PermaBase® Cement Board

PermaBase® BRAND Cement Board is a rigid substrate made of Portland cement, aggregate and glass mesh that provides an exceptionally hard, durable surface that is able to withstand prolonged exposure to moisture.

Stocked in 3×5’x1/4″, 3×5’x1/2″, 4×8’x1/2′


    • Lifetime Limited Warranty on PermaBase Interior Applications.
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    • 15-Year Limited Warranty on PermaBase Exterior Applications.
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    • 30-Year Limited Warranty on PermaBase Interior Commerical Applications.
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    • Reinforced edge with EdgeTech technology allows for closer fastener application of nails or screws at the edge without crumbling or spinout.
    • IRC and IBC 2006 Compliant – Meets ASTM C 1325.
    • Resists the growth of mold per ASTM D 3273 with a score of 10, the best possible score.


  • Can be cut utilizing a standard utility knife and straight edge. With PermaBase’s unique core composition, little or no additional labor is needed to clean the edge after a cut.
  • PermaBase is impact resistant, extremely durable and dimensionally stable. It has excellent overall flexural, compressive, and tensile strength characteristics.
  • PermaBase is highly moisture resistant, and will not rot, disintegrate or swell when exposed to water.
  • 1/2″ PermaBase may be used in 1 hour and 2 hour rated assemblies and is UL Classified.
  • PermaBase has a smoother finish than other brands and has no open edges, which reduces hand chafing.
  • Lowest water absorption of any cement board per ASTM C 473.


  • Suitable for both interior and exterior applications.


PermaBase is ideally suited as an underlayment or backing surface for tub and shower surrounds, countertops, flooring and a variety of other interior and exterior applications.