On 19 Apr 2006 18:36:42 -0700, wrote:


wrote:
Also not a Pro.

Between the pan and bottom row caulk.

In corners, I would also caulk. Some claim that if it is a mud wall (
tile set in a mud (mortar) base that is 2-4" thick then you could
consider grout. If you are using cement backer board or Sheetrock (a
real mistake) then definitely caulk.

For inside corners, I would mot miter the tiles. Just maintain a
consistent gap. For outside corners, I would use the special end cap
pieces or miter if necessary.

Thanks. That's what I read in the "bible of tiling" by Micahael Byrne.
It just seems really odd because an entire seem (a corner) that gets
pegged with water while in the shower, sealed with caulk just seems
"flimsy" to me for some reason. (I do understand the concept of the
expansion joint though.) It's just the water aspect of it that seems
odd. The other thing is that when I look at other bathrooms I never
see calk at these two joints - even by self proclaimed pros.

If you use silicone or polyurethane caulk, it's more waterproof than
grout. Especially grout that's cracked because the joint is moving
from expansion and contraction.

If you've read Byrne, then you know you should have a waterproof
membrane behind the backerboard anyway, and it should wrap the corners
so there is no seam there.

Seems like overkill, I know, but if you want it to last a long time
without leaks, it's a tried and proven method.

Good luck with your shower,

Paul