HardieBacker 1/4 in. cement board for floors and countertops is America's best selling 1/4 in. backer board. Produced with James Hardie's proprietary cement formulation, this no-mesh board cuts easily, even in tight, awkward spaces. HardieBacker cement board is available in a 3 ft. x 5 ft. and 4 ft. x 8 ft. size; the 3 ft. x 5 ft. sheet features the exclusive EZ Grid recessed fastener pattern to make installation even easier. HardieBacker cement board provides superior protection against underlayment moisture damage and mold growth.