Hardiebacker Cement Board Fireplace

Here is an excerpt from the hardie backer board page on their site.

Hardiebacker cement board fireplace.

Can i use hardiebacker cement. 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. I am working to attach hardiebacker non combustible right to a cmu wall that surrounds around our fireplace insert. Yes hardiebacker board can be used as a fireplace facing.

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. Hardiebacker cement board is a tile underlayment made to use with floors and countertops. 0 25 cement board is made of 90 portland cement and sand resists damage from moisture and provides excellent tile adhesion. This does not mean that clearances to combustible building materials can be reduced by using hardiebacker 1 4.

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 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. Works in kitchens bathrooms or other areas within the home. Can i use hardiebacker board as a fireplace facing.

Yes hardiebacker board can be used as a fireplace facing. 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. 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. The cement board is smooth one side smooth one side slightly textured and can be painted with bog standard emulsion.

Instead it was designed to be a subfloor or backing material for another material installed on top of it. Hardiebacker boards are recognized as non combustible when tested according to astm e 136. 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.