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Old 11-14-2017, 06:36 AM   #6
Kman's Avatar
Join Date: Nov 2006
Location: NW Arkansas, Ozark Mountains
Posts: 9,225
What do you recommend I dam the gaps at the durock edges with?
How big are the gaps? Is this just between the wall and the Durock? If so, just some spray foam insulation would work.

The drain hole is cut; how do you recommend I dam that?
Depending on the size of the hole, a PVC union will work. If it's larger than 5" you'll have to use something else. Maybe some sheet metal that you can fashion in a circle to the correct size, or some roll flashing.

The things you mentioned will also work.

I don't think Ardex requires anything as a primer. Immediately before putting it down, I would dampen the floor with a sponge to keep it from drawing moisture out of the material prematurely.

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