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Old 04-25-2013, 08:56 PM   #1
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waterproofing new tub


Hey guys Im remodeling my bathroom and its a total gut and rebuild. I'm about ready to install the tub but have a few questions i want to make it as waterproof / water tight as possible. I'm going to be tileing inside the shower. this is what i plan on doing please help me figure out if what i'm doing is ok or if i need to make changes. I plan on installing the tub than installing a plastic vapor barrier directly on the studs behind than I plan on installing cement backerboard, and than i plan on installing a waterproof membrane on top of the backerboard like (LATICRETE Hydro Ban) or (Red Guard) something that can ust be painted on and than I plan on installing the tile directly over that. How does this sound I want to make sure it's as water proof as possible any help or pictures would be great
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Old 04-25-2013, 09:03 PM   #2
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Hey guys Im remodeling my bathroom and its a total gut and rebuild. I'm about ready to install the tub but have a few questions i want to make it as waterproof / water tight as possible. I'm going to be tileing inside the shower. this is what i plan on doing please help me figure out if what i'm doing is ok or if i need to make changes. I plan on installing the tub than installing a plastic vapor barrier directly on the studs behind than I plan on installing cement backerboard, and than i plan on installing a waterproof membrane on top of the backerboard like (LATICRETE Hydro Ban) or (Red Guard) something that can ust be painted on and than I plan on installing the tile directly over that. How does this sound I want to make sure it's as water proof as possible any help or pictures would be great
I don't think that will work well. You would have a double vapor barrior... Either use the plastic or the Hydroban / Redgard. I used Redgard for my bathroom shower...
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Old 04-25-2013, 09:31 PM   #3
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waterproofing new tub


Quote:
Originally Posted by b16bri View Post
Hey guys Im remodeling my bathroom and its a total gut and rebuild. I'm about ready to install the tub but have a few questions i want to make it as waterproof / water tight as possible. I'm going to be tileing inside the shower. this is what i plan on doing please help me figure out if what i'm doing is ok or if i need to make changes. I plan on installing the tub than installing a plastic vapor barrier directly on the studs behind than I plan on installing cement backerboard, and than i plan on installing a waterproof membrane on top of the backerboard like (LATICRETE Hydro Ban) or (Red Guard) something that can ust be painted on and than I plan on installing the tile directly over that. How does this sound I want to make sure it's as water proof as possible any help or pictures would be great
There is not limit to the amount of effort you can use to waterproof a shower wall... and at the end, there's no guarantee it won't eventually leak.
30lb Felt paper over the studs would be better/more durable than plastic. I see no need to apply a second membrane over the backer board. It might actually cause some adhesion problems over time on the wall. For added sealing, use a good sealer over your grout and you should have a well built shower wall.
You reference both a shower and a tub in your question, so I'm unclear as to the floor of the project.
Hope this helps,
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Old 04-25-2013, 09:42 PM   #4
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waterproofing new tub


Waterproofing the board is the best insurance you can get---backer board and tile are not water proof---

Some water can and will get behind the tile--so waterproofing the face of the board is the best plan---

Sealers do not waterproof the grout---their only purpose is to make the grout less likely to stain---
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Old 04-26-2013, 06:39 AM   #5
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waterproofing new tub


The floor will be a tub I just call it a shower out of habit lol thanks for all your input I like the idea of the waterproof membrane (red guard) on the backer board but if I go that rout is the barrier or felt on the wall needed or even a good idea at that point what else can I do to help this issue ?
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Old 04-26-2013, 06:56 AM   #6
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When you waterproof the face of the board--no vapor barrier is needed on the studs---

That is considered a double vapor barrier and is not good---
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Old 04-26-2013, 07:51 AM   #7
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Ok thanks for your help now what about insulation do I need to install it ? the tubs on on interior wall but is butted up to the exterior wall normally aren't you suspost to have a barrier when you install insulation. Thanks for you help this will be my first bathroom
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Old 04-26-2013, 10:27 PM   #8
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waterproofing new tub


I agree that a surface membrane is by far the best way to go and never use both surface and plastic or tarpaper over the studs. BTW, tarpaper is not a waterproofing, nor is it a vapor barrier. At best it's a vapor retarder, it's permeable.

In the case where there is faced insulation for an outside wall, I would simply slash the facing and let it breathe.

Vapor barriers are a very confusing subject and their use can vary by location. Where you live might matter, so a call to your town's building department may help.

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