Hardiebacker Cement Board Fireplace

Formaldehyde gypsum paper facing abrasive aggregate hardiebacker cement board is used as a moisture and mold resistant substrate that protects the integrity.

Hardiebacker cement board fireplace.

Hardiebacker boards are recognized as non combustible when tested according to astm e 136. Yes hardiebacker 1 4 cement board is deemed noncombustible when tested to astm e 136 and can be used in conjunction with other noncombustible materials around a fireplace. Can i use hardiebacker cement. Instead it was designed to be a subfloor or backing material for another material installed on top of it.

Hardiebacker cement board is a portable fiber cement backer board that is composed of 90 portland cement and sand 10 cellulose fibers and proprietary additives to enhance performance. Here is an excerpt from the hardie backer board page on their site. Yes hardiebacker board can be used as a fireplace facing. I am working to attach hardiebacker non combustible right to a cmu wall that surrounds around our fireplace insert.

Can i use hardiebacker board as a fireplace facing. Hardiebacker cement board is a tile underlayment made to use with floors and countertops. Around a fireplace you can use hardiebacker board to prepare an area for tile installation either stone or ceramic. The rest of the wall has drywall installed over 1x wood sleepers that are glued to the cmu.

Hardiebacker board is not designed to take the place of stone drywall or other materials used near or on your fireplace. I want to install the hb on the same plane as the drywall and then mud tape and texture the whole wall so the hb portion is indistinguishable from the drywall portion. Works in kitchens bathrooms or other areas within the home. I have lined at the time of writing over 100 fireplaces with hardiebacker over a five year period and have never had a customer complaint aside from a few small spider cracks sorted with decorator s caulking.

This does not mean that clearances to combustible building materials can be reduced by using hardiebacker 1 4. 0 25 cement board is made of 90 portland cement and sand resists damage from moisture and provides excellent tile adhesion. Hardiebacker 1 4 board can be used as a component in a 1 hour fire resistive construction when installed in compliance with national evaluation report ner 405.