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Substrate Around Stand Alone Tub ?

 
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Old 02-08-2018, 10:52 AM   #1
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Substrate Around Stand Alone Tub ?


Bathroom reno. Shower 42x48 Kerdi - board (most likely) or Kerdi Membrane over DW. Kerdi pan also.

Floor to ceiling glass on shower curb --- then pedestal / stand alone tub next to shower area.

I'm up in the air about substrate for the 2 walls around the tub ? Walls around the tub subway tile ~ 48" - 60" hgt.

Not sure what is best way to go -- WR - DW with Red Guard, Cement backer board or Kerdi Membrane over DW ? The shower and tub share a 9.5 ft wall so need to have a good transition of materials.

Appreciate your input so I can quiet the committee in my head on this ?

Floor will be Ditra with Kerdi band around the perimeter.
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Old 02-08-2018, 01:27 PM   #2
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Re: Substrate Around Stand Alone Tub ?


4-1/2” of Kerdi Board.

Stack two 2” pieces, back with 1/2”. Cut the niche spaces in the 2” before installing the 1/2” piece.

Tom

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Old 02-08-2018, 01:39 PM   #3
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Re: Substrate Around Stand Alone Tub ?


Tom, maybe re-read....about wall substrate around stand alone tub beyond shower area.

Thanks a lot.
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Old 02-08-2018, 02:54 PM   #4
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Re: Substrate Around Stand Alone Tub ?


Only reason not to use Kerdi Board would be the cost.
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Old 02-08-2018, 08:08 PM   #5
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Re: Substrate Around Stand Alone Tub ?


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Originally Posted by We Fix Houses View Post
Tom, maybe re-read....about wall substrate around stand alone tub beyond shower area.

Thanks a lot.
Got it now...

Kerdi board, easy to install, waterproof, one step install.

Tom
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Old 02-08-2018, 08:20 PM   #6
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Re: Substrate Around Stand Alone Tub ?


I may do that as it would span the new framing completely.


I'll say the vanity /shower control wall 9 ft and the perp wall 9 ft - I built out with 1 5/8 metal stud for a true surface. Was plaster with too much variance with the studs.
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Old 02-08-2018, 08:51 PM   #7
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Re: Substrate Around Stand Alone Tub ?


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Originally Posted by We Fix Houses View Post
I may do that as it would span the new framing completely.


I'll say the vanity /shower control wall 9 ft and the perp wall 9 ft - I built out with 1 5/8 metal stud for a true surface. Was plaster with too much variance with the studs.
They make 10' Kerdi board. At the tub I'd lay it on its side, this will get you to the 4'.

Tom
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Old 02-08-2018, 09:01 PM   #8
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Re: Substrate Around Stand Alone Tub ?


Tom, got a question ---

The height of the walls are 8 ft - 8 inches.

The pic is the shower 42 w x 48 long (see the supply risers) --to the right will be the stand alone tub.

I can stand up the shower....lay down the tub area to 48 hgt.

I'm thinking WR - DW above the Kerdi...put an 8" horiz fill piece DW above the Kerdi or where, up by the ceiling ??

I need to call Dal-Tile about the 10 ft.
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Old 02-08-2018, 09:12 PM   #9
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Re: Substrate Around Stand Alone Tub ?


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Originally Posted by We Fix Houses View Post
Tom, got a question ---

The height of the walls are 8 ft - 8 inches.

The pic is the shower 42 w x 48 long (see the supply risers) --to the right will be the stand alone tub.

I can stand up the shower....lay down the tub area to 48 hgt.

I'm thinking WR - DW above the Kerdi...put an 8" horiz fill piece DW above the Kerdi or where, up by the ceiling ??

I need to call Dal-Tile about the 10 ft.
Any drywall above the tub will be fine. I believe you only need to be 1' above the tub for it to be considered waterproofed. I believe it is also only 1' above the shower head also.

This shower is 10', Kerdi board to the ceiling (tile also goes to the ceiling).

Tom
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Old 02-08-2018, 09:19 PM   #10
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Re: Substrate Around Stand Alone Tub ?


Ok I think I'll go with that. Thanks
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Old 02-13-2018, 11:10 PM   #11
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Re: Substrate Around Stand Alone Tub ?


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Only reason not to use Kerdi Board would be the cost.
Or the fact that it's not in a wet area and there is no need for it.

Then there is the tape and overlap at the seams. I ca't stand Kerdi Board or Kerdi Membrane. Too many steps and too much overlap.
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Old 02-13-2018, 11:14 PM   #12
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Re: Substrate Around Stand Alone Tub ?


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Got it now...

Kerdi board, easy to install, waterproof, one step install.

Tom
One step?

Hang board
Mix Thinset
Install band on seams and over screws

Wedi is one step and no mess of mixing thinset.
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Old 02-13-2018, 11:30 PM   #13
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Re: Substrate Around Stand Alone Tub ?


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Originally Posted by TNTSERVICES View Post
One step?

Hang board
Mix Thinset
Install band on seams and over screws

Wedi is one step and no mess of mixing thinset.
Novel concept, mixing mortar when setting tile...

You not have to apply the sealant to the Wedi joints or cover the screws with the sealant anymore? (Serious question, haven't used Wedi in about 2 years) I hate working with the sealant.

I've used both, give me Kerdi board any day.

Tom
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Old 02-14-2018, 12:09 AM   #14
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Re: Substrate Around Stand Alone Tub ?


Quote:
Originally Posted by tjbnwi View Post
Novel concept, mixing mortar when setting tile...

You not have to apply the sealant to the Wedi joints or cover the screws with the sealant anymore? (Serious question, haven't used Wedi in about 2 years) I hate working with the sealant.

I've used both, give me Kerdi board any day.

Tom
I don't know of any setter who sets tile the same day they install the Kerdi. So it's an extra step. During an bathroom remodel we will set the shower and floor (Kerdi pan on the shower, DensSheild walls and Ditra floors) and then have some other trades come in and finish drywall and prime the walls.

And yes you still have to use sealant on the seams and screws, but it's all the same step and there are no strips to cut or screws to cover with fabric. You apply the sealant to the seams and screws as you install. No extra step of mixing anything or have to clean up a thinset mess. No buckets to clean. Just two products, the board and the sealant.

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