On Fri, Oct 28, 2011 at 8:11 PM, Karl Vacek <kvacek@ameritech.net> wrote:
> Any advice will be appreciated.
Not advice, per se, but thoughts...
I'd use a hard backerboard, and I'd put the thinset down. Your goal
should be to make a surface that doesn't flex; so you need the
gap-filling of the thinset to make sure there aren't any voids under
the board. If it's a slab in contact with the ground, I'd use the
moisture-proof board (I think it's green around here). A stout board
will make up the height easily and flex less.
Jeff Scarbrough
Corrosion Acres, Ga.
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