Fireplace tile

Hi Jake, I have a natural gas fireplace insert with about 10 granite tiles surrounding it. There is a firmly secured mantle surrounding the granite tiles. Is it possible to install slate tiles directly over the granite ones? Would this be too heavy for a typical wall? What procedure should I use? 

Thank you, 

Holly

Holly,

You could install the slate tiles over the granite.  Weight should not be a problem.  The best way to do it is to install a ¼” backer board over the granite, like a Hardie board.  You would screw this board to the granite and then you could install your new slate over the top of the backer board.  These boards are available in 3’ x 5’ sheets.  You can find these boards, or something equivalent, at most drywall suppliers, flooring stores or home centers.