HardieBacker is made out of cement and allows for proper bonding of the board and tile. It does not rot, swell, or delaminate like plywood even in the wettest conditions. Protect your tiles with HardieBacker 6mm, the UK’s number 1 engineered tile backerboard for floors. It is robust, rigid, dimensionally stable, and provides a flat tiling surface. It is also water and mould resistant and requires no priming. It is A1 fire rated. Hardiebacker 250 fibre cement tile backer board is designed for use on floors and countertops. This strong, water-resistant, no mesh fibre cement board offers excellent protection against moisture damage and mould growth and can hold up to 200kg/m2. Lightweight and easy to cut, it has a unique EZ Grid ¾ recessed pattern for quick installation.