I am fairly handy but I am having some concerns with the durock I just hung in our tub/shower. I made sure all joints were tight but am a bit confused on what to use to seal those joints. I have heard do not use a premix thinset, that’s fine but I also heard on the site that some people do their taping the same day they hang their tile. Just want some clarification on those two questions. Secondly, my durock runs a little over six feet in the shower and the there is greeboard. Should I use the thinset to tape those joints running the fiberglass tape and thinset onto the greenboard?

Thanks,
LJM

You can use modified thisetto tape your joints with fiberglas woven tape but not the same day you tile. The thinset needs to complete set before tiling.

You don't really have to tape durock joints if you don't want to. Typically, if you tape the joints and use thinset to bond, you will make an uneaven surface for the tile to rest on. What you need to do is Caulk all of your joints with silicone when you are done with the tile. Use 100% silicone. You have to be careful when using silicone because cleanup can be a mess. However, the seal will be better.

Quote:

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Originally Posted by Jamie88

You don't really have to tape durock joints if you don't want to. Typically, if you tape the joints and use thinset to bond, you will make an uneaven surface for the tile to rest on. What you need to do is Caulk all of your joints with silicone when you are done with the tile. Use 100% silicone. You have to be careful when using silicone because cleanup can be a mess. However, the seal will be better.

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Hey Jamie

I thought I was the inventor of that trick. It works great doesn't it. Did my own kitchen counter back in 1986 and used the old silicone liquid seal and the grout started to fail in 1990. I regrouted and then thought about how well silicone rubber worked on bath tubs, so I got a tube of clear and masked the 1/4" sanded grout lines and used my fingers to coat the cured grout. That was almost 17 years ago and the sealer and grout is still as good as new. Would you believe that! :D nm

Ok this is it
Why spend money for silicone when it is not needed
Before you tile up the wall apply the mesh tape for cement board ( its thicker than standard tape)
Bed in with 6" taping knife
Scrape off excess material and tile over
By the time you get going on the walls it will set up BAM