Installation Guide

7 | English
MATERIALS REQUIRED
1| Mortar
For floors:
• Latex or acrylic modied thinset
(complying with ANSI A118.4).
• Dry-set mortar for use between
suboor and cement board only
(complying with ANSI A118.1).
For walls and countertops:
• Latex or acrylic modied thinset
(complying with ANSI A118.4).
• Type 1 mastic (complying with ANSI
A136.1). (Not to be used in exterior
applications)
• For Exterior applications follow
stone and mortar manufacturers
recommendations.
2 | Tape
• 2” wide high-strength alkali-resistant
glass ber tape.
3 | Fasteners
For floors and walls:
• Minimum 1-1/4” (for interior)
& 1-3/4" (exterior walls) long
corrosion-resistant roong nails.
• Minimum 1-1/4” (for Interior) &
1-3/4" (exterior walls) long No. 8
x 0.375” HD self-drilling corrosion-
resistant ribbed waferhead screws.
• If compliance with ANSI A108.11 is
not required, minimum 1” long No. 8
x 0.323” HD self-drilling corrosion-
resistant ribbed buglehead screws
may be used for oors.
1/4” HardieBacker
®
cement board:
Sheet size: 3’ x 5’ (EZ Grid
®
board) and
4’ x 8’
Thickness: 1/4”
Weight: 1.9 lbs. psf (9.3 kg/m2) Complies
with ASTM C1288 & ANSI A118.9
HardieBacker
®
500 cement board:
Sheet sizes: 3’ x 5’ and 4’ x 8’
Thickness: 0.42”
Weight: 2.6 lbs. psf (12.7 kg/m2)
Complies with ASTM C1288 & ANSI A118.9
WARNING AVOID BREATHING SILICA DUST:
James Hardie
®
products contain respirable
crystalline silica, which is known to the State of
California to cause cancer and is considered by
IARC and NIOSH to be a cause of cancer from
some occupational sources. Breathing excessive
amounts of respirable silica dust can also cause a
disabling and potentially fatal lung disease called
silicosis, and has been linked with other diseases.
Some studies suggest smoking may increase
these risks. During installation, use ber cement
shears for cutting or, use score & snap technique.
During clean-up, use HEPA vacuums or wet
cleanup methods—never dry sweep. For further
information, refer to our installation instructions
and Material Safety Data Sheet available at www.
jameshardie.com or by calling 1-800-9HARDIE
(1-800-942-7343). FAILURE TO ADHERE TO
OUR WARNINGS, MSDS, AND INSTALLATION
INSTRUCTIONS MAY LEAD TO SERIOUS
PERSONAL INJURY OR DEATH.
BK050905
BASIC COMPOSITION
90% Portland cement and sand with
selected additives. Contains no asbestos,
formaldehyde, gypsum, paper facing, or
abrasive aggregate.
• If applying HardieBacker 500 cement
board over gypsum, use minimum 1-3/4”
long corrosion-resistant roong nails.
For countertops:
• Minimum 3/4” long corrosion-resistant
roong nails.
• Minimum 3/4” long ribbed counter
sinking corrosion-resistant screws.
• 18-gauge corrosion-resistant polymer
coated 3/4” staples with a 1/4” crown.
••For HardieBacker 500 cement board,
use minimum 1-1/4” long corrosion-
resistant roong nails or ribbed
countersinking screws.
For vinyl and resilient flooring: (Interior Only)
• Minimum 7/8” long galvanized or polymer-
coated 18-gauge chisel point staples with
1/4” crown.
• Minimum 7/8” long galvanized ring
shanked nails.
• Fasteners should be long enough to
reach the bottom of the suboor, but not
penetrate it.
• Avoid using resin, rosin or cement-coated
fasteners that can discolor vinyl ooring.
HardieBacker
®
board
delivers more compressive
and exural strength than
any board on the market.