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Durock(?) again

Posted by JT on November 19th, 1998 09:45 PM
In reply to Durrock - again by Dave on November 17th, 1998 07:55 PM [Go to top of thread]

1 of 1 people found this post helpful

Dave, I don't know what you have on your walls, but
Durock (brand name for the cement board manufactured
by US Gypsum) is not black - it's grey with a cement-
like texture. There is a panel made by USG for
exterior stucco backing that is black; it looks basicly
like black drywall. It's not really intended for tile,
so who knows what it will do. If you have white grout,
I could see how there might be color variation where
the grout differs in density (a darker color might
work better) but then it could be some reaction with
the board surface.
If by separation at the corners, you mean cracked
grout, the fix is not to grout inside corners. Fill
them with a matching caulk (this is good practice
in any case).
I think the panel will need to be positivly IDed
before any real conclusion can be drawn. Even then,
if it is an unconventional backer such as mentioned
above, it may be hard to predict how it will perform,
especially with respect to it's water shedding capability.
Normally, a water proofing membrane is applied along
with cement board. The stucco backer can shed some
water, but ...
See what you can find out and post back.

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