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Unread 05-19-2016, 04:30 PM   #4
Veteran DIYer- Schluterville Graduate

STAR Senior Contributor

Join Date: Jul 2004
Location: Nashua, NH
Posts: 14,907
Does that linear drain have weepholes? If not, how is the water beneath the top supposed to drain out?

Industry standards call for caulk at all changes of plane, which would include wall/floor and wall/wall.

With REdgard on the walls and them sitting in the pan (you do know that Hardie does not allow HardieBacker to be installed IN the pan - it must end above it), any moisture that got into the pan can weep up behind the waterproofing layer and make a mess of things. Hardie is in the class called fiber-cement boards, and those cannot be inside of the pan, only to be used when terminated above the pan.
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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