1 ULTIMATE GUIDE BE PREPARED FOR YOUR UPCOMING PROJECT
2 What are Backer Boards and Underlayments? Backer boards and underlayments are used on interior walls, floors and countertops to provide a uniform surface for adhering tile, stone, paint, wallpaper or resilient surface materials. Even though backer board and underlayment are not visible once tiled or finished, they are a critical component of your interior system. When you re building or remodeling and have an interior space that would come in contact with water, you should be installing backer board. * Most local building codes REQUIRE the use of a backerboard or underlayment under tile in wet areas such as bathtub or shower surrounds. TILE HardieBacker Cement Board THINSET SUBFLOOR Projects Where Backer Board or Underlayment Should Be Used Renovating bathroom Updating kitchen Replacing basement walls Installing fireplaces, furnaces, and steam rooms
3 Why Backer Board is Imperative Even if the wall or floor surface is tiled, it's not waterproof. If you don't install backer board, the interior of your home may be susceptible to MOISTURE Moisture can come from many sources, including plumbing leaks, an overflowing bathtub or sink, stream from a shower, pooling water or other sources. If moisture penetrates the surface of a wall, ceiling or floor and reaches the interior, the substrate can buckle, swell or deteriorate. This could leave you with an unsightly space and the need for an expensive remodel. MOLD Moisture damage can turn any room into a breeding ground for mold. Once mold spores are inside your home, they grow and thrive on the combination of: Direct exposure to moisture (from showers, steam, structural or plumbing leaks, etc.) A food source (paper, wallboard, cloth) Warm temperatures Did You Know? Water damaged areas may not be easily repairable, and may require replacement. Untreated moisture damage can ultimately cause expensive structural damage to wood studs and support beams. Standard homeowner s insurance policies rarely cover the cost of mold testing or removal. The average size mold removal costs a couple thousand dollars, but larger removal can cost well over $20,000. If mold is left untreated, it can colonize and release millions of airborne, breathable spores. While no system is completely mold proof, you can help to protect your family and home by using or requesting from your builder/contractor mold growth and moisture-resistant substrate materials.
4 Know Your Backer Board Substrate Options Not all substrates are equal! To make sure your new or existing home has the greatest mold and moisture protection built in, you should be familiar with all the various substrates. Gypsum Gypsum is a lightweight, soft mineral compound used in some backer boards. The Risk: Many building codes no longer allow some types of water resistant gypsum boards in wet areas Greenboard gypsum core susceptible to water damage Paper facing serves as food source for mold Tile size and weight limitations Lower compressive and flexural strength than cement backer boards Can t be used in steam rooms or where temperature is greater than 125º F Glass Mesh Cement Boards Glass mesh is a hard and durable substrate common in interior construction that has some moisture prevention characteristics. The Risk: Heavy with abrasive filler Typically contains fillers like fiberglass, which can reduce strength and quality Within the mesh can be messy and require significant cleanup Heavier than cement backer boards Typically require multiple cuts due to the toughness of the mesh Aggregate can scratch and damage porcelain and enamel surfaces Fiber Cement Backer Boards Experts agree that fiber cement backer boards are the best choice for wet area walls and floors because they provide the best combination of durability and installation benefits. The Reward: Flexibility of surface finish, can be tiled, painted or wallpapered. Greater flexural strength compared to gypsum, reinforced gypsum and glass mesh cement boards Greatest resistance to moisture and mold. Resistance to flame spread. Contains no added formaldehyde, gypsum, or paper facing abrasive aggregate. Approved by International Residential Code and International Building Code.
