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 boards are recognized as non-combustible, when tested according to ASTM E 136.