Designing Kitchens and Bathrooms - no plastic behind hardibaker - problem?
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brian3r45
03-13-08, 02:03 PM
Thanks to all for all the helpful responses today. I've got another question...
I just recently had 1/2 hardibacker hung in my alcove tub/shower area. The joints and screw holes were tapped and mudded I believe with fast drying durarock. That's what the contractor told me when I asked. It's white and looks like the rest of the normal drywall seams.
From reading this forum I don't think that was the best material to tape and mud hardibacker. Contractor says that's what they always used. So that my be problem 1.
Problem 2 is I didn't put a plastic barrier up on the two interior walls, only on the exterior wall. On that exterior wall I stapled plastic from ceilling to floor and did not lip the tub flange.
Should I be worried about problem 1 and problem 2?
It's already done so ripping off the hardibacker would be a huge deal ... it would affect the textured ceilling seam and the mudded drywall seams.
I just recently had 1/2 hardibacker hung in my alcove tub/shower area. The joints and screw holes were tapped and mudded I believe with fast drying durarock. That's what the contractor told me when I asked. It's white and looks like the rest of the normal drywall seams.
From reading this forum I don't think that was the best material to tape and mud hardibacker. Contractor says that's what they always used. So that my be problem 1.
Problem 2 is I didn't put a plastic barrier up on the two interior walls, only on the exterior wall. On that exterior wall I stapled plastic from ceilling to floor and did not lip the tub flange.
Should I be worried about problem 1 and problem 2?
It's already done so ripping off the hardibacker would be a huge deal ... it would affect the textured ceilling seam and the mudded drywall seams.
formula1
03-13-08, 02:55 PM
There is a paint-on waterproofing membrane called Redgard that can be painted over the concrete board. Or you could put up Schluter Kerdi membrane over the CB. Both create a waterproof layer.
Then tile with thinset (not mastic - it will soften if wetted).
Then tile with thinset (not mastic - it will soften if wetted).
Bud Cline
03-13-08, 04:03 PM
The requirement is to have either a moisture barrier behind the cement board or a waterproofing on top of the cement board.
mudded I believe with fast drying durarock
There is no such animal as "fast drying Durock". What I think you are referring to is "fast drying Durabond". Durabond is a gypsum product and gypsum is NEVER to be used in a shower or behind ceramic tile, NEVER. Tile adhesive won't stick to gypsum for very long under those moisture conditions.
If you were to RedGard the surface you may get away with the gypsum but I doubt it.
Contractor says that's what they always used.
THAT doesn't make it the right thing to do. Obviously this guy doesn't know the codes.
It's already done so ripping off the hardibacker would be a huge deal ... it would affect the textured ceilling seam and the mudded drywall seams.
Your choice. It isn't done correctly and there are methods there that would shorten the life of the shower.:)
mudded I believe with fast drying durarock
There is no such animal as "fast drying Durock". What I think you are referring to is "fast drying Durabond". Durabond is a gypsum product and gypsum is NEVER to be used in a shower or behind ceramic tile, NEVER. Tile adhesive won't stick to gypsum for very long under those moisture conditions.
If you were to RedGard the surface you may get away with the gypsum but I doubt it.
Contractor says that's what they always used.
THAT doesn't make it the right thing to do. Obviously this guy doesn't know the codes.
It's already done so ripping off the hardibacker would be a huge deal ... it would affect the textured ceilling seam and the mudded drywall seams.
Your choice. It isn't done correctly and there are methods there that would shorten the life of the shower.:)
brian3r45
03-13-08, 06:23 PM
Thanks guys. I wish I would have been on this forum a few days ago. The bag of Redguard says lifetime warranty over regular drywall, so I'll just give a good coat and hope for the best.