What do I need to lay flag stone on a stove Hearth over cement board 1 in. Stone [Archive]

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bigmoe44

Apr 18, 2010, 04:57 PM

I'am building a 20sq. ft. raised hearth for a woodstove. I put down 3/4 plywood. I'am going to put down cement board for fire code. What do I need to lay 1 in. flagstone over this./ mortor mix/ sand?

carpenter-t

Apr 20, 2010, 04:44 PM

Mortor mix should be OK if the hearth has'nt got any flex to it.thin set may work also.