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Old 12-04-2001, 11:06 PM   #1
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Join Date: Dec 2001
Location: new york
Posts: 2

first off, i must thank everyone involved for this great site. i am hooked on my first visit.
my question is concerning durock installation around a tub.
i have gutted my bathroom down to studs. i have replaced all warped floor & wall studs (leveling & plumbing as close as possible).
new tub (americast) went in on a bed of structolite, on top of 1.25 in of ply & pl400
tacked on a few places on ledger board & on floor (tub ain't movin or coming out in 1 piece).
until discovering this site, i've had the advise of 2 good friends, 1 a general contractor for 15 yrs & the other a tile setter for 25 yrs.
both people told me to mount the durock right on the top of the lip of the tub & fill the gap with thinset when covering with the bottom row of tile. then grout & caulk.
my tile friend also said to mix all thinset & grouts throughtout entire job with latex additive instead of water
( further strengthning & waterproofing job). both friends were in general agreement.
problem is, neither one mentioned a barrier between rock & studs & both have done previous installations like this before.
i only have 1 3x5 panel in place along bottom of back wall so far. it is screwed & pl to furred hat channel on brick (i don't think it's comming out).
how far out or ok am i ??
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Old 12-05-2001, 06:48 AM   #2
John Bridge
Join Date: Mar 2001
Location: Rosanky, Texas
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I'll probably get whacked again, but I think it's okay to stop the Durock above the lip and let the tiles hang down. Silicone would be a good choice in that area.

All backer board manufactures specify a moisture barrier between the board and the studs, either poly or tar paper.
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Old 12-05-2001, 07:35 PM   #3
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Join Date: Dec 2001
Location: new york
Posts: 2
Thumbs up

thanks for reply.
may i clarify the use of silicone in that area.
first, i've been told only 100% silicine. second, should i use the silicone as the grout line between tub & bottom of bottom row of tiles. finally, how about if i use a bead in the little if any gap between bottom of durock & top of tub flange.
thanks again
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Old 12-05-2001, 08:08 PM   #4
Bud Cline
Tile Contractor -- Central Nebraska
Join Date: May 2001
Location: Central Nebraska
Posts: 7,567
100% Silicone between wallboards and tub flange. Check for 100% contact top and bottom of silicone bead.

Then use only siliconized caulk between tile and tub. Siliconized caulk is much easier to work and finish. It can be finished perfectly with a wet finger or wet towel.
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Old 12-05-2001, 08:38 PM   #5
Rob Z
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You can mask off the tub and the bottom of the Durock, and pack it full of silicone. Peel the tape off, and avoid the mess!
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