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Unread 11-18-2020, 05:47 PM   #1
espo21
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Trying to tile a backsplash on a wavy wall

Hi everyone, I'm trying to tile a backsplash on a wall that's pretty wavy, with gaps in the 1/4' - 3/8" range over a 6' span. I've spent quite a bit of time researching previous posts as this question seems to come up quite a bit. Seems like the general response is to build up the low spots with hot mud and screed it up using a straight edge. Prime then tile. So this was my plan. (I'd love to rip it all out and add durock but the wife shot that idea down quick

I reached out to USG to see what product they would recommend for doing this, and their response was a resounding NONE. They said no product of theirs is designed to take on the weight of tile when applied at that thickness.

So now I'm stuck.. I'm looking to go with a marble 3x6 subway tile. Am I overthinking this? is this just a CYA move by them and building the low spots out would work just fine?
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Unread 11-18-2020, 06:41 PM   #2
Davy
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You can use a patching compound like Custom's "Fix it all". It sets fast and can be sanded afterwards if it needs it. I'd probably apply it in several thin coats.

It's not by the book but I've used thinset for this in thin coats. It takes longer to set though.
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Unread 11-19-2020, 08:31 AM   #3
espo21
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thanks Davy I'll take a look at that. I appreciate it
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