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Old 12-19-2011, 08:27 PM   #1
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Cement board in tub/shower surround not flat


Hi all,

A previous contractor poorly installed durarock for tub/shower surround. Should have been shimmed in places, but instead was screwed tight to studs. It's 1/4" bowed in worst spots - properly positioned over the lip of my cast iron tub in some places, and completely short of the lip in others. Also, the place where durarock butts up to plaster wall is lower on the rock side.

Removing and properly shimming may not be feasible; is it possible to build it back up to level with mortar? Can I use thinset and build it up with several passes, do I use some other type of mortar and screed it all in one shot?

Also, I'm going to tape and thinset corners, then cover the whole thing with Redguard. How long does thinset (or other mud if required) need to cure before I hit it with Redguard?

Thanks for the help.
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Old 01-22-2012, 12:45 AM   #2
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Hard to bow durarock. I'd probably just put in a nice vinyl or acylic surround (I'm getting old & lazy, and like the amenities and sealed/waterproof nature of surrounds! Tiling is so hard, expensive, and prone to leakage & mildew.... And it would so easily let you straighten your walls
Anyway, my talking at you will bring you back out front where someone else might answer you questions!
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Old 01-22-2012, 03:11 AM   #3
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Quote:
Originally Posted by bareshiyth
Hard to bow durarock. I'd probably just put in a nice vinyl or acylic surround (I'm getting old & lazy, and like the amenities and sealed/waterproof nature of surrounds! Tiling is so hard, expensive, and prone to leakage & mildew.... And it would so easily let you straighten your walls
Anyway, my talking at you will bring you back out front where someone else might answer you questions!
It probably wasn't answered because when you know exactly how it was done wrong, then you should know how to fix it right
If he packs some thinset in there and layers it up and rigs it together than that will give him reason to always b!tch about it or simply rip it down and do it exactly the way he is invisioning it... With shimmed out studs and flat board etc..

Todd
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Old 01-22-2012, 08:01 AM   #4
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I agree--why isn't the removal 'feasible'?

Pulling out the bad rock will only take 30 minutes---add a few new studs and hang new rock---(or the old if it's not to beat up.)

While you are in there--make sure you have studs where the tub doors will be--also blocking for safety grab rails---

It's hard enough to get your tiles set on a flat wall---don't cut a corner and end up with a mess--
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Old 01-22-2012, 10:36 PM   #5
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May not be aproblem if you are using small tile. Envision setting tile on a beach ball. 24x24 don't work as well as 1x1's.

But putting up the frame correctly would always be preferrable.
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