Drywall next to plaster


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Old 03-15-20, 11:39 AM
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Drywall next to plaster

I am trying to install drywall on the studs next to plaster in my bathroom. I noticed in an earlier forum if the walls don't line up exactly you can simply mud them to make them match. My question is can you put up a piece of drywall and measure how far they won't line up before hand, and put something behind it like cement board or something else. The reason I would prefer to not mud is because this will be in my shower stall and will have subway tiles installed over, all the way around. Thanks.

Btw, I'm a noob!!
 
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Old 03-15-20, 02:10 PM
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Yes. You can shim the studs out with whatever you can to bring the new wall material (see below) closer to even with the plaster.

However, you should not be using any drywall (including moisture resistant) in a shower even if you are covering it with tile. You should only be using a cement board or other material like Denshield.
 
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Old 03-15-20, 03:46 PM
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Cut strips of plywood and put it on all the studs as needed as a shim. Plywood comes in all thicknesses depending on what you need.
 
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Old 03-15-20, 09:43 PM
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Ok, so shimming the studs makes sense and I think that will work for my situation. Would it be better for me to use Kerdi board instead of drywall? From what I have researched it seems like that is a great product for showers and baths...

Is it ok to Kerdi next to plaster?
 
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Old 03-16-20, 10:15 AM
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Kerdi is a little more involved than you might think. Most installers have to go to school for it. This video at the 8:00 mark shows what you do at the Kerdi/drywall or plaster transition. Both surfaces should be perfectly flush before the Kerdi band is applied.

If you are applying wall tile in a shower you would either install Kerdi, or you would put up cement board and/or apply a product like Redguard before you tile.
 
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Old 03-17-20, 10:31 AM
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I really liked putting up Kerdi board. It's lightweight and easy to cut and attach. I was wondering why everyone doesn't use it all the time! But then I got to using the Kerdi Band on the seams and over the screws. It was quite labor intensive and made me rethink the whole process. It's certainly not hard, but definitely time consuming.

I think my next shower/tub surround will be back to cement board with a roll of kerdi (or other company) waterproofing over top. Not for quality - but for speed and hassle of installation.
 
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Old 03-18-20, 12:04 PM
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I am thinking that cement board and redguard is what I am planning, with plywood shims to level with the plaster. I'm still doing research but I think that is where I am leaning so far. There are so many options and different combos. Why are there so many ways to skin this cat, it's hard to choose.
 
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Old 03-18-20, 01:44 PM
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Personally I like DensShield. It is easier to install compared to cement board and has better water-resistance.
 
 

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