5 Backer Board Comparison HARDIEBACKER CEMENT BOARD USG DUROCK BOARD AND DUROCK NEXT GEN CUSTOM BUILDING PRODS WONDERBOARD CUSTOM BUILDING PRODS WONDERBOARD LITE NATIONAL GYPSUM PERMABASE GEORGIA PACIFIC DENSSHIELD BOARD CERTAINTEED DIAMONDBACK GLASROC USG FIBEROCK AQUA-TOUGH UNDERLAYMENT GREENBOARD Product Composition ground sand aggregate, glassfiber mesh aggregate, glassfiber mesh EPS beads, aggregates and reinforcement. aggregate, glassfiber mesh Gypsum, fiberglass mat w/acrylic coating Gypsum, fiberglass mat w/ coating Engineered gypsum fiber core Gypsum with paper facing WORKABILITY Cuts clean P O O O O P Not indicated P P Cuts easily P O O O O P P P P EZ-Grid Technology P O O O O O O O O Non-abrasive P O O O O P Not indicated P P UL Greenguard Gold Certified (low VOC/ no formaldehyde emmissions) P O O O P O P O P DURABILITY Gypsum-free P P P P P O O O O Glass fibers - free P O O O O O O P P Passes ASTM G21 and ASTM D3273 standards for mold resistance P O P P O P P O P MoldBlock Technology P O O O O O O O O ASTM E136 Non-combustible P P P O O O P O P STRENGTH Flexural Strength (psi) Compressive Strength (psi) TRUSTED 1700 (0.42") 2100 (1/4") 6500 (0.42") 7000 (1/4") Not indicated Not indicated Not indicated Not indicated Not indicated Warranty Lifetime limited; transferable (material and labor) 30-year limited; transferable Lifetime limited; non-transferable 30-year limited; transferable 30-year limited; non-transferable Lifetime limited; non-transferable Lifetime limited for residential; 20-year for light commercial 20-year limited; transferable May vary by manufacturer; non-transferable Lifetime limited; transferable (material and labor) P O O O O O Not indicated O O NAHB Green P O O O O O O O P
6 The Best Backer Board Choice: HardieBacker Cement Board HardieBacker cement board is the strongest, easiest to use, and is the most durable lightweight cement backer board on the market today. HardieBacker cement board is a portable fiber cement backer board that is composed of 90% Portland cement and sand, 10% cellulose fibers and proprietary additives to enhance performance. NO ADDED FORMALDEHYDE, GYPSUM, PAPER FACING ABRASIVE AGGREGATE HARDIEBACKER CEMENT BOARD IS USED AS A MOISTURE AND MOLD RESISTANT SUBSTRATE THAT PROTECTS THE INTEGRITY OF TILE INSTALLATION IN FLOORS, WALLS, COUNTERS AND WET AREAS BENEFITS OF HARDIEBACKER CEMENT BOARD DURABLE: Protects walls, floors, counters and wet areas from water damage. Non-combustible and approved for fire rated construction. WORKABLE: No special tools required for cutting, just score and snap upwards. Fasten with screws or nails. STRONG: Highest compressive strength. Strong enough to adhere to all sizes and types of tile. TRUSTED: The only cement board with MoldBlock Technology. The only backerboard to obtain a perfect score on both ASTM G21 and D3273 testst for mold resistance.
7 HardieBacker Cement Boards Products HardieBacker 500 Backer Board (0.42 in) Sheet sizes: 3 ft. x 5ft. and 4 ft. x 8 ft. Weight: 2.6 lbs/sq.ft. APPLICATIONS FEATURES BENEFITS FLOORS WALLS WET AREAS Nominal thickness (0.42 in.) Pre-printed fastener pattern Can be painted, textured or wallpapered No paper facing Transitions perfectly to tapered edge drywall Less guesswork, measurement Cut finishing time down Higher resistance against mold and delamination from water exposure HardieBacker ¼ in. Underlayment Sheet sizes: 3 ft. x 5 ft. and 4 ft. x 8 ft. Weight: 1.9 lbs/sq.ft. APPLICATIONS FEATURES BENEFITS FLOORS COUNTER TOPS WET AREAS EZ Grid recessed pattern EZ Grid 1 in. x 1in. Scoring guidance Facilitates layout Recessed fastener indications Easier fastening and installation
8 HardieBacker Cement Boards Resources If you have any questions on HardieBacker, please call us at HARDIE or submit your question at CERTIFICATIONS FOR MORE INFORMATION GO TO HARDIEBACKER.COM 2013 James Hardie Building Products, Inc. All Rights Reserved., SM, and denote trademarks or registered trademarks of James Hardie Technology Limited. The and the HardieBacker logo are registered trademarks of James Hardie Technology Limited. USG Durock Board and Durock Next Gen, Custom Building Products WonderBoard, Custom Building Products WonderBoard Lite, National Gypsum Permabase, Georgia Pacific DensShield Board, CertainTeed DiamondBack GlasRoc, and USG Fiberock Aqua-Tough Underlayment are registered trademarks owned by the respective entities. HBHB1318 1/14 For the mobile install guide or to have it ed to you, snap this code. Or text BACKER to 76477
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