Installation Guide

English | 8
ENVIRONMENTAL CONSIDERATIONS
HardieBacker
®
board’s proprietary cement formulation and MoldBlock
®
Technology
provide a moisture and mold-resistant wallboard and tile backer substrate that
stands tough over time, reducing the need for product replacement. James
Hardie has demonstrated a commitment to reducing energy consumption, while
improving process efficiencies and waste management. It avoids the use of
environmentally damaging materials and uses renewable resources that are
abundant in the manufacture of HardieBacker cement board. HardieBacker cement
board does not contain any glass fibers, gypsum, asbestos or formaldehyde. The
company also focuses on water conservation and attempts to recycle water and
waste product as much as possible during the manufacturing process.
RECOGNITIONS
HardieBacker cement board is recognized as an interior substrate by the following:
• International Code Council Evaluation Service ESR-2280
• City of Los Angeles Research Report No. 24862
• HUD Materials Release Nos. 1263 and 1268
• City of New York MEA No. 223-93M
• IBC 2509.2
• IRC R702.4.2
Consult these documents for additional information concerning conditions for use
in applicable jurisdictions.
*Cementitious Backer Unit/Fiber-Cement Underlayment
Compressive Strength Compressive Strength at Equilibrium Moisture Content
(ASTM D2394)
1/4 in HardieBacker EZ Grid
®
cement board: 7000 psi (48 MPa)
HardieBacker 500 cement board: 6500 psi (45 MPa)
Non-Combustibility HardieBacker cement board is recognized as non-combustible
in accordance with ASTM E136.
Surface Burning Characteristics When tested in accordance with ASTM method
E-84: Flame Spread – 0, Fuel Contributed – 0, Smoke Developed – 5.
Fire Rated Assemblies HardieBacker cement board may be used as a component
in one-hour fire-resistive wall construction; consult ESR-2280 website listings
for recognized assemblies, or contact James Hardie’s Technical Services at
1-800-9HARDIE (1-800-942-7343).
HARDIEBACKER WARRANTIES
INTERIOR APPLICATIONS
The HardieBacker cement board limited lifetime warranty covers both the
product and replacement labor for the life of the product. Download a copy of the
HardieBacker limited lifetime warranty from hardiebacker.com or obtain one from
wherever James Hardie product are sold.
EXTERIOR APPLICATIONS
James Hardie offers a limited 10 year warranty for Hardiebacker 500 cement
backerboard installed in exterior applications in HardieZone HZ10 regions only.
To find out the HardieZone designation for your ZIP code, go to HardieZone.com