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what to use for backing for tiles in shower

Posted: Mon Jul 16, 2018 7:02 pm
by emtnut
What do you guys suggest for backing of tiles for a shower. Cement board, kerdi board, just green drywall ?

Re: backing for tiles

Posted: Mon Jul 16, 2018 8:07 pm
by Shannon
I would recommend Kerdi board or cement board. You could use green drywall covered with Kerdi fabric but what you save on the material costs between that and Kerdi board you quickly make up on the time taken to install buy using Kerdi board.

Re: backing for tiles

Posted: Mon Jul 16, 2018 8:30 pm
by A. Spruce
There was a time when you could stick tile directly to green board, but I don't think that's allowed anymore, at least here in the states. I've never used Kerdi board before, so can't offer any recommendations there.

Re: backing for tiles

Posted: Tue Jul 17, 2018 7:59 am
by emtnut
Does the Kerdi board go directly against the studs, or should there be drywall or vapour barrier behind it ?

Re: backing for tiles

Posted: Tue Jul 17, 2018 9:53 am
by Shannon
You basically install in place of drywall directly to studs. If it is an exterior wall then there would be insulation and air/vapour barrier installed first. There are special fasteners packages to purchase as well as the kerdi board and you need Kerdi band to seal all seams and fasteners.

Re: backing for tiles

Posted: Tue Jul 17, 2018 8:01 pm
by emtnut
Thanks Gents :)

This is a handy site ... I just might bookmark it :mrgreen:

Re: backing for tiles

Posted: Wed Jul 18, 2018 7:13 am
by Shannon
emtnut wrote:
Tue Jul 17, 2018 8:01 pm
Thanks Gents :)

This is a handy site ... I just might bookmark it :mrgreen:
You really should! We have an excellent electrical section as well.

Re: backing for tiles

Posted: Wed Jul 18, 2018 9:43 am
by emtnut
Shannon wrote:
Wed Jul 18, 2018 7:13 am
emtnut wrote:
Tue Jul 17, 2018 8:01 pm
Thanks Gents :)

This is a handy site ... I just might bookmark it :mrgreen:
You really should! We have an excellent electrical section as well.
That Aaron guy seems good ... The other guy is a nutcase :mrgreen:

I think Sprucy should ban him :lol:

Re: backing for tiles

Posted: Wed Jul 18, 2018 2:29 pm
by greg1
What about green board and waterproofing it with redgard or alike? I see new construction in my area that how they do it, just drywall and waterproofing membrane.

Re: backing for tiles

Posted: Wed Jul 18, 2018 4:42 pm
by Shannon
I have never used that or seen anyone use it.

Re: backing for tiles

Posted: Sat Jul 21, 2018 10:48 am
by emtnut
Shower drain .... Sillycone or putty ?

I've always used putty, mfr instructions says sillycone.

Re: backing for tiles

Posted: Sat Jul 21, 2018 12:28 pm
by A. Spruce
I am not a fan of silicon, however, if that is what the manufacturer recommends, then that would be the product to use. If they are ok with putty and you prefer it, use putty. Depending on the type of material, putty can stain, which is why many manufacturers have switched to silicon

Re: backing for tiles

Posted: Sat Jul 21, 2018 4:35 pm
by Shannon
Putty seems to really dry out over time with some of today’s materials and that is I believe why many manufactures have gone to silicone instead of putty.

Re: backing for tiles

Posted: Sat Jul 21, 2018 6:55 pm
by emtnut
Thanks again. I will go with silicone. I wouldn't want to risk any staining or leaking down the road.

I'm pretty sure that's what was there originally, cause I couldn't remove the drain at all. I ended up using the grinder and sawed out the base to remove it :shock:

Re: backing for tiles

Posted: Tue Aug 07, 2018 4:55 pm
by Tooltimetim
Forget every thing else. Get Den's Shield Tile Backer Board. Sold at home depot or Lowe's for $20.00 a sheet(32X60) It's light,, easy to install,, Used it for Many years,, Mold can't grow on this product,, Use 100% Silicone in all seams,, then use pro-shield hpg waterproofing. Google it....

