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Old 07-26-2013, 10:51 AM   #1
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Tile, RedGard, and Greenboard


I'm a asst. superintendent on a hotel project. We are about to start tiling our bathrooms and we are running into some problems. First of all, I know that Durarock SHOULD be used as a tile underlayment. But the owners of this hotel have chosen not to use DuraRock and speced greenboard, moisture resistance drywall instead.
My tile contractor is telling me that using Redgard moisture sealant on the greenboard is ok, but that it cannot be used on the drywall joint compound. I find that HARD to believe. Painters use latex primer on top of joint compound with 're-activating' the mud, so why would redgard re-activate it? My question is this, Can I paint redgard OVER drywall mud?

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Old 07-26-2013, 10:57 AM   #2
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If they want to be cheap, let them be cheap. They are paying for the materials. Let me guess, all the money they make, the owners send out of the country to a foreign country.

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Old 07-26-2013, 11:10 AM   #3
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Green board can be used its just cheeping out.
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Old 07-26-2013, 11:32 AM   #4
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If there going to go that route then they should be using Denshield not green board.
http://www.buildgp.com/densshield-tilebacker-board
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Old 07-26-2013, 11:58 AM   #5
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Quote:
Originally Posted by joecaption View Post
If there going to go that route then they should be using Denshield not green board.
http://www.buildgp.com/densshield-tilebacker-board
There is also the fabric that I used, but it is a lot more than DensShield, but worth it for not having to worry about water seepage. Problem with DensShield, is that if you do not install it per GP's instructions, it is no better than Green Board.
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