Durock Still Good?


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Old 10-31-05, 01:31 PM
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Durock Still Good?

I bought the Durock for my bathroom ceramic tile project about 5-6 weeks ago, but I had some other projects to finish up, so I'm just now getting to it. I completed my new subfloor (3/4" pressure treated plywood screwed and glued to sistered floor joists 16" o.c.), but now I noticed the Durock is a little warped. It has been laying flat on the floor and the sides were warped up (3' x 5' pieces-- 3/8" I think). I turned it over to let it flatten out, and it sounded crackly when I put a slight amount of pressure on the raised middle. The A/C has not been on, so at times it's been very humid in there.

Still OK to use?
 
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Old 10-31-05, 03:28 PM
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The Durock will be fine after it is set in a bed of thinset and anchored with galvanized roofing nails or backerboard screws. I think the pressure treated ply is a no-no though. It should be an exterior glue plywood(X) with a BC rating for the plys.
 
 

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