If you want the best,,, and easiest to install and cost efficient product...... Thank me later.
any questions or pictures on how to install,, let me know.. Cheers !!!

Re: what to use for backing for tiles in shower

Posted: Fri Sep 28, 2018 3:13 pm
by bobthebuilder
I went with Denshield for my second floor bathroom, along with Mapeii Aquadefence for the seams. The product is easy to work with, and waterproof when installed properly.

I actually tested the waterproof claim, and left some water inside a ring of plumber's puddy (see photo). The water was still there after 24 hours, and the back of the Denshield was bone dry :D

Kerdi is also a great product, but I find Denshield easier to work with, and more cost effective.

I've also seen some installers use concrete backerboard, with several coats of redguard or Mapeii aquadefense rolled on.

Re: what to use for backing for tiles in shower

Posted: Fri Sep 28, 2018 9:39 pm
by emtnut
bobthebuilder wrote:
Fri Sep 28, 2018 3:13 pm
I went with Denshield for my second floor bathroom, along with Mapeii Aquadefence for the seams. The product is easy to work with, and waterproof when installed properly.

I actually tested the waterproof claim, and left some water inside a ring of plumber's puddy (see photo). The water was still there after 24 hours, and the back of the Denshield was bone dry :D

Kerdi is also a great product, but I find Denshield easier to work with, and more cost effective.

I've also seen some installers use concrete backerboard, with several coats of redguard or Mapeii aquadefense rolled on.
Thanks for the tip, I'll look into the Denshield on my next bathroom.

I ended up using the Kerdi board (not cheap !! ) ... pic of the kerdi before tiles ...

Re: what to use for backing for tiles in shower

Posted: Sun Sep 30, 2018 5:39 pm
by bobthebuilder
Kerdi is a great product. Bullet-proof system when installed correctly :D Nice install by the way!

The Schluter line of products are by far the best on the market in my opinion (ditra, ditra heat etc.). Never had a problem with their products yet.

Re: what to use for backing for tiles in shower

Posted: Mon Oct 01, 2018 10:35 am
by diggler306
On the topic of DensShield, I just picked up a bunch to do the tub/shower surround in my basement bathroom. I've never used it before but I liked that it's easy to cut because I'm planning on using a pre-fab niche and cutting it in after starting the tile for perfect placement. I can easily use a multitool to do this.
They specify to use 1 1/4" rust-resistant coarse thread screws.... well what the heck? Do I need to buy the hardi/cement board screws? Exterior screws? ACQ deck screws? I will be treating the screws and seams with liquid waterproofing, probably Redgard, anyway so could I just use a regular drywall screws since they are black coated?

Thanks for your info - located in Saskatoon, Canada. :)

Re: what to use for backing for tiles in shower

Posted: Mon Oct 01, 2018 1:22 pm
by bobthebuilder
I used regular drywall screws. I covered each of the screws with a small patch of kerdiband. In the photo, I ended up covering the kerdi band with aqua defense just because I had some aquadefense left over. This is totally unnecessary, as the kerdi band itself is waterproof.

You can also cover the screws up with redguard or mapeii aquadefense.

Re: what to use for backing for tiles in shower

Posted: Mon Oct 01, 2018 6:40 pm
by Shannon
I would think that covering the drywall screws in Aqua defence would be enough.

Re: what to use for backing for tiles in shower

Posted: Tue Oct 02, 2018 5:32 am
by christoff
I always use Rockon backer board screws that have a coating to resist possible rust from getting to the grout.
They are expensive but are used in conjunction with high moisture.

Re: what to use for backing for tiles in shower

Posted: Thu Oct 11, 2018 8:10 am
by diggler306
Thanks for the replys fellas!

Re: what to use for backing for tiles in shower

Posted: Fri Oct 12, 2018 4:27 pm
by Invest777
Are you going to show the finished product?

Re: what to use for backing for tiles in shower

Posted: Tue Oct 23, 2018 5:01 am
by adamsmith
Looks like kerdi board do wonder in blocking the moisture to the drywalls.