Reverso en Espanol C No ont Gy ain ps s um with MoldBlock® Technology INSTALLATION GUIDE Cement Backerboard for Walls, Floors and Countertops 90% Premium Portland Cement and Sand Backed by a Limited Lifetime Warranty © 2012 James Hardie Technology Limited. All rights reserved.TM, SM, and ® denote trademarks or registered trademarks of James Hardie Technology Limited. is a registered trademark of James Hardie Technology Limited.
Cutting HardieBacker® Board • Use a straight edge as a guide to score the board’s face and snap upward along the score line. We recommend using a carbide-tipped scoring knife, but a utility knife may also be used. The use of shears (manual, electric or pneumatic) is also acceptable. • For cutouts and small holes, score around perimeter and break out from the face side with hammer. • NEVER use high-speed power tools (e.g. saws, grinders, etc.
Floor Installation (Interior Application Only) We recommend 1/4” HardieBacker® board for floor applications, unless 1/2” thickness is needed for transition. 1 | Ensure subfloor is structurally sound On existing structures: • Ensure subfloor is not damaged. Replace any loose, warped, uneven or damaged sections of floor. • Make certain subfloor is a clean and flat surface.
Wall Installation 1 | Ensure framing is structurally sound • Must comply with local building codes and ANSI A108.11. • Use a minimum of 2” x 4” wood studs or 20-gauge metal studs, which must be straight, properly aligned and spaced a maximum of 16” on center. • In tub and shower enclosures, ensure that the framing is adequately reinforced at the corners. 2 | Determine layout of HardieBacker cement board • Boards may be installed vertically or horizontally.
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.
Skim coat is recommended to be 1/8" - 1/4" thick and the tile/stone is to be installed while the skim coat is wet. CAUTIONS: This product shall not be used in the following applications: • As a backer board in balcony railings and balcony parapet walls • HardieBacker 500 may not be used to a height exceeding through the second-story above grade or greater than 30 feet above grade. ¹ See IRC Table R703.4, IBC §2101.2 and §1405.
Underlayment Installation 1 | Determine layout of HardieBacker® cement board • Install smooth side up. • Install HardieBacker boards perpendicular to subfloor panels. • Stagger all HardieBacker board joints. Do not align HardieBacker board joints with subfloor joints • Never allow all four corners of boards to meet at one point. • Lightly butt the board joints. Do not leave a gap or force edges together. • Join factory-cut edges together in the body of the floor.
Basic Composition 90% Portland cement and sand with selected additives. Contains no asbestos, formaldehyde, gypsum, paper facing, or abrasive aggregate. 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.
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.
Contractors and do-it-yourselfers trust HardieBacker® cement board with MoldBlock® technology to deliver superior moisture and mold protection. HardieBacker board doesn’t contain any glass mesh or gypsum and its proprietary cement formulation delivers the ultimate in durability. HardieBacker board’s dimensional stability, exceptional bonding surface, and moisture resistance make it the Total Wet Area Solution™.
