooring materials.
adhesives used for this purpose will not perform their function when used in
conjunction with a moisture retardant. Glue-assisted applications will not be
satisfactory without direct contact with the subfloor. The glue should be a
premium grade urethane construction adhesive applied in a serpentine
pattern to the back of the hardwood as noted in Figure 5.
Wood Structural Panel Subfloors and Underlayment
(Non-engineered)
STEP 1: Doorway and Wall Preparation
Structural panels/underlayment must be installed sealed side down. When used as a subfloor allow 1/8ʺ (3 mm)
expansion space between each panel. If spacing is inadequate, cut in with a circular saw. Do not cut in expansion space
on tongue and groove panels.
• Plywood: Must be minimum CDX grade (exposure 1) and meet US Voluntary Product Standard PS1-95 performance
standard or Canadian performance standard CAN/CSA 0325-0-92. The preferred thickness is 3/4ʺ (19 mm) as a
subfloor [minimum 5/8ʺ (16 mm)] . When using an underlayment panel a minimum 3/8ʺ (9.5 mm) thickness is
recommended.
• Oriented Strand Board (OSB): Conforming to US Voluntary Product Standard PS2-92 or Canadian performance
standard CAN/CSA 0325-0-92 construction sheathing. Check the underside of the panel for codes. When used as a
subfloor, the panels must be tongue and groove, and installed sealed side down. Minimum thickness to be 23/32ʺ
(18 mm) thick when used as a subfloor or 3/8ʺ (9.5 mm) as an underlayment. Some board manufacturers’
recommendations vary.
• Undercut door casings and jambs. Remove any existing base, shoe mold or
doorway thresholds. These items can be replaced after installation. All door
casings and jambs should be undercut to avoid difficult scribe cuts (Figure 6).
• Install the moisture retardant (if used) parallel to the flooring. Overlap the
rows 6ʺ (15 cm). Overlap (top) should be on the same side as the groove
of the flooring so that the hardwood will slide smoothly into place. Staple
the moisture retardant material as necessary to prevent excessive
movement.
Figure 5
STEP 2: Establish a Starting Point
• Installation parallel to the longest wall is recommended for best visual
effects; however, the floor should be installed perpendicular to the flooring
joists unless subfloor has been reinforced to reduce subfloor sagging.
• When possible, always begin layout or installation from the straightest wall,
generally an outside wall.
• In at least two places at least 18ʺ (46 cm) from the corner, measure out
equal distance from the starting wall (Figure 7) the face width of the starter
board plus 1ʺ (2.5 cm) (do not include the width of the tongue in this
measurement). Mark these points and snap a chalk line through them. This
measurement allows for the required 3/4ʺ (19 mm) expansion and the width
of the tongue.
Solid Wood Subfloors
• Minimum 3/4ʺ (19 mm) thick with a maximum width of 6ʺ (15 cm) installed at a 45˚ angle to the floor joists.
• Group 1 dense softwood (Pine, Larch, Douglas Fir, etc.) No. 2 common, kiln dried with all board ends bearing on joists.
Concrete (Requires Additional Subfloor)
NOTE: We do not recommend solid hardwood flooring be installed directly to concrete without the addition of other
subflooring materials to which the flooring can be fastened. Some adhesive manufacturers have had substantial success
with direct glue applications using a variety of different adhesives and moisture retardant systems. Follow the adhesive
manufacturer’s recommendations and check their warranty coverage. We will not be responsible for claims associated
with direct glue applications of our solid hardwood flooring products since we neither make nor recommend an adhesive
for that purpose.
Figure 6
Concrete Moisture Tests
STEP 3: Installing First & Second Rows –
Starting from Wall
All concrete subfloors should be tested, and results documented, for moisture content. Visual checks may not be reliable.
Test several areas, especially near exterior walls and walls containing plumbing. Acceptable test methods for subfloor
moisture content include:
• Tramex Concrete Moisture Encounter Meter (Figure 2): Moisture readings
should not exceed 4.5 on the upper scale. (Figure 2 shows an unacceptable
reading of over 4.5.)
NOTE: The following tests are required in commercial applications. Either or
both tests are acceptable.
