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Old 06-17-2012, 07:30 PM   #1
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Shimming Durock


I have a kohler 9026 shower receptor installed in a gutted alcove on a concrete floor. Kohler requires that the concrete board be shimmed out as in attached image. I've gotten different stories from Kohler and Durock on how best to accomplish this.

Kohler says use metal shims (huh?). Durock says just fir out the studs (I guess about 1/4").

What about using 2 layers board (one 1/4" layer and one 1/2")? Are there any caveats to this? If not, should both layers be Durock or would something like hardie board be better for the under layer?

Thanks!
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Old 06-17-2012, 07:48 PM   #2
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Shimming Durock


I would use wood rippers cut on my table saw---or store bought 1/4" furring strips--

Then water proof the face of the Durrock with a paint on membrane like Red Guard by custom or Hydroban by Latacrete--

No need for the expense and time involved with a double layer of concrete board---

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Old 06-17-2012, 07:53 PM   #3
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Shimming Durock


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Originally Posted by oh'mike View Post
I would use wood rippers cut on my table saw---or store bought 1/4" furring strips--

Then water proof the face of the Durrock with a paint on membrane like Red Guard by custom or Hydroban by Latacrete--

No need for the expense and time involved with a double layer of concrete board---
Good tip on the store bought strips. As for the Red Guard, it's already part of the plan. .

Thanks for the comments.
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Old 06-17-2012, 09:18 PM   #4
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Shimming Durock


Lattis strips work fine. Lowes and HD both have them.
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Old 06-17-2012, 11:41 PM   #5
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Shimming Durock


Also, when installing in an alcove to receive tile, should back panel span stud to stud with side panels ending on the back panel?
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