Mastic or Thinset ?? [Archive] - Ceramic Tile Advice Forums - John Bridge Ceramic Tile


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02-26-2008, 04:39 PM
I'm using a 12x12 concrete tile over Hardi Backer WALLS.

Should I be using thinset or a Mastic?

and what size trowel? 1/4 x 1/4 or 1/2?

I searched and did not find a similar post, if it exists please point me there.



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02-26-2008, 05:11 PM
Sam -

Modified thinset and a 3/8"deepX1/4"wide trowel will do ya'. Backbutter those tiles, too.

02-26-2008, 05:16 PM
Pre-moisten the Hardi as well using a spray bottle or wet sponge. Bone dry Hardi will suck too much moisture from fresh thin-set and you'll end up with a very poor bond.