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Unread 01-03-2022, 11:00 AM   #1
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Wet shimming Densshield

I am about to remodel an alcove tub/shower and will be using Densshield for the backer. The framing is slightly out of plumb and I wanted to know if anyone has any information on whether or not wet shimming is ok? I probably need somewhere between 1/8" and 1/4" over 6'. The only thing I found online is for foam boards. I called GP and they said they cannot say one way or the other. They have not done any testing.
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Unread 01-03-2022, 11:05 AM   #2
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Welcome back, Jason.

If you're talking about using thinset mortar as your "shimming" medium, I think it's a terrible idea, whether for foam boards or any other type of backer board.

I'd recommend some rips of plywood, some wood shims, or some cardboard drywall shims for your application.

My opinion; worth price charged.

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Unread 01-03-2022, 02:21 PM   #3
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I would recommend losing the Denshield and getting some regular cement backer board, Durock or equal.
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Unread 01-04-2022, 04:01 AM   #4
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When the manufacturer says, “they can’t say”, it means no. It means they don’t want to disappoint you or turn you away from their product…but that they want an “out” if anything goes south in the future.

I’ve used most every board available in the States. And I would avoid Densshield because the directions you are supposed to follow aren’t realistically possible without a lot of fussing around. And at the end of the day, the interior core is susceptible to moisture damage. And a board that’s susceptible to moisture damage in a shower application is not logical or a smart use of your resources.

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