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The sub-flooring surface
must be fully cured and washed with successive rain or wash waters
to remove all excessive chemical materials used to form or cure the
surface (alkali, soaps, emulsifiers, oil substances). Proper curing
time will range from 45 - 60 days after sub-flooring installation.
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The sub-flooring surface
must be thoroughly cleaned which should include sweeping, vacuuming
and mopping to insure that all dirt, paint, grease, oils or any
contaminants which will prevent good adhesion are removed.
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The carpet should be
allowed to lay out unrolled and allowed to relax at least one hour
before installation. Ideal temperature for the installation to take
place is 55 degrees Fahrenheit to 95 degrees Fahrenheit, and the
relative humidity should fall between 10% and 65%.
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The carpet should be
pre-cut for each area allowing some excess for proper seaming and
edging or any trimming necessary.
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The adhesives should be
stored in an area that maintains a temperature between 65 degrees
Fahrenheit and 85 degrees Fahrenheit. The adhesive should be spread
on the sub-flooring surface that covers an area approximately
one-half the actual size of the carpet strip being glued.
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The adhesive should be
applied using 1/8 x 1/8 x 1/8 V-notched trowel for smooth backed or
action-backed carpets and a 1/8 x 1/8 x 1/8 U- or Square-notched
trowel for rough backed unitary carpets. The 1/8 V-notched should
apply approximately 10 - 12 yards per gallon, whereas the 1/8 U- or
Square-notch will apply 7 - 9 yards per gallon. Of course, the
variations in the sub-floor surface will effect the final coverage
rate.
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The adhesive should be
applied and allowed to air dry for 15 - 30 minutes before laying the
carpet. The opening air dry time will vary with temperature,
barometric pressure and air flow (wind) around the installation
area. "DO NOT COVER MORE SURFACE AREA THAN CAN BE EFFECTIVELY
WORKED."
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Once the carpet has been
properly joined to the sub-floor, the entire area should be rolled
using 50 - 75 pound roller for unitaries or action backed carpets
and a 35 pound roller for urethane cellular attached form backed
carpets. The floor covering should be rolled in both E-W, N-S
directions to assure proper bond.
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All carpet seams should
be sealed by placing a 1/8 inch bead of seam sealer (nonflammable)
at the interface of the carpet fiber and the primary-secondary
backing. The two carpet edges should be butted together to
assure even placement and complete seam sealing. The seam sealer can
prevent tuft lose, raveling, and even waterproof the carpet seam
edges.
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In the event a bubble
should develop, do not ever cut or slit open the raised area or
bubble. Most bubbles are caused from solvents left in the adhesive
and trapped under the carpet during lay-in. The best way to remove
and correct these bubbles is to puncture the bubble with an awl, ice
pick or hypodermic syringe and press the trapped solvent gas vapors
out of the bubble by pressing and squeezing the area with both
hands. Allow the carpet to lay back into the adhesive and either
sand bag or re-roll the area to develop maximum bond strength.
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If, for some reason, the
bubble does not re-bond adequately, the hypodermic syringe can be
used with a small quantity of the seam sealer to re-bond the carpet
to the floor. After the seam sealer has been injected into the
bubble, spread the sealer by hand rubbing and then allow it to air
dry for 5 - 10 minutes before rolling.