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Old 01-24-2008, 01:13 PM   #1
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Cement Board and Drywall

I am remodeling my bathroom and I have torn down the old greenboard around my bathtub but left the ceiling thats the old drywall and still in good condition. I plan on using cement board and tile from the tub to the ceiling. My question is, how do I seal the area between the cement board and the old drywall on the ceiling? I'm trying to avoid messing with the integrity of the ceiling.


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Old 01-24-2008, 01:51 PM   #2
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When I've done this in the past I just butted the cement board within a 1/8" or so of the ceiling, and then tiled up to the ceiling, and applied a bead of silicone caulk between the tile and the ceiling. Not sure if that's Kosher, but it seemed to work for me.


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Old 01-24-2008, 03:32 PM   #3
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You can apply paper tape and compound to the corner, as you would with a normal sheetrock wall and ceiling. Treat the cement board like normal sheetrock.
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