• Calcium Chloride Test (ASTM F 1869): The maximum moisture transfer
must not exceed 3 lbs./1000 ft2 in 24 hrs. with this test.
• RH Levels in Concrete Using In-situ Probes (ASTM F 2170-02) should not
Figure 2
exceed 75%.
“DRY” CONCRETE, AS DEFINED BY THESE TESTS CAN BE WET AT OTHER TIMES OF THE YEAR. THESE TESTS DO
NOT GUARANTEE A DRY SLAB. ALL NEW CONSTRUCTION CONCRETE SLABS SHOULD HAVE A MINIMUM OF 10 MIL
POLY FILM MOISTURE BARRIER BETWEEN THE GROUND AND THE CONCRETE.
• Use the longest, straightest boards available for the first two rows. For
random and alternate width products use the widest plank for the first row.
Align tongue of first row on chalk line. The groove should be facing the
starting wall.
• Use a pneumatic finish nailer to face-nail the groove side 1/2ʺ (13 mm) from
the edge at 6ʺ (15 cm) intervals and 1ʺ–3ʺ (2.5–7.6 cm) from each end. Then,
blind nail using a finishing gun held at a 45° angle. Nail down through the
nailing “pocket” on top of the tongue every 6ʺ–8ʺ (15–20 cm) (Figure 8).
• If using finish nails, pre-drill the nail holes with a 1/32ʺ (2 mm) bit
approximately 1/2ʺ (13 mm) from back (groove) edge, 1ʺ–3ʺ (2.5–7.6 cm)
from each end, and at 6ʺ (15 cm) intervals. Pre-drill at the same intervals at
Figure 8
a 45° angle down through the nailing “pocket” on top of the tongue
(Figure 8). Face-nail the groove side where pre-drilled. When complete,
blind-nail at a 45° angle through the tongue of the first row. Fasten using 6 or 8d finish nails. Countersink nails to
ensure flush engagement of the groove. Avoid bruising the hardwood by using a nail set to countersink the nails.
• Continue blind-nailing using this method with the following rows until blind nailer can be used.
Wood/Concrete Subfloor Systems
Figure 7
STEP 2–3 Alternative: Installing First & Second Rows –
Starting from Center of Room
Fastened to concrete:
Concrete must be of high compressive strength, 3000 PSI or better. Install a suitable moisture retardant followed by a
plywood subfloor with a minimum thickness of 3/4ʺ (19 mm). Allow 1/2ʺ (13 mm) expansion space around all vertical
objects and 1/8ʺ (3 mm) between all flooring panels. In general, smaller panels [less than 4ʹ x 8ʹ (1.2 m x 2.4 m)]
oriented at 45 degrees (preferred) offer better results. The panel must be properly attached to the subfloor using a
minimum of one fastener per square foot, and more if necessary. Use pneumatic or powder actuated fasteners. Do not
hand nail the subfloor with concrete nails. Install a moisture retardant barrier with joints lapped 6ʺ (15 cm) and begin
installation of flooring using 1-1/2ʺ (4 cm) fasteners.
•
•
•
•
•
•
Floating subfloor:
Install a suitable moisture retardant followed by a plywood subfloor with a minimum of 3/8ʺ (9.5mm) [1/2ʺ (13 mm)
preferred]. Allow 1/2ʺ (13 mm) expansion space around all vertical objects and 1/8ʺ (3 mm) between all flooring panels.
Install a second layer of plywood, the same thickness, at a right angle to the previous panels, offsetting the joints 2ʹ
(61 cm). Staple together with staples that will not penetrate the first layer of the subfloor. The staples should have a
crown width of 3/8ʺ (9.5 mm) or more. Install a moisture retardant barrier with joints lapped 6ʺ (15 cm) and begin
installation of flooring using 1-1/2ʺ (4 cm) fasteners.
Snap a chalk line down the center of the room.
Install a sacrificial row that extends the entire length of the room on the centerline.
Install three rows of flooring.
Remove the sacrificial row and insert wood glue in the groove followed by a slip tongue (spline) in the exposed groove.
Always glue and nail the slip tongue in place.
Installation can now continue from the center in both directions.
