GoBoard and Schluter Pan [Archive] - Ceramic Tile Advice Forums - John Bridge Ceramic Tile


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07-04-2019, 10:45 AM
Hello everyone! I wanted to replace my vanity and ended up with just wall studs. I thought I had everything planned out, but kept overthinking it. Went from making my own pan to a schluter shower kit.

1) How would I attach the kerdi band to the goboard? unmodified thinset? and if so, which are recommended?

2)Will that interfere with modified thinset required to install porcelain tile?

I have given myself a huge headache with thinsets...

Thank you!

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John Bridge
07-04-2019, 10:49 AM
Hi Eloy, :)

The easiest way to accommodate everybody's requirements would be to use Schluter unmodified mortar for everything. Otherwise, any quality unmodified thinset product will work fine. For years, I have used Custom's Versabond for just about everything. :)

07-04-2019, 11:38 AM
Great! Thank you John!

07-15-2019, 05:16 PM
Another question, I am in California and my shower is along two exterior walls and on a concrete slab. There is insulation, can that stay or must it be removed when using Goboard?

Thank you!

07-15-2019, 07:41 PM
Eloy, it frequently helps if you'll add a bit more narrow geographic location to your User Profile so it is permanently displayed to help in answering some of your questions.

California is a State with more than one general climate, which has a bearing on the building science involved with exterior wall packages. In general, I recommend you not have more than one vapor barrier material in the package. Colder climates usually want one on the inside of the wall, where you have your Kraft paper backing, but with only R-11 insulation I'd hafta guess you're somewhere in the southern part of the State. Bottom line for me, though, in most climate zones, would be to defeat the Kraft barrier by cutting numerous short vertical slits in the paper if you intend to install a serious vapor retarder for your shower waterproofing.

My opinion; worth price charged.

07-16-2019, 04:18 PM
I'm on the central coast, thank you for advice!

For the shower pan and walls, will it matter what goes first? Put on goboard then pan against it or pan first and goboard on it?

Thanks again!

07-16-2019, 04:31 PM
By "pan," what do you have in mind?

07-16-2019, 04:42 PM
by pan I meant kerdi shower tray.

07-16-2019, 04:45 PM
Probably makes on difference, then, assuming you intend also to use the Kerdi membrane to complete the receptor. I've never used one of the foam trays, but for mud shower floors I'd want the wallboard in first, then the floor.

My opinion; worth price charged.

07-16-2019, 04:59 PM
Yes, I will be using kerdi band where they meet.

Thanks again, you guys have helped me tremendously.

07-16-2019, 05:19 PM
Mmmm, just KerdiBand? You need to cover that foam tray with Kerdi and the wallboard, too. I know that GoBoard alleges to be waterproof, but I don't know that a connection between it and Kerdi is waterproof.

My opinion; worth price charged.

07-16-2019, 05:36 PM
Yes, that's what I had planned after reading the first reply. It is the newer style kit where the tray and curb already have the membrane installed. Hmm, now I'm back to being worried. Will going over the kerdi band and thin set with polyurethane or aquadefense be ok?

07-16-2019, 05:40 PM
I have no idea, Eloy. You'd need to consult those manufacturers to determine if the find their product compatible with the surface of that GoBoard.

I think it unlikely that they have tested such a combination on accounta........why would they? Perhaps the manufacturer of GoBoard has tested such applications, but I'm not sure what incentive they'd have, either.

If you're willing to experiment on your shower, do report back in ten years or so and let us know how you made out.

My opinion; worth price charged.

07-16-2019, 06:00 PM
Ok, I will call them up and listen to their suggestions, if they give me any.. If that doesn't work then, I just may go buy some green or purple drywall and use the schluter membrane.

Bought the goboard for an easy install but failed. haha

Wife is going to hate me now.

If for some reason I do decide and experiment, I will come back and post.


07-16-2019, 07:27 PM
If you decide to go to a Kerdi system over drywall, Eloy, do yourownself an additional favor and install plain white drywall. Absolutely no advantage to one of them pastel boards and some potential disadvantages.

My opinion; worth price charged.

Tiger Mountain Tile Inc
07-21-2019, 10:34 AM
Here's a link to the new Schluter trays (https://www.schluter.com/schluter-us/en_US/ShowerTrays) for anybody that sees this.

Schluter will have a method for installing Kerdi board with their tray. I don't see any reason that you can't follow that and substitute a different foam board for the walls.