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Old 12-06-2007, 12:03 AM   #1
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Drywalling around shower module


Hi all,

I am taking on my first drywall project. I had a tub/shower installed and I have installed the drywall around it. I was told that I can fill the gap between the wallboard and the shower with mud but I have 2 questions:

Along the top edge of the shower, the shower surface dips down somewhat in the center and is higher on the ends. Since I used the factory edge of the wallboard against the shower, there is a 1/2" gap at its widest point. See photo....

Is standard drywall mud going to be sufficient to fill this gap this wide or will I experience problems with cracking down the road?

Also, along the outside vertical edge of the tub section, there was no nailing flange and the plastic tub material flexes in and out when you put pressure on it. This is going to cause a problem if I mud right up to the tub because if it gets kicked the mud is probably going to crack. Any suggestions on how to deal with that?

Thanks for your help.

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Old 12-06-2007, 04:12 AM   #2
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Drywalling around shower module


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....
Is standard drywall mud going to be sufficient to fill this gap this wide or will I experience problems with cracking down the road?
Standard procedure for this is to:

"Flat-tape" it. This means:
1.) Fill in the gap with compound and wipe it smooth.
2.) Apply another coat of compound (per standard tape application): paper tape over so the tape butts up cleanly to the tub's surface edge. Wipe down, apply 1 to 2 coats of compound, and sand smooth.

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Originally Posted by Richo View Post
Also, along the outside vertical edge of the tub section, there was no nailing flange and the plastic tub material flexes in and out when you put pressure on it. This is going to cause a problem if I mud right up to the tub because if it gets kicked the mud is probably going to crack.
Well.....then..........Don't put pressure on it....
Yes, it may crack.

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Any suggestions on how to deal with that?
....Can't help you there. Sounds like an issue with the either: a cheap tub-unit design ...... or actual install problem.

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Old 12-06-2007, 01:14 PM   #3
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Drywalling around shower module


Thanks for your help.

One quick question....when I fill the gap with mud before taping, do I let the mud dry or apply the tape right over the fresh mud and then cover the tape?

As far as the tub goes, it's a Kohler Sterling Ensemble unit which seems to be a common brand for plumbing contractors around here. Don't know if it's considered cheap or not. Even though the gap there is only about 1/8" I suppose I could flat-tape it to try to keep the mud intact and then caulk the area after painting.

Thanks again.
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Old 12-06-2007, 06:25 PM   #4
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Drywalling around shower module


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...One quick question....when I fill the gap with mud before taping, do I let the mud dry or apply the tape right over the fresh mud and then cover the tape?.
Best method is to fill and let it dry. It will "slump" a little. Once it is dry, scrape the slump flat, then apply your compound and "flat tape".

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Even though the gap there is only about 1/8" I suppose I could flat-tape it to try to keep the mud intact and then caulk the area after painting.
Use a good siliconized (silicone added)paintable latex, mold and mildew resistant caulk....
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Old 12-06-2007, 09:11 PM   #5
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Drywalling around shower module


Thanks again for your advice! Much appreciated.
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Old 12-09-2007, 10:46 PM   #6
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Drywalling around shower module


you needed something solid along the top of that tub to stop flexing, any movement will crack drywall mud. Finish the wall and if you're painting it, caulk inside the gap with a good flexible sealant and apply a wood trim that looks good and is sufficient to cover the gap, then caulk along the exposed edges of the trim to prevent moisture seepage into the back of it. If you're going to tile that top wall, same thing, caulk the gap and tile over the caulk.

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