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Old 09-13-2015, 03:21 PM   #1
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building out a bathroom wall.


hey i just put a new bathtub in an alcove. and on my backwall (the one that meets drywall) i got about 5/8" of a gap between the wall and the tub. since im tiling the surround with 1/2" cement board there was gonna be a gap between the cement board and the tub. i was wondering if i could just put 1/4" sheet of plywood over the entire wall first. that way the cement board will hang over the lip of the tub a bit and it will also be flush with the drywall i will be putting up.

is this ok to do this? i dont want to have issues with my tiles down the road. the wall is relatively straight as is.
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Old 09-13-2015, 03:30 PM   #2
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If the gap is 5/8", the minimum spacer I would add is 1/2". You can just rip 1/2" strips of plywood and attach it to the studs.
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Old 09-13-2015, 05:49 PM   #3
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hmm not sure if i got that much clearance, toilet is pretty close to that wall as is. but ill see what i can do.

so theres absolutely nothing wrong with plywood under cementboard?
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Old 09-13-2015, 05:55 PM   #4
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Most of us think of the 'Back Wall' as the flat wall behind the tub---

Are you speaking of the plumbing wall? One of the 'sides' ??
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Old 09-13-2015, 05:57 PM   #5
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no.. the plumbing is in the half wall in the alcove, the long side wall of the tub is good, but the back of the tub wall is what im referring to. beside the back of the tub sits the toilet. so i would build that entire wall out so the cementboard sits flush with the drywall behind the toilet.
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Old 09-13-2015, 06:12 PM   #6
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So, you're saying the tub end wall?
Toilet's can be purchased for a 10" set
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Old 09-13-2015, 08:12 PM   #7
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what do you mean a 10" set?
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Old 09-14-2015, 05:23 AM   #8
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A picture would help---

Back wall is 5 feet wide---side walls about 3 feet---
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Old 09-19-2015, 11:05 PM   #9
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If all you need is 1/4", when you buy paint from homedepot, grab a handful of longer paint stir stick. Make a couple of trips and you don't have to buy a whole sheet of ply. You just want a spacer, not a new layer of wall. The spacer does not have to be continuous the entire length of the studs.
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Old 09-20-2015, 04:02 AM   #10
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Quote:
Originally Posted by louiedogg View Post
what do you mean a 10" set?
Toilets normally have the center of the drain designed to be 12" from the wall. In other words, if you are picking the spot where the toilet drain will go, you measure 12" from the wall and that is the center of your drain.

A 10" set is a toilet that is basically 2" shallower in the back. Gives you 2" more in front.
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