The name calling, insults, and arguing make you both look like idiots
and made me think neither of you were really right.
"Millions of homes have only insulation board for sheathing too, but
doesnt' make it somehow "right"."
Actually, yes, with cross bracing in the framing this would be a
correct application to meet code in many areas of the country, and it
actually performs quite well when done correctly.
Tile over plain gypsum sheet rock or green/blue board is just a bad
idea in area where there is water...with a caveat or two. It can be
done in conjunction with products like Schluter's Kerdi and Ditra.
If you're tiling in a wet area, a CBU should be used. And, despite
what's been written here, almost any tile job will eventually fail.
It's just a question of time. Even a tile job on Green/Blue board will
last for some time, even in a shower. It was common practice to tile
over Green/Blue board for many years, but anyone who still does it is
probably too arrogant to realize that we learn from out mistakes. Our
mistakes? Yeah...despite what the one guy has said, the industry has
changed because most green/blue board tile jobs in wet areas have
Recent example? I'm in the middle of a 4 bathroom makeover in a house
my friend recently bought. He got a hell of a deal on it. Didn't
realize until the first wall fell on his kid that it was because of how
the bathrooms were built. All the tubs and showers were built with
green board 12 years ago and they're all falling apart now. ALL OF
I've spent much of my life working in this industry and can say,
without reservation, the only acceptable backer in a wet area, as far
as I'm concerned is a CBU...Cementitious Backer Unit, i.e. HardiBacker,
Wonderboard, Durock. You can go a step better and simply float a wall
with lathe and mud, but most folks aren't interested in spending that
kind of money. As far as gypsum goes, I can't say as I would ever use
it. However, I have heard some guys swear by Denshield for stone
walls/floors where there's no real question about whether or not a lot
of moisture will get through. Then again, those guys that swear by it,
in my experience, are also the ones selling it.
Would I rip out an existing installation over green board to put in a
CBU backed installation? Not until it failed or I got tired of looking
And...quit the childish fighting?
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