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    Substitute white non-combustible board above 6000cl unit with cement board?

    I am getting ready to add the El Dorado Stone veneer to the wall surround around my gas fireplace. I had the 6000 CL installed and then used Perma base cement board around the entire wall framing which is flush with the white non-combustible board attached to the unit. I was trying to do some...
  2. R

    permabase--seen both OK and not on the site

    HI I am building an alcove which will have 1" air gap convection wall covered with tile for a Lopi Patriot stove. The contractor picked up Permabase from the local lumberyard. I read here both that perm abase is OK and not Ok because of the polystyrene. Should I stop the project and have only...