Duroc in bathroom?

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Old 10-03-19, 07:39 PM
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Duroc in bathroom?

I've seen some mentions on the internet of using Duroc in bathrooms particularly wet areas like wet rooms, showers, under tubs, etc.
if you use Duroc do you still need membrane under tiles and on shower walls?
 
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Old 10-04-19, 03:31 AM
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When using cement board and tile for a shower surround you need to either have a moisture barrier behind the cement board or apply RedGard over it. Floors don't normally need the moisture barrier.
 
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Old 10-04-19, 04:47 AM
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Do you have to use cement board as tile backer or is there an alternative (other than plywood).
what's the benefit of Duroc?
 
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Old 10-04-19, 04:49 AM
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Durock is a brand of cement board.
 
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Old 10-04-19, 05:51 AM
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Yeah but aren't there other things you can use as tile backer? Other than cement board and plywood?
 
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Old 10-04-19, 06:07 AM
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There is a membrane you can apply over plywood so you can skip the cement board, as far as I know that's for floors only.
 
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Old 10-04-19, 06:44 AM
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You shouldn't be putting tiles on plywood.
 
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Old 10-04-19, 05:21 PM
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I think half the world does
cement board stronger obviously.
 
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Old 10-05-19, 04:32 AM
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I've been on jobs where they installed the tile directly to the plywood but you run the risk of the tiles popping loose. The cement board doesn't make the floor stronger but when you use thinset under the cement board and screw it down you get a good solid surface for the tile and the tile will adhere better to the cement board.

That said, under the advice of a tile man I did some painting for, I tiled my wood stove's hearth directly to plywood. He did give me a bottle of additive he said was needed when tiling over plywood. That was 25 yrs ago and the hearth still looks great ..... but if I was doing it today I would use cement board!
 
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Old 10-05-19, 06:04 AM
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There is a membrane you can apply over plywood so you can skip the cement board, as far as I know that's for floors only.
If you use a membrane system, like Prova or Ditra you can actually install tile over drywall for the walls.

Cement board is great since it;s impervious to water itself and is stable.

You need two features in a tile system, a water barrier and then something that physically holds the tile.

Lots of ways to deal with the water barrier, from plastic behind the cement board to coatings to the membrane systems, in about that order of performance!

Floors don't normally need the moisture barrier.
Just to clarify, he is referring to the bathroom floor, not the floor inside of a tiled shower or anything that has water flowing on it!
 
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