Installation Instructions
Working a small area at
a time, set tile with a slight
twisting motion and press into
place. Avoid adhesive buildup
on tile edge and in grout
space. Keep tiles aligned so
joints are straight and uniform.
Use tile spacers if desired.
Note: Refer to ANSI A108.4
or A108.5 for complete tile
installation instructions.
Refer to setting material
manufacturer for specific
information related to trowel
type and size, proper tile type
and size, mixing instructions,
and set and cure times.
Resilient Flooring
Underlayment
Selecting Fasteners
Fasten USG Fiberock
underlayment to subfloor with
1/4" crown chisel point staples.
Do not use screws or nails.
Fastener length should
be approximately equal
to combined thickness of
underlayment and subfloor.
Do not allow fasteners to
penetrate through subfloor.
Fastening Panels
Lay panels flat and press tightly
onto subfloor while fastening.
Begin fastening where three
panels intersect. Ax staples
along joints in a zipper pattern
at 1" o.c., 1/4" from panel edge.
Install staples at 4" o.c. in the
field of panels.
1/4 inch
Consult your USG sales
representative for additional
fastening techniques.
When using pneumatic tools,
apply sucient pressure on
gun to prevent the tool from
bouncing. Set pneumatic tool
pressure to drive fasteners flush
or slightly below underlayment
surface. To prevent fastener
heads from telegraphing
through resilient floor covering,
do not countersink more than
1/16" below surface.
Fasten one panel at a time.
Begin at one end and fan out
across the floor.
Installing USG Fiberock
Panels over Existing Vinyl
Floor Coverings
Do not install underlayment
over heavily cushioned, thick
foam-backed vinyl. Ensure
that existing floor is level, is
fully adhered and well bonded,
and meets appropriate design
requirements. Repair missing
or broken tiles, curling seams,
severe gouges, protrusions of
surface and any other damage
with a high-quality floor
leveler. Follow floor-covering
manufacturer's
recommendations for
installations over existing
floors.
Floor Application
8