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Old 03-23-2020, 08:22 AM   #1
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Tub Tile Backer


So I'm remodeling a bathroom. It's 53"x58"; tub is along the right wall, looking in, along the 58" dimension, door is in the 53" wall. Toilet is straight ahead, vanity is immediately on the right, with embedded medicine cabinet and light above. Door swings in to the right, bottoming out against the tub wall. So there's a little area to the left of the toilet, where there's an HVAC vent, where we used to have a freestanding shelf unit. No real room to get crazy, so I'm basically keeping everything same config, just updating materials.

Anyway, the old dated tub and tiles need to go (wall demo is about 3/4 complete) Tile went to about 6' height on the walls around the tub; will probably do same. Wall around tub was expanded wire mesh with plaster, like in this video:

I'll be putting up some kind of backer board, then re-tiling. I see that there are a number of choices at HD. I'm seeing HardieBacker, USG cement board, and WonderBoard. Which of these would be best for my purpose?
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Old 03-23-2020, 08:52 AM   #2
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Re: Tub Tile Backer


Any of them would work well. Most use 1/2" to bring it out to the correct depth.

For areas that aren't subject to direct moisture, like in a shower/tub area, you could use water resistant drywall behind the tile.

I am in same process that you are. I plan on using green board where I have to replace any drywall and in the tub/shower area, I plan on using whichever backer board is cheaper. And then covering it with Red Guard. Just to be belts and suspenders sure.
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Old 03-24-2020, 09:40 AM   #3
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Re: Tub Tile Backer


I'd be more comfortable using something that's supposed to be waterproof, rather than water resistant green board. Also, the products mentioned are 3x5, which is way easier for me to handle solo than 4x8.
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Old 03-24-2020, 11:59 AM   #4
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I am talking about areas far away from the shower/ tub. For example, behind the toilet or vanity if you are tearing down to the sides there.

There is a new Hardiboard backerboard that is waterproof that I just got from Lowe's. It's $20 a sheet vs $15 but you just need to waterproof the seams and the screwheads instead of the whole thing.

I will be using that in my tub surround and shower surround when I get to them.

Now my wife wants to use the porcelain tile for the floor instead of the LVP. DAMN! I at least have Ditra I can use.
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Old Yesterday, 08:48 AM   #5
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Re: Tub Tile Backer


Oh shoot, I just realized you said "aren't subject to direct moisture!" My bad!

Are you talking about the HardieBacker with Hydro Defense?
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Old Yesterday, 09:29 AM   #6
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Re: Tub Tile Backer


Yes, it looks like a poor mans version of Kerdi board.
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Old Yesterday, 09:56 AM   #7
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Re: Tub Tile Backer


you Don’t really need waterPROOF board behind the tile if you are just talking around the tub....but no issue with using it. Different story if you are doing a full shower stall deal. That said, we’ve taken to using purple board for everything else in the bathroom as opposed to the older green board. Adds mold and mildew resistance to the mix and cost difference for a bathroom is very small.
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Old Today, 07:23 AM   #8
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Re: Tub Tile Backer


Well, this will be a tub with a shower fixture, so waterproof would be better IMO.
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Old Today, 09:04 AM   #9
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Re: Tub Tile Backer


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Originally Posted by ktownskier View Post
Or areas that aren't subject to direct moisture, like in a shower/tub area, you could use water resistant drywall behind the tile.

Nope.
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Old Today, 09:06 AM   #10
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Re: Tub Tile Backer


Quote:
Originally Posted by ktownskier View Post
I am talking about areas far away from the shower/ tub. For example, behind the toilet or vanity if you are tearing down to the sides there.

Well "far away from the shower/tub" is a little different than "in the shower/tub area"


Personally I see no reason for "water resistant" drywall to even exist. If you ever need water resistance, then you don't want drywall there. In the situation you're talking about, then standard drywall is fine.
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Old Today, 09:08 AM   #11
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Re: Tub Tile Backer


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Originally Posted by ront02769 View Post
you Don’t really need waterPROOF board behind the tile if you are just talking around the tub....

Yes, you do. Either that or a waterproof covering.

There is no reason to half-ass anything in a shower. You do not tile directly over a water resistant board in a shower, without waterproofing first. Therefore, you might as well use drywall and then put Kerdi membrane over it. Cement board or other expensive or hard to use backerboards are a waste of time if you're going to waterproof properly with a membrane. And if you want to go the other route, then simply use a waterproof backerboard, such as KerdiBoard, and do it in one step. More expensive, yes, but saves labor time and buying 2 different materials.

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Old Today, 09:18 AM   #12
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Re: Tub Tile Backer


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Originally Posted by ktownskier View Post
Yes, it looks like a poor mans version of Kerdi board.

It's a new product to me. Appears to be waterproof, but of course the seams must be waterproofed separately (same as KerdiBoard). Appears to cost about $15 less per board than KerdiBoard. Might be worth it to some. But once you see how easy KerdiBoard is to carry around and cut, you might not ever go back. I can carry the entire shower wall of KerdiBoard under one arm upstairs, and cut it along the printed lines with a utility knife. Fun stuff. For a pro, probably makes more sense. For someone with a little more time on his hands and needing to save a few dollars, there are cheaper options. Seams on the HardiBacker require 2 steps - closing the seam, and then waterproofing (have to wait for each to dry before tiling). With the KerdiBoard the seam is waterproof itself, so one step. Tile immediately after installing with no wait.
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Old Today, 09:24 AM   #13
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Quote:
Originally Posted by jeffnc View Post
Quote:
Originally Posted by ront02769 View Post
you Don’t really need waterPROOF board behind the tile if you are just talking around the tub....

Yes, you do. Either that or a waterproof covering
There is no reason to half-ass anything in a shower. You do not tile directly over a water resistant board in a shower, without waterproofing first. Therefore, you might as well use drywall and then put Kerdi membrane over it. Cement board or other expensive or hard to use backerboards are a waste of time if you're going to
waterproof properly with a membrane. And if you want to go the other route, then
simply use a waterproof backerboard, such as KerdiBoard, and do it in one step. More
expensive, yes, but saves labor time and buying 2 different materials.
Jeff,
Have you seen the new Hardie Backerboard? It is fully waterproof like Kerdiboard.
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Old Today, 11:03 AM   #14
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Re: Tub Tile Backer


Quote:
Originally Posted by ktownskier View Post
Jeff,
Have you seen the new Hardie Backerboard? It is fully waterproof like Kerdiboard.
Never mind, I was reading this before I had my first cup of coffee.

I should learn not to do that.
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