Sanding spackle under redgard


Old 07-31-17, 04:19 PM
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Sanding spackle under redgard

Hi all,

I tore down all of the walls and tile in a shower and put up new cement board. I put redgard over all of the cement board. However, in one spot along the seam between two boards where I taped, the spackle is not completely flush. I noticed it after I put the redgard up. It is raised maybe about a 1/16 or more of an inch, and about 3 inches across.
My question is:
should I leave it alone and tile over it. My concern is I will have a tile that is raised.
can I cut the redgard and sand it down and then reapply the redgard
should I just cut the piece out all together.


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Old 07-31-17, 04:39 PM
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As small as 1/16" is, it means a lot when it comes to tile. Cut out the section & level it.
Old 08-01-17, 03:17 AM
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You said spackle ?? Neither spackling or joint compound should be used under tile in a wet area. Thinset would be the correct material.

btw - welcome to the forums Gary!
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