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Old 09-13-2011, 10:04 AM   #1
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Bathroom is gutted, and a few questions


So, my guest bathroom is gutted down to the studs, except i left the cast iron tub. It is small, about 5' x 7'. One wall is an exterior wall. No insulation. I am planning to tile the walls of the shower and the floor.

Questions:

1. Should I insulate this wall? Do I need any type of vapor barrier?

2. Do I need to use MR drywall everywhere in the bathroom?

3. What do I need to put on the studs around the tub to prepare for the tile?
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Old 09-13-2011, 11:41 AM   #2
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1. Yes. yes.
2. Yes.
3. Cement board.
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Old 09-13-2011, 03:33 PM   #3
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Quote:
Originally Posted by Bud Cline View Post
1. Yes. yes.
2. Yes.
3. Cement board.
More details!!

What type of vapor barrier? Plastic sheeting? Is the stuff that is already on the insulation sufficient? How thick of cement board? Just screw the cement board on, tape seams, and tile?
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Old 09-13-2011, 03:52 PM   #4
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Oh I see you didn't want the free advice you wanted the fee advice, well okay then.

Quote:
1. Should I insulate this wall? Do I need any type of vapor barrier?
Exterior walls are always insulated. Interior walls can be insulated for sound if you choose. There are insulation batts for "R-Factors" and their are "sound batts" for sound reduction.

The vapor barrier placed on the studs can be in the form of roofing felt or plastic sheeting the choice is yours. You can forgo the barrier at the studs and use a liquid waterproofing barrier on the inside of the wallboard. You don't want to do both. I would suggest the latter.

Quote:
2. Do I need to use MR drywall everywhere in the bathroom?
I certainly would. Everywhere but in a shower or tub surround that is.

Quote:
3. What do I need to put on the studs around the tub to prepare for the tile?
You can use any number of products available but generally you would use cement board. It must be 1/2" when applied over studs. I would suggest Denshield wallboard. It has a moisture proof face and would eliminate the need for any other moisture barrier but you do have to treat the fastener penetrations and the seams with waterproofing to maintain the waterproofing integrity of the job. You tape the wallboard seams ahead of time in this case so you can later waterproof them.


Later I'll tell you where to send the check.
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Old 09-13-2011, 03:55 PM   #5
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P.S.

You can probably use 1/4" cement board on the floor but there are better products available for floor tiles. Cement boards on the floor required a fresh bed of thinset to install the boards into along with the proper coated screws or nails. Unless the floor is concrete of course.
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Old 09-14-2011, 11:25 PM   #6
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Thank you very much
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Old 09-15-2011, 07:02 AM   #7
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That's it?
It's over?
We're done?
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Old 09-15-2011, 07:11 AM   #8
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Well, in a few days when I am doing this stuff I will most likely have more questions. But, in the mean time I wouldn't mind hearing your opinion on this: http://www.diychatroom.com/f19/what-...d-best-117267/

You seem to know your stuff
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Old 09-15-2011, 09:55 AM   #9
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Quote:
You seem to know your stuff
Awh Gosh Rachel!

You know I did look at that thread yesterday and I didn't understand any of it, so I passed.
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Old 09-15-2011, 08:48 PM   #10
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My main question in the other thread is if it is OK to add the blocking (green boxes in the picture) under the edge of the tub, and then screw the 1x6's to that blocking.
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Old 09-30-2011, 06:51 PM   #11
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Quote:
Originally Posted by Fisher252 View Post
3. What do I need to put on the studs around the tub to prepare for the tile?
You're probably passed this stage, but in case you're not...

Considering adding horizontal blocking in the tub surround area, take copious pictures (even consider holding a yard stick up to the wall in the pics)... later if you want to add a shelf/soap dish/grab bar you'll be very glad for the extra blocking to screw into.
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Old 10-10-2011, 02:43 PM   #12
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Quote:
Originally Posted by bubbler View Post
You're probably passed this stage, but in case you're not...

Considering adding horizontal blocking in the tub surround area, take copious pictures (even consider holding a yard stick up to the wall in the pics)... later if you want to add a shelf/soap dish/grab bar you'll be very glad for the extra blocking to screw into.
Nope, not past it yet. Been working on other things.

My studes are 24" OC, is this ok for cement board or denshield? If not ok, would adding blocking between the studs and putting a few screws into those instead of adding studs be fine? The original cast iron tube will be staying, so it will be a pain to add more studs...
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Old 10-10-2011, 02:48 PM   #13
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Quote:
My studes are 24" OC, is this ok for cement board or denshield?
Nope. Sixteen inch maximum. You can however do as you suggest and install horizontal blocking as long as you center them every sixteen inches.
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