STEP 4: Dry Lay (Racking) the Floor
• “Dry” lay (rack) materials to cover approximately two-thirds of the room. Begin dry laying (racking) approximately 6ʺ
(15 cm) from the edge of the previously installed rows. Avoid pulling boards too tightly together on the sides, as they
must move freely when fastening begins.
• Do not cut final board until row has been installed. Cutting the board in advance may result in a board that is too short.
• Visually inspect flooring, setting aside boards that need to have natural character flaws cut out.
• Use these boards for the starting and finishing rows after objectionable characteristics have been removed.
Screeds/sleepers:
Solid hardwood flooring 4ʺ (10 cm) and above in width cannot be installed directly to screeds. Screeds should be
installed 9ʺ (23 cm) apart, in rivers of adhesive, at right angles to the flooring to be installed. Do not begin installation
until all adhesives are properly cured. Install moisture retardant over the screeds prior to installation of the flooring.
Fastener Schedule
IV. INSTALLING THE FLOOR
Width of flooring
1-1/2ʺ to 3-1/2ʺ
(4–9 cm)
4ʺ (10 cm) and
over
Maximum spacing
10ʺ–12ʺ (25–30 cm)
8ʺ–10ʺ (20–25 cm)
Preferred spacing
8ʺ–10ʺ (20–25 cm)
6ʺ–8ʺ (15–20 cm)
General Installation Tips
• Floor should be installed from several cartons at the same time to ensure good color and shade mixture.
• When possible, preselect and set aside boards that blend best with all floor mounted moldings used to ensure a uniform
final appearance. Install these boards adjoining the moldings.
• Be attentive to staggering the ends of boards at least 4ʺ–6ʺ (10–15 cm),
when possible, in adjacent rows (Figure 3). This will help ensure a more
favorable overall appearance of the floor.
• Large spans exceeding 20ʹ (6 m) in hardwood flooring width, in areas of
high humidity, may require the addition of internal or field expansion. This
can be accomplished by using spacers, such as small washers, every
10–20 rows inserted above the tongue. Remove the spacers after several
adjoining rows have been fastened. Do not leave spacers in for more than
Figure 3
two hours.
Preferred Alignment
• When installing products of uniform length, begin the rows with starter
boards cut to various lengths. Avoid staggering the rows uniformly to
prevent stair-stepping. Boards cut from the opposite end of the row may be used for the next starter boards.
• Always allow a minimum 3/4ʺ (19 mm) expansion around all vertical obstructions.
• Always use a protective foot on the fastening machine to prevent mallet damage and edge bruising.
Figure 9
STEP 5: Installing the Floor
• Use the blind nailer to fasten a sacrificial board to the floor. Check for surface damage, air pressure setting, tongue
damage, etc., before proceeding. Make all adjustments and corrections before installation begins. Once proper
adjustments have been made, remove and destroy the board.
• Begin installation with several rows at a time. Use the fastener schedule (Figure 9) for proper spacing based on board
width. Fasten each board with a minimum of two fasteners 1ʺ–3ʺ (2.5–7.6 cm) from the ends. To ensure a more
favorable overall appearance end-joints of adjacent rows should be staggered a minimum of 4ʺ–6ʺ (10–15 cm) when
possible.
• The last 1–2 rows will need to be face-nailed where clearance does not permit blind nailing with the stapler or brad
nailer. Pre-drill and face-nail on the tongue side following the nailing pattern used for the first row.
• Rip final row to fit and face-nail. If the final row is less than 1ʺ (2.5 cm) in width, it should first be glued to the previous
UNINSTALLED row and the two joined units should be face-nailed as one.
STEP 6: Complete the Installation
General Information for “Blind Fastening” Machines
• Avoid striking the edge of prefinished products with the fastener’s mallet. Edge crushing can occur, causing unsightly
cracks and splinters. Use a protective foot attachment to prevent edge bruising and finish damage.
• Improper adapter plates and air pressure settings can cause severe damage
to the hardwood flooring and reduce performance (Figure 4). Always use an
in-line regulator to control air pressure to the machine. Set pressure at
70–75 PSI to begin with and adjust until proper fastener setting occurs.
