[brockmiera]

Ok so here is the situation. I am renovating a basement bathroom. I took it down to nothing and have built it up. The shower will be two framed walls and one exterior concrete wall.

the previous owner had taken mastic right to the concrete walls and attached the tiles. I scraped it all off with the thought that I would do 1/2" XPS, Kerdi liner over that and tile directly to that.

The reason I want to do this instead of framing a wall there is because of space. I dont have an extra 4" because of where the toilet flange is set and I dont want to move the toilet if I dont have to.

I got to thinking last night while I was looking at the xps. Will the tile cause the XPS to separate from the wall?

What do the experts think I should do?

 

[brockmiera]

Here are some pics.

 

[brockmiera]

One thought I had was to attach a few 1x3's to the concrete wall thru the XPS. I dont know if I need them but I'd sure hate to have that nice tile start pulling away from the concrete wall.

 

[drtbk4ever]

I am just guessing, but I don't think you would get any longevity by tiling directly onto the xps.

Could you put the 1X3's on the wall, tapconed thru the xps to the concrete, then apply concrete backer board to the 1X3s, then do the tiling?

Again, I'm just guessing. Hopefully my silly ideas will bring out an expert or two.

 

[brockmiera]

I am just guessing, but I don't think you would get any longevity by tiling directly onto the xps.

Could you put the 1X3's on the wall, tapconed thru the xps to the concrete, then apply concrete backer board to the 1X3s, then do the tiling?

Again, I'm just guessing. Hopefully my silly ideas will bring out an expert or two.

Yeah for some reason I thought that glue would be enough. Maybe because of how amazingly hard it was to get those other tiles off the wall. But I think you are right.

I'll probably end up using 1x3's and framing the wall.

In order to keep the wall to a minimum thickness, do you think I can get away with 1/4" backerboard?

 

[drtbk4ever]

We need Bud or Jazman to comment on that.

 

[brockmiera]

No joke. Where is Jazman when you need him.

 

[drtbk4ever]

I sent him a PM to ensure he shares his thoughts with us when he logs on.

 

[joecaption]

No way is tile going to work out just stuck to foam!

 

[brockmiera]

No way is tile going to work out just stuck to foam!

Ok thats three votes against my original thought. :thumbsup: How now should I go about fixing it?

Do you think 1x3's tapcon'd to the concrete wall and nailed to the sill plate will work as framing?

 

[drtbk4ever]

No way is tile going to work out just stuck to foam!

Come on Joe, provide some ideas please.

 

[JazMan]

No joke. Where is Jazman when you need him.

Here I is! :laughing::wink:

If you fir out, You may want to go thicker than 1x3" It's only 3/4 thick.

But.......how about Kerdi Board?????? It's made for just this type of job.

http://www.youtube.com/watch?v=_oV1riVyU0w

Take a look. This should solve your problems.

Jaz

 

[brockmiera]

JazMan

Thats all we get today???

 

[drtbk4ever]

Here I is! :laughing::wink:

If you fir out, You may want to go thicker than 1x3" It's only 3/4 thick.

But.......how about Kerdi Board?????? It's made for just this type of job.

http://www.youtube.com/watch?v=_oV1riVyU0w

Take a look. This should solve your problems.

Jaz

See, I knew we needed Jazman's help.

 

[JazMan]

Also try this:

http://www.youtube.com/watch?v=Ca1-t0Os4wo

Jaz

 

[brockmiera]

Also try this:

http://www.youtube.com/watch?v=Ca1-t0Os4wo

Jaz

Yeah that woulda been a good way to go. Lets say i already have 1/2" xps on the wall. What could I do now?

 

[JazMan]

I would spend 10 minutes and remove the xps and continue with Kerdi Board. Or, install furring either 1x3 -4 or 2x4's flat and then go with wallboard and Kerdi membrane or concrete backer and then Kerdi fabric or other waterproofing method.

I didn't read your intentions, so what method of tile installation are you planning?

Jaz

 

[brockmiera]

I would spend 10 minutes and remove the xps and continue with Kerdi Board. Or, install furring either 1x3 -4 or 2x4's flat and then go with wallboard and Kerdi membrane or concrete backer and then Kerdi fabric or other waterproofing method.

I didn't read your intentions, so what method of tile installation are you planning?

Jaz

Kerdi membrane over the xps is what i was planning. I can kerdi over the wall. Where can I get kerdi board?

 

[JazMan]

I have no idea if unmodified, (or even modified) will bond well and if xps is a suitable substrate, never had to do that.

I found 8-10 dealers that claim to be Schluter retailers. But I doubt any carry the board. They'd have to order it from the distributor. Best to call Schluter to see if they know which distributor stocks Kerdi Board.

United States of America
Schluter-Systems L.P.
194, Pleasant Ridge Road
Plattsburgh, NY 12901-5841

Phone: 1-800-472-4588

Tell them hey for me.

Jaz

 

[brockmiera]

I have no idea if unmodified, (or even modified) will bond well and if xps is a suitable substrate, never had to do that.

I found 8-10 dealers that claim to be Schluter retailers. But I doubt any carry the board. They'd have to order it from the distributor. Best to call Schluter to see if they know which distributor stocks Kerdi Board.

United States of America
Schluter-Systems L.P.
194, Pleasant Ridge Road
Plattsburgh, NY 12901-5841

Phone: 1-800-472-4588

Tell them hey for me.

Jaz

Can do. Thanks Jazman