Thread: Shower
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Unread 03-25-2018, 12:01 AM   #8
Veteran DIYer- Schluterville Graduate

STAR Senior Contributor

Join Date: Jul 2004
Location: Nashua, NH
Posts: 14,419
Tape some plastic down on the area, leave it for 24-hours or so, and see if there's any moisture that accumulates. Some parts of FL have a pretty high water table, and depending on how the slab was installed, you might have a fair amount of moisture vapor coming up. In this case, making your curb out of say concrete bricks or concrete may be more reliable than wood that won't be able to breath once covered with a waterproof barrier. Personally, I'd use a waterproof membrane over the entire shower verses using a liquid. Either can work, but a sheet membrane has advantages. You could make your curb with one of the foam ones available, or from foam panels as well.
Jim DeBruycker
Not a pro, multiple Schluter Workshops (Schluterville and 2013 and 2014 at Schluter Headquarters), Mapei Training 2014, Laticrete Workshop 2014, Custom Building Products Workshop 2015, and Longtime Forum Participant.
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