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Unread 02-26-2019, 03:33 PM   #87
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Join Date: Sep 2018
Posts: 210
After further prodding, Schluter pointed out that their ditra installation handbook states that any substrate leveling should be done prior to installation of Ditra and stated that the gap in front of my tub would fall under substrate preparation and should therefore be filled by other (unspecified) means.

So it's back to plan A: put sill gasket between plywood sheets, fill the rest of the gap with floor patch and hope the tile-to-tub joint won't be adversely affected by being 1/2" away from an expansion joint.
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