Large corner gaps between installed cement board [Archive] - Ceramic Tile Advice Forums - John Bridge Ceramic Tile


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02-25-2008, 01:57 PM
Fantastic and informative forum!

I removed my bathroom walls (around 3 wall alcove tub) to stud then insulated/ vapour barrier and screwed cement board to the studs. In the process of cutting the cb and installing to walls the gaps in the corners (ceiling to wall corner; wall to wall corner) are anywhere from 1/8 to almost 1 inch wide (thanks to my rookie cutting abilities). What should I use to fill these gaps or will this even be a problem when it comes to adhering the tile? Probably go with 8" or 12" tile on walls.

Thank you.

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02-25-2008, 03:45 PM
1" is way too much, I'd just get a few new sheets,

*measure twice, cut once*

:) :) :)

John Bridge
02-25-2008, 04:32 PM
Hi Jack, :)

I don't see how you can have a one-inch gap in the corner and still have the sheet attached to the corner post (stud). I think Mack is right. If it's really that bad, maybe you ought to think about re-dowing the worst sheets. :)

02-25-2008, 05:35 PM
1" way to much to just try and fill. You should probably replace the sheet.

02-25-2008, 06:10 PM
Make sure it is due to your "Rookie cutting abilities" and not the walls being out of square or plumb or else you will have a difficult time tiling later. :)