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Unread 04-15-2021, 04:23 PM   #4
cx
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Join Date: Jul 2001
Location: Boerne, Texas
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Welcome, Don.

If your contractor intended to waterproof the interior of the shower using the direct bonded waterproofing membrane (RedGard in your case), he should not have installed the Aquabar behind the backer board. This is especially true when using Hardiebacker, which is a Fiber/Cement board rather than a real CBU (ASTM C1325). Trapping moisture in the Fiber/Cement board between two vapor retarder membranes is not a good idea.

How does he intend to finish the curb? Hopefully not the same way he finished the bench.

My opinion; worth price charged.
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