How To Install Kerdi Board | Wet Shim Installation
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- čas přidán 3. 04. 2019
- Wet shim installation Kerdi Board www.ejflooring.com
A lot of installers believe that the only way to achieve a perfectly flat substrate is to mud it. When we install Kerdi Board we use the wet shim installation method. By wet shimming the board to the studs we eliminate hills and valleys giving us a perfectly flat substrate. This video is kept real time and as you can see it only adds a few minutes to the installation but the results are completely worth it.
We did use modified mortar for this application, but non-modified works just as well. The mortar will stick to the back of the Kerdi Board so there’s no risk of the shim falling out causing issues in the future.
What do you think of wet shimming the walls flat? Starting out with a great substrate will really help to have a fantastic tile installation as well. Take your time on prep, it’s not a place to cut corners.
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This technique saved my horrible old framing. Thanks.
It’s so much easier than planing high boards and sistering low boards. I’m glad I could help with your project.
Very creative solution, we used actual shims (and shaved down some parts with a dremel) to get our wall completely flat, this would have saved half a day.
+Curt Carlson Wet shimming is an approved method, just takes a little thinset. If you’re using Schluter you’ll need mud anyway for the banding so you’re a step ahead there as well. Thanks for the compliment, I really appreciate it.
Nothing like the good old days when 4x8 Kerdi was in stock....
Yep, I remember it fondly.
@@friendlyneighborhoodtileguy Anyway, thanks so much for this video, exactly what I need to do, this helped very much. I did find the 48"x38" kerdi pieces in a kit. Would much rather have 4'x8' though. But I think I can make it work
Great video! What are some brands of modified thinsets do you recommend to wet shim the Kerdi to the 2x4s?
Schluter All Set and Schluter Set (unmodified) both work for wet shimming. I’d use a mortar that doesn’t void the warranty.
Ingenious!
Thank you
What is the biggest gap you could bridge with wet shimming?
Thank you for the video :) Our wonkey stud wall thanks you .
Personally I wouldn’t go beyond 1/2”. If it’s worse than that I would sister a stud alongside and straighten the wall that way. Anything over 3/16” being wet shimmed needs 1-3/4” fasteners as well. Thanks for the comment and good luck with your project.
I found your video here. Question: is it recommended to install the kerdi board on the walls BEFORE the shower tray?
It doesn’t matter which one is installed first, it matters that the tray is banded to the wall with Kerdi Band. We install the walls first, typically, just to keep off the tray as much as possible. Great question, thank you.
Did you have to use Schluters thinset for the wetshimming or can you use any rapid set thinset? I know obviously to stay within Schluters' warranty, they recommend their thinsets when tiling and applying the various components of the shower system, but what about the shimming part? I dont see why it should make that big of a difference
We only use what the manufacturer requires.
Do you pre-wet the studs with a sponge like subfloor?
That’s a great question. We don’t do that presently, but I can’t see the harm in doing so. I’ll ask my Schluter rep what he thinks and post an update here once he gets back with me. Thanks for asking the question, I look forward to learning as well.
I hear, in all the wet shim videos I've watched, to come back when everything is dry to screw in the screws. Won't this crack the thinset and make it crumble to the ground? Defeating the whole purpose? thanks for any info, I'm a DIYer about to do this to my tub alcove, and it remains my biggest question
The thinset will stick just fine to the back of the board. I had a similar concern and the manufacturer set my mind at ease reminding me that the thinset sticks just fine to both surfaces.
@@friendlyneighborhoodtileguy I understand that, but does a screw crack thinset that has dried? Or do you have to time it so you are screwing into semihard thinset?
@@stevenkern6406 we’ve never heard any cracking or falling debris when installing the next day or even after a weekend. I think you’re fine.
Why do you apply thinset to the studs that aren’t causing issues? Couldn’t you just wet shim the studs that are recessed?
Our concern is just trying to raise the low stud could inadvertently cause the other studs to be slightly lower. Spreading a small amount of thinset mortar on all the studs eliminates that concern. Great question, thank you for asking.
@@friendlyneighborhoodtileguy ok that makes sense now that I’m thinking about it. We only use Schluter products and have typically shimmed the studs with plywood. I love this technique! I will definitely be using it on the shower I start next week 👍🏼
What happens if you plumb the shower wall and it doesn't line up with the drywall?
Are you asking if the wet shim pushes the board out the plumbing may not be set correctly? We check the wall flatness prior to installing the plumbing and take the added thickness into account. Great question, thank you.
i think he meant to say if the shower wall thats being wet shimmed meets up flush against drywall that is not plumb there will be an issue.
Why not just use drywall shims? Quicker (you can put board up immediately), cheaper, easier.....
I don’t think shins are any faster and using this method you’ll definitely have better support. Shims work, I’m not saying they don’t, I just like this method better.
No insulation , sound barrier nothing ? 🤔
And?