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Old 11-27-2005, 07:45 AM   #1
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Taping Durock Joints

I have a roman tub that i framed in wood then used durock on in the picture below. Do I need to tape and mud all the joints with thinset just like i did in the shower or can i leave them untapped and just tile over them, since it isnt really a wet area?
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Old 11-27-2005, 08:15 AM   #2
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USG wants you to tape all joints/seams for reinforcement purposes Jason, even in dry areas. You can tape and backfill with thinset as you lay the tile. I'd also advise you to double check your fastener spacings as some appear to be more than the 8" maximum.

In case you haven't seen it, here is a complete Durock installation guide from the USG website. click here
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Old 11-27-2005, 11:51 AM   #3
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Yep, Mikes right. The taping isn't for waterproofing all. It's to keep the grout & tile from cracking near those joints.
So in the shower, that built-in niche (nice job ) and the top of the stub wall will need a liquid waterproofing membrane all around them. Something like Custom Redgard or Latticrete 9235.
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