I have to second Tom on this one... opening up that bathroom wall if there was no CBU - wow, new word, I always refered to it as wonderboard or (incorