Tub Flange Address For Waterproof Board Install - Tiling - Contractor Talk

Tub Flange Address For Waterproof Board Install

 
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Old 02-17-2019, 01:21 PM   #1
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Tub Flange Address For Waterproof Board Install


Wondering if you tilers are still bringing the waterproof board to just off the tub sill over the flange or maybe you devised a better method to alleviate strapping walls to bypass it. I wish they just made a Wedi, Schlutter or Prova board etc. that was revealed on the back side to drop over the flange. Like a 1 inch high x 1/4 deep rabbit. Man that would make things easier.
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Old 02-17-2019, 01:50 PM   #2
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Re: Tub Flange Address For Waterproof Board Install


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Originally Posted by gowings View Post
Wondering if you tilers are still bringing the waterproof board to just off the tub sill over the flange or maybe you devised a better method to alleviate strapping walls to bypass it. I wish they just made a Wedi, Schlutter or Prova board etc. that was revealed on the back side to drop over the flange. Like a 1 inch high x 1/4 deep rabbit. Man that would make things easier.
I rabbit cut the Kerdi board. Drop it to 1/4" from the tub deck. Tape the tub, fill the gap with Kerdi fix. Same way I do over fiberglass shower stalls.

Tom

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Old 02-17-2019, 01:54 PM   #3
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Re: Tub Flange Address For Waterproof Board Install


I suppose you could modify the bottom row of boards that slip over the flange. Kerdi and goboard are just foam with a skin, easy enough to mod with a utility knife.

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Old 02-17-2019, 02:26 PM   #4
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Re: Tub Flange Address For Waterproof Board Install


Sure hope I haven't been screwing this up for fifteen years..... But I always set the backer board right on top of the flange, building out the wall a tiny bit if needed to make sure that the front of the board sticks out past the flange a half inch or so, then we tile right down to the top of the tub itself.

Then I usually caulk the tile-to-tub seam with color matched grout caulk.
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Old 02-17-2019, 02:34 PM   #5
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Re: Tub Flange Address For Waterproof Board Install


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Originally Posted by tjbnwi View Post
I rabbit cut the Kerdi board. Drop it to 1/4" from the tub deck. Tape the tub, fill the gap with Kerdi fix. Same way I do over fiberglass shower stalls.



Tom


Same thing I do. Not much work to make the rabbit.
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Old 02-17-2019, 02:53 PM   #6
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Re: Tub Flange Address For Waterproof Board Install


I shmoo the gap with kerdifix or sikaflex.
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Old 02-17-2019, 05:56 PM   #7
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Re: Tub Flange Address For Waterproof Board Install


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Originally Posted by onmywayup View Post
Sure hope I haven't been screwing this up for fifteen years..... But I always set the backer board right on top of the flange, building out the wall a tiny bit if needed to make sure that the front of the board sticks out past the flange a half inch or so, then we tile right down to the top of the tub itself.

Then I usually caulk the tile-to-tub seam with color matched grout caulk.
Do you waterproof?
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Old 02-17-2019, 06:34 PM   #8
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Re: Tub Flange Address For Waterproof Board Install


Quote:
Originally Posted by tjbnwi View Post
I rabbit cut the Kerdi board. Drop it to 1/4" from the tub deck. Tape the tub, fill the gap with Kerdi fix. Same way I do over fiberglass shower stalls.

Tom
Thank God
Someone does what I have a done few times. Its a little weak after the rabbit but I leave it a 1/4 off the bottom sill of the tub and fill that void in with waterproof caulk that I use for the joints. I just don't understand why the Kerdi fix is so much more expensive than the other competitors. That kerdi runs 25 bucks a tube at the wholesalers
With the newer style tubs these days the top sill of the tub is getting narrower so any depth I can save is a bonus for aesthetics.

Last edited by gowings; 02-17-2019 at 06:36 PM.
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Old 02-17-2019, 06:35 PM   #9
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Re: Tub Flange Address For Waterproof Board Install


I staple kerdi band on the studs overlapping the tub lip and use kerdifix to adhere it to the tub lip then Durock ultralight board down to the lip. Very fast to install
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Old 02-17-2019, 07:05 PM   #10
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Re: Tub Flange Address For Waterproof Board Install


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Do you waterproof?
Yeah. We tape and skim coat all the backer board seams, then hit it all with Red Gard. Sometimes two coats.

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