I am tiling my new fireplace, and at one end had to bolt a 2x4 to make the
thing symmetrical. The rest of the surface is clay brick covered with
concrete patching to give an even surface, and I intend to tile directly on
top of that. My question is, can I tile straight onto the 2x4, or do I need
to add a backerboard of some kind. I know the easier answer is to say add
it, but is it really necessary?
BTW, the wood is nowhere near the heat source - it's about 3' from the side
of the fireplace opening.