Installation Guide

English | 4
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 nished oors. 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 ooring material manufacturer.
• Marble and natural stones must have sufcient exural strength for use in ooring
systems.* Where the quality and strength of the stone is unknown, the oor must
be engineered not to exceed the L/720 deection criteria, including live and dead
design loads, for the specic joist spacing used. The strength of your natural stone
will have an impact on the ultimate performance of your ooring 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 ashings, clearances, and other building
practices per local code. James Hardie will assume no responsibility for water
inltration. Use a minimum No. 11 ga. 1¾” long roong nails or No. 8-1¾” long
(0.375” HD) or ribbed wafer head corrosion resistant screws spaced a maximum of
8" OC. The maximum weight of the overlayment (tiles, stones and veneers) is not to
exceed the code limit of 15 lbs/sq ft. Application is limited to HZ10
®
areas only.
Follow installation procedure in accordance with the stone and mortar manufacturer’s
recommendations. ¹ Stones must be free of any substance that may impede proper
adhesion.