Introduction, Materials, Installing f – USG Fiberock Underlayment and Tile Backerboard User Manual
Page 3: Do not use f, Behind ceramic tile, use d, Use 1-1/4" d
Introduction
Installing F
iberock
panels is quick
and easy. Just follow the simple
installation steps in this booklet
to create a perfect base for tile or
floor coverings.
Note:
Do not use F
iberock
panels
over concrete subfloors or over
cushion-backed vinyl.
Tools
Common tools like those shown
below are typically all that are
needed to install F
iberock
panels,
though additional, specialized
tools may be required with some
finish materials, such as tile and
natural stone.
Materials
F
iberock
Panels
–
Sizes and Packaging
–
Joint Reinforcement
Behind ceramic tile, use
D
urock
™
tile backer tape and
latex-based Type I mastic or
latex-modified thin-set mortar.
For sections that will be
painted, use paper tape and
setting-type joint compound.
–
Fasteners
Wall Application:
For steel
stud applications (20 ga. or
equivalent), use 1-1/4" or
1-5/8" D
urock
™
screws for
steel framing (or equivalent).
For wood stud applications,
use 1/4", 1-5/8" or 2-1/4"
D
urock
screws for wood
framing (or equivalent) or
1-1/2" hot-dipped galvanized
ring shank roofing nails.
Floor Application:
Use 1-1/4"
D
urock
™
tile backer screws for
wood framing (or equivalent)
or 1-1/2" hot-dipped
galvanized ring shank roofing
nails. For resilient flooring, use
minimum 1/4" crown chisel
point staples, hot-dipped
galvanized ring shank nails or
corrosion-resistant screws.
Fastener length should
be approximately equal
to combined thickness of
underlayment and subfloor.
Fasteners should not
penetrate through subfloor.
–
Floor and Wall Framing
Floor Tile Applications:
Maximum joist spacing
24" o.c. The subfloor system
should be designed with a
minimum deflection limit
of L/360 for the span. Some
finish materials may require a
more rigid subassembly
(such as large format tile
and natural stone products
L/720). In these cases, follow
the manufacturer’s minimum
requirements. The subfloor
should be APA Span-Rated
Plywood or OSB with an
Exposure 1 classification
or better with tongue and
groove or back blocked at
the unsupported edges.
3
Size
(thick x width x length)
Units (pcs.)
1/4"
x
4'
x
4'
60
1/4"
x
3'
x
5'
60
3/8"
x
4'
x
4'
60
3/8"
x
4'
x
8'
40
3/8"
x
3'
x
5'
60
1/2"
x
3'
x
5'
50
1/2"
x
4'
x
8'
30
5/8"
x
3'
x
5'
40
5/8" x 4' x 8'
24