Installation Guide

English | 4
FINISHING WITH TILE
1. Refer to ANSI A108 and the mortar
and tile manufacturers’ published
application guidelines for complete
tiling instructions.
2. Wipe the surface of HardieBacker
®
cement board clean with a damp
sponge just prior to adding mastic
or mortar.
3. Spread the mastic or mortar with a notched trowel (Note: Please see “Materials
Required” to see which setting material is required for your application).
4. Twist or press and beat in tiles complying with ANSI A137.1.
5. Allow a minimum of 24 hours curing set time before grouting.
FINISHING WITH NATURAL STONE
Natural stone often has hidden weaknesses which can result in surface cracks in
finished floors. To reduce the risk of job failures, always consult The Marble Institute of
America Handbook.
In addition to the steps outlined under “Floor Installation,” the following is required:
• Always follow the recommendations of the flooring material manufacturer.
• Marble and natural stones must have sufficient flexural strength for use in
flooring systems.
*
Where the quality and strength of the stone is unknown, the
floor must be engineered not to exceed the L/720 deflection criteria, including
live and dead design loads, for the specific joist spacing used. The strength
of your natural stone will have an impact on the ultimate performance of your
flooring system.
*Testing has shown that a minimum 2900 psi is preferable for flooring application.
FINISHING WITH PAINT, WALLPAPER OR TEXTURE
(Interior Application Only)
1 | Painting or Wallpapering
Apply a drywall primer suitable for high-moisture areas, as recommended
by the paint manufacturer. Paint HardieBacker board as you would drywall. If
wallpapering, prime surface of HardieBacker board with a primer suitable for
high-moisture areas as recommended by the wallpaper manufacturer.
2 | Texturing
Texture can be applied to HardieBacker board in the same way as drywall.
STEAM ROOM APPLICATION
HardieBacker
®
board is recognized for use in residential steam rooms when installed
over conventional framing and in accordance with HardieBacker board printed
installation instructions, TCNA guidelines (Tile Council of North America Handbook,
www.tileusa.com), and local building codes. Questions and concerns regarding design
and construction should be directed to a knowledgeable professional.
‡
EXTERIOR APPLICATION
(This application has limited warranty coverage. Refer to Exterior Warranty for coverage information
on page 8)
HardieBacker 500 may be used up to a height not exceeding the lesser of: through
the second-story above grade or 30 feet above grade. The HardieBacker 500 must
be installed over sub-sheathing with a code approved water-resistive barrier, or in
accordance with the applicable code. Install flashings, clearances, and other building
practices per local code. James Hardie will assume no responsibility for water
infiltration. Use a minimum No. 11 ga. 1¾ in long roofing nails or No. 8-1¾ in long