xpwallboardhee.qxd 1/17/11 2:37 pm page 1 ... · pdf fileultrabacke rtm 1/4" cement board...
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PermaBase®
BRAND
UltraBacker TM
1/4"Cement Board Underlayment
09 28 00/NGC
PBUBsheetfinal.QXD_XPWALLBOARDsheet.QXD 1/17/11 2:37 PM Page 1
Tape & ScrewsNational Gypsum recommendsthe use of PermaBase Tape andPermaBase Screws to completeyour installation.
Description1/4" PermaBase® BRANDUltraBacker™Cement Board is used as an under-layment for ceramic tile on floors,countertops, tub decks and outdoorkitchen counters.
PermaBase UltraBacker is a rigidsubstrate made of Portland Cement,aggregate and a glass mesh and matfacer that provides an exceptionallyhard, smooth and durable surfacethat is able to withstand prolongedexposure to moisture.
1/4" PermaBase UltraBacker offers acompetitive advantage over similarproducts on the market with itspatented EdgeTech® technology.The tapered, reinforced edgedesign allows for closer nail orscrew application to the edgewhile helping prevent damage intransit and on the jobsite.
For flooring applications with 19.2"o.c. and 24" o.c. floor joists, 3/4"tongue and groove exterior gradeplywood or OSB must be used. Tilesize for floors with 24" o.c. floorjoists must be 12" x 12" or larger.
Features/Benefits� Smooth mesh and mat surfaceis 30% stronger and four timesmore rigid than competitive1/4" cement boards.
� Improved fastener holding andreinforced edges allow for closerfastening of nails or screwswithout crumbling or spinout. Is extremely durable in transitand on the jobsite.
� Cuts easily with a standard utilityknife versus specialty tools orexpensive power tools requiredto cut traditional cement boardand fiber cement board.
� The 1/4" thickness eliminatesthe need to modify adjacentthresholds when abutting tocarpet, wood flooring or othercommon flooring materials.
� PermaBase UltraBacker has thelowest water absorption rate(<4%) than other backerboardswhich ensures more open timeand a better tile bond.
� Mold and moisture resistant –will not rot, swell or disintegratewhen exposed to moisture.
� Compatible with all brands ofthinsets and grouts.
� 30-year limited warranty forinterior applications
� GREENGUARD Indoor AirQuality Certified®
HandlingRecommendationsThe advanced design of the productusing fiberglass mat/mesh technol-ogy allows for easy and straight cutswith a standard utility knife. CuttingPermaBase UltraBacker with powertools is not recommended. Due tothe fiberglass, dust and glass fibersmay be released during normalhandling and installation whichcould result in eye or skin irritation.Whenever possible, avoid contactwith the skin and eyes and avoidbreathing dust or fibers that may bereleased during handling/instillation.Consult the MSDS for this product,available at permabase.com.
PermaBase®BRAND UltraBacker TM
1/4" Cement Board Underlayment
111101 Rev. 1/11
Corporate Headquarters
National Gypsum Company2001 Rexford RoadCharlotte, NC 28211
Phone: (704) 365-7300Web: nationalgypsum.com
nationalgypsum.com/espanol
Technical Information
Phone: (800) NATIONAL(800) 628-4662
Fax: (800) FAX-NGC1(800) 329-6421
COMPARISON CHART1/4" PermaBase 1/4" FiberUltraBacker Cement
Moisture absorption when tested according to ASTM C 473 <4% 25%
Permitted for use in exterior applications Yes No
Easily cut with standard utility knife Yes No
Organic cellulose fiber reinforcement No Yes
Recommend wiping entire surface of board with damp sponge prior to applying setting compounds. No Yes
Flame Spread/Smoke Dev. ASTM E 84 0/0 0/5
Fiberglass Mesh Tape(Alkali Resistant)
Cabinet
Countertop
Floor Underlayment
Plywood
Latex-PortlandCement Mortar
Latex-PortlandCement Mortar
PermaBaseUltraBacker
Cement Board
Tile
Tile
I-Joists3/4" Plywood
PermaBaseUltraBacker
Cement BoardLatex-PortlandCement Mortar
Fiberglass Mesh Tape(Alkali Resistant)
Latex-PortlandCement Mortar
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