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Unread 04-03-2021, 03:33 PM   #67
Sclib
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Join Date: Mar 2021
Location: Green Valley, AZ
Posts: 90
Thanks CX!! Anybody else on the CBU Gap?

Thanks CX. That’s good info on the fasteners. Sounds like I can install one more screw lower than what I have now (following your suggested, non-official but real world guidelines). This will ensure, along with weight of top mud deck pushing against bottom of panels, that my walls will be in plane at bottom.

Anyone else care to weigh in on CBU gaps? I like CXs answer, just wondering if anyone has any real life horror stories from filling 1/4” but mainly 1/8” gaps with thinset and tape? As long as I believe (in my mind) that there is a low probability of tiles popping off the walls or severe grout joint cracks due to these gaps (using 12”x24” tiles and 1/8” grout joints), I will go forward taping and filling gaps as-is after I install the top mud deck.

Stay safe out there and know that all of your help is invaluable!!!
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