Historic Preservation - Technical Procedures
Installing Carpet Tiles
The Old Customs House - Gsa/Pbs
Installing Carpet Tiles
INSTALLING CARPET TILES
A. This procedure includes guidance on preparing floor
surfaces for carpet installation and installing carpet
tiles and accessories.
B. Carpeting is a popular and commonplace floor finish,
often obscuring original floor materials in GSA
buildings. Typical original finishes covered could
include wood plank, wood block, cork, vinyl tile and
stone floors. Carpet tiles are a contemporary product
which has, in some areas, gained favor over roll carpet.
Carpet tiles are increasingly used in historic buildings
and this procedure addresses their installation.
C. See 01100-07-S for general project guidelines to be
reviewed along with this procedure. These guidelines
cover the following sections:
1. Safety Precautions
2. Historic Structures Precautions
4. Quality Assurance
5. Delivery, Storage and Handling
6. Project/Site Conditions
7. Sequencing and Scheduling
8. General Protection (Surface and Surrounding)
These guidelines should be reviewed prior to performing
this procedure and should be followed, when applicable,
along with recommendations from the Regional Historic
Preservation Officer (RHPO).
1.02 SYSTEM DESCRIPTION
A. Performance Requirements: Carpeting to comply with the
a. Ignition and Surface Flammability: Comply
with DOC FF-1-70 (Pill Test).
b. Flame Spread: Minimum critical radiant flux
of 0.25 watts/sq. cm. with a 10% negative
variance when evaluated in accord with NFPA
253 (NBSIR 75-950) (Flooring Radiant Panel
Test). Class B (75 or less when evaluated in
accord with ASTM E-84-70 (Steiner Tunnel
c. Smoke: Maximum optical density of 450 when
evaluated in accord with NFPA 258 (NBS Smoke
a. To Light: Minimum International Gray Scale
Rating of 4 (slight break) for light shades
after being subjected to equivalent of two L-4
breaks and of 4 (slight break) for dark shades
after being subjected to equivalent of three
L-4 breaks, visually evaluated. L-4 breads to
be in accord with AATCC 16E. Also, fade
resistance of 80 hours when tested by the
Atlas Fadeometer in accord with AATCC test
b. To Crocking: Minimum International Gray Scale
Rating of 4 (slight break) when visually
evaluated after being subjected to 20 friction
cycles in accord with AATTC 8.
c. To Wet Cleaning: Minimum International Gray
Scale Rating of 4 (slight break) when visually
evaluated after completion of shampooing in
accord with Federal Test Method Standard 191
and FS DDD-C-0095. Also, minimum rating of
"Good" when tested in accord with FS DDD-D-
0095 and evaluated by Federal Test Method
Standard 191, Method 5610.
d. To Atmospheric Fading: Minimum International
Gray Scale Rating of 3 (moderate break) when
visually evaluated after test in accord with
e. Acoustics: NRC rating of approximately 0.45
when installed over carpet cushion when
evaluated in accord with ASTM C423.
f. Static Control: Generate a maximum of 3500
volts when evaluated in accord with AATCC 134-
75 and OHM resistance (ambient condition of
20% relative humidity and 70 degrees F. with
oak-tanned leather soled shoes).
3. Physical Strength:
a. Dry Breaking: Minimum overage strength of 100
pounds in both length and width.
b. Shrinkage: Maximum average shrinkage to be 1%
for each direction when evaluated in accord
with Federal Test Method Standard 191 and FS
4. Appearance Retention:
a. Pilling and Fuzzing Resistance: Minimum
rating of 4 when evaluated in accord with
DuPont Random Tumble Pill Test Method 609.
b. Stain Resistance: Withstand any noticeable
staining both from immediate removal, and
after minimum 24 hour aging and removal of
major staining mediums.
c. Crush Resistance: Recovered thickness to be
minimum 85% of original thickness 96 hours
after being subjected to compression of 50 psi
for 48 hours, applied with a 1-1/2" diameter
d. Abrasion Resistance: Standard of manufacture
evaluated in accord with ASTM D1175, Taber
Abrader with H-18 wheel and 1000 gram load
weight, unless otherwise indicated.
A. Product Data: Submit manufacturer's technical data for
each type of carpet tile material and installation
accessory required. Submit written data on physical
characteristics, durability, resistance to fading, and
flame resistance characteristics.
B. Shop Drawings: Submit shop drawings showing layout and
placement of cut tiles. Indicate pile or pattern
direction, start points and locations and types of edge
strips. Indicate columns, doorways, enclosing walls or
partitions, built-in cabinets, and locations where
cutouts are required in carpet tiles. Show installation
details at special conditions.
C. Samples: Samples for verification purposes in
manufacturer's standard size, showing full range of
color, texture, and pattern variations expected. Prepare
samples from same material to be used for the work.
Submit the following:
1. Full-size carpet tile of each type required.
2. 12-inch-long samples of each type exposed edge
stripping and accessory item.
D. Design Data/Test Reports/Certificates: Submit
manufacturer's certification stating that carpet
materials furnished comply with specified requirements.
