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Unread 01-15-2020, 08:22 AM   #16
Ron411
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Dan,

Yes preslope, pan liner with clamping drain and final mud bed have been completed. I have aquadefense I plan to use for waterproofer on the walls. 11.25x11.25 floor tiles that are small hexagons, 6x18 for the walls. The gap between the Hardi and the final mud floor, what goes there?
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Unread 01-15-2020, 09:28 AM   #17
cx
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Nothing goes in there, Ronnie.

The fiber/cement boards are a poor choice for walls in a shower with a traditional mud/liner/mud receptor for the very reason that you cannot bury the bottom of the wallboard in the top mud bed for support. You cannot use mechanical fasteners lower on the wall than 3 inches above your curb top and there's just nothing at all to hold the bottom of the wallboard as is the case when using a true (ASTM C1325) CBU.

The only thing that will be supporting that bottom edge will be the flexible sealant you'll use between the wall tiles and the floor tiles. I don't like it much, but I didn't get a vote.

My opinion; worth price charged.
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