1/4"-3'x5' PERMABASE or ULTRABACKER CEMENT BOARD | 1/4" - 3' x 5' Permabase brand Ultrabacker cement board is used as an underlayment for tile on floors, countertops, tub decks and outdoor kitchen counters. It is approved for interior and exterior applications and comes with a 30-year limited interior and 10-year exterior warranty. Permabase Ultrabacker is also mold resistant and unaffected by moisture and is GreenGuard certified.
Reinforced edge with edge-tech technology
Lowest water absorption of any competitive cement board
Smooth glass mesh and mat surface provides added rigidity for improved handling
Better score and snap with standard utility knife
Improved fastener holding
1/4 in. thickness eliminates the need to modify adjacent thresholds when abutting to carpet, wood flooring or other common flooring materials