NOTE: SPECIAL INSTRUCTIONS FOR PLANK FLOORING
Too Low Too High Correct
Seasonal distortion (shrinkage/cupping) in wide width flooring [4ʺ (10 cm)
and over] may be reduced by gluing the flooring to the subfloor, in addition to
Figure 4
the use of mechanical fasteners. The installer should be reminded that
2
• Remove all tape and clean the floor with the recommended hardwood flooring cleaner.
• Install or re-install any transition pieces, reducer strips, T-moldings, thresholds, bases and/or quarter round moldings
that may be needed. These products are available pre-finished to blend with your flooring (see below). Nail moldings
into the wall, not the floor.
• Inspect the floor, filling all minor gaps with the appropriate blended filler.
• If the floor is to be covered, use a breathable material such as cardboard. Do not cover with plastic.
• Leave warranty and floor care information with the owner. Advise them of the product name and code number of the
flooring they purchased.
• To prevent surface damage, avoid rolling heavy furniture and appliances on the floor. Use plywood, hardboard or
appliance lifts if necessary. Use protective castors/castor cups or felt pads on the legs of furniture to prevent damage
to the flooring.
INSTALLERS — ADVISE YOUR CUSTOMER OF THE FOLLOWING
V. TRANSITION AND WALL MOLDINGS
Seasons: Heating and Non-heating
Recognizing that hardwood floor dimensions will be slightly affected by varying levels of humidity within your building,
care should be taken to control humidity levels within the 35–55% range. To protect your investment and to assure that
your floors provide lasting satisfaction, we have provided our recommendations below.
• Heating Season (Dry): A humidifier is recommended to prevent excessive shrinkage in hardwood floors due to low
humidity levels. Wood stoves and electric heat tend to create very dry conditions.
• Non-heating Season (Humid, Wet): Proper humidity levels can be maintained by use of an air conditioner,
dehumidifier, or by turning on your heating system periodically during the summer months. Avoid excessive exposure
to water from tracking during periods of inclement weather. Do not obstruct in any way the expansion joint around the
perimeter of your floor.
NOTE: Final inspection by the end-user should occur from a standing position.
T-Molding
Combination
Base and Shoe
• Reducer Strip: A teardrop-shaped molding used around fireplaces, doorways, as a room divider, or as a transition
between wood flooring and adjacent thinner floor coverings. Fasten down with adhesive, small nails or double-faced
tape.
Reducer Strip
Threshold
Stair Nosing
Quarter Round
• Threshold: A molding undercut for use against sliding door tracks, fireplaces, carpet, ceramic tile, or existing
thresholds to allow for expansion space and to provide a smooth transition in height difference. Fasten to subfloor with
adhesive and/or nails through the heel. Pre-drill nail holes to prevent splitting.
• Stair Nosing: A molding undercut for use as stair landings trim, elevated floor perimeters, and stair steps. Fasten down
firmly with adhesive and nails or screws. Pre-drill nail holes to prevent splitting.
• Quarter Round: A molding used to cover expansion space next to baseboards, case goods, and stair steps. Pre-drill
and nail to the vertical surface, not into the floor.
• Combination Base and Shoe: A molding used when a base is desired. Used to cover expansion space between the
floor and the wall. Pre-drill and nail into the wall, not the floor.
• T-Molding: A molding used as a transition piece from one rigid flooring to another of similar height or to gain
expansion spaces. Fasten at the heel in the center of the molding. Additional rigid support may need to be added to
the heel of the molding dependent upon the thickness of the goods covered. Do not use this molding as a transition
to carpet.
FLOOR REPAIR
Minor damage can be repaired with a Armstrong® Flooring, Bruce® or Robbins® touch-up kit or filler. Major damage will
require board replacement, which can be done by a professional floor installer.
Armstrong and the Armstrong logo are trademarks of AWI Licensing LLC. All other trademarks are owned by Armstrong Flooring, Inc. or its subsidiaries.
© 2018 Armstrong Flooring, Inc.
Armstrong Hardwood Flooring Company
2500 Columbia Ave., Lancaster, PA 17603
Printed in the United States of America
NA-6132-818
3
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