Installation Guide
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Preparation - Underlayment and Subfloor
MATERIAL FOR THE JOB
1. Calculating MULTIPLY® Underlayment
One panel covers 16 square feet. Measure the floor and add another 5% to
10% to allow for cuts and scrap material.
2. Selecting the Fasteners
- Tight fastening is extremely important to help prevent panels from lifting
loose. Three methods are approved however staples are fast to install, lower
cost and set neatly to avoid patching indentations.
- Fastener must recess 1/16” below the surface and penetrate 75% to
- 90% of the subfloor assembly but not protrude through the bottom. Select a
coated fastener known not to stain vinyl, stone, or marble floor covering.
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Staples: |
(preferred fastener
for vinyl floors) |
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Narrow crown chisel
point staple, 7/32” or 1/4” – either |
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clear polymer coated
or galvanized. |
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Nails:
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(preferred
fastener for ceramic tile) |
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Ring shank or
annular-grooved, galvanized flooring nails with |
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a 3/16” diameter
head. Recess 1/16” and patch over. |
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Screws:
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Flathead
countersunk wood screws. |
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Do not use
drywall screws. Recess 1/16” and patch over. |
3. Using Patch / Fillers
- It is Multiply’s experience that filling or flashing joints between
panels with patch may increase the risk of tunneling and/or ridging over
these joints – use only when absolutely necessary.
- We recommend all normal panel joints be sanded and not patched. If gaps,
chips, etc. occur, use a cement-based high-solid, non-shrinking acrylic
patching compound approved by the vinyl flooring manufacturer.
Do NOT use
gypsum-based patching compounds. Use a brand name product and manufacturer’s
acrylic latex additive for improved results versus mixing with water. See
ACCLIMATION - Moisture & Movement below.
4. Safety Equipment
Warning: Wood dust can cause eye and breathing problems: wear protective
gear:
- Dust Mask
- Safety glasses or eye goggles
- Kneepads
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