E. Operation and Maintenance Data: Submit manufacturer's
printed maintenance recommendations for the care,
cleaning and maintenance of the carpet, including
detailed instructions pertaining to the cleaning and
removal of stains and burns.
1.04 QUALITY ASSURANCE
1. Installer Qualifications: Engage a carpet
installer firm, which has at least 5 years
successful experience in carpet installations
similar in size and type to the carpeting
requirements of the project.
2. Manufacturer's Representative: Obtain carpeting
tiling materials from only manufacturers who will,
when requested, send a qualified technical
representative to the project site, to advise the
installer of proper installation procedures.
B. Measurement Verification: Order sufficient carpet tile
to fully cover area as indicated and to fill overage
requirements as specified.
1.05 DELIVERY, STORAGE AND HANDLING
A. Packing and Shipping: Deliver materials to project site
in original factory wrappings and containers, labeled
with identification of manufacturer, brand name, and lot
B. Storage and Protection: Store materials in original
undamaged packages and containers, inside well-ventilated
area protected from weather, moisture, soilage, extreme
temperatures, and humidity. Lay flat, blocked off
ground. Maintain minimum temperature of 68 degrees F (20
degrees C) at least three days prior to and during
installation in area where materials are stored.
1.06 PROJECT/SITE CONDITIONS
A. Environmental Requirements: Maintain temperatures in
space in accordance with carpet manufacturer's
recommendations, but in no case less than 60 degrees F
for 24 hours prior to, during and after installation.
Permit no traffic over newly laid carpet for a minimum of
24 hours after installation.
A. Lees Commercial Carpet Co.
B. Bigelow-Sanford, Inc.
C. Interface Flooring Systems, Inc.
A. Carpet Edge Guard.
B. Installation Adhesive: Water resistant and nonstaining
as recommended by carpet manufacturer to comply with
flammability requirements for installed carpet tile.
C. Miscellaneous Materials: Provide other accessory items
recommended by the carpet tile manufacturer for the
conditions of installation and use, without failure
during the life of the carpet tiling.
D. Protection Covering: Non-staining reinforced sisal-kraft
paper, as recommended by protection covering
A. Examine the substrate and conditions under which carpet
tiling is to be installed. Do not proceed with the work
until unsatisfactory conditions have been corrected.
A. Measuring: Measure each space to receive carpet tiling,
as a basis of supplying, and installing the modules.
B. Substrate Surface: Ensure that substrate surfaces are of
smoothness acceptable for the modules installation.
C. Cleaning: Vacuum and wet mop substrate immediately prior
to the modules installation, and remove all deleterious
substances which would interfere with the installation or
be harmful to the work.
D. Patch holes and level to a smooth surface. If previous
finish is chemically stripped, reseal concrete. Seal
powdery or porous surfaces with sealer recommended by
3.03 ERECTION, INSTALLATION, APPLICATION
A. Comply with manufacturer's recommendations for seam
locations and direction of carpet; maintain uniformity of
carpet direction and lay of pile.
1. Determine the center of the room using standard
tile laying methods. The center chalk lines,
dividing the room into quadrants, should be off-
center, if necessary, to ensure that perimeter
modules will be half-size or larger.
2. At doorways, center seams under door in closed
position; do not place seams perpendicular to door
frame, in direction of traffic through doorway. Do
not bridge building expansion joints with
B. Adhere perimeter and cut tiles, tiles in high traffic
areas with a full spread of adhesive. All remaining
tiles shall be loose laid. Butt carpet edges tightly
together to form joints without gaps. Maintain straight
joints, true with lines of building. Roll entire carpet
area lightly to eliminate air pockets and ensure uniform
bond. Remove adhesive promptly from face of carpet.
C. Extend carpet tile under removable flanges and
furnishings and into alcoves and closets of each space.
D. Provide cutouts where required, and bind cut edges where
not concealed by protective edge guards or overlapping
E. Install carpet edge guard where edge of carpet tile is
exposed; anchor guards to substrate.
F. Install with pattern parallel to walls and borders.
Perimeter modules shall be half size or larger.
G. Dry-fit sections of carpet tile prior to application of
H. Apply adhesive uniformly to substrate in accordance with
manufacturer's instructions. Butt edges tight to form
seams without gaps.
A. Remove adhesive from carpet tile surface with
manufacturer's recommended cleaning agent.
B. Remove and dispose of debris and unusable scraps. Vacuum
with commercial machine with face-beater element. Remove
soil. Replace carpet where soil cannot be removed.
Remove protruding face yarn.
C. Following cleaning and vacuum, carefully protect the
carpeting from soiling and damage until final acceptance.
Protection shall be accomplished by using building paper.
Edges shall be lapped 6 inches and secured with non-
asphaltic construction and move-in period.
A. Provide final protection and maintain conditions, in a
manner acceptable to manufacturer and installer, to
ensure carpet tile is not damaged or deteriorated at time
of Substantial Completion.
END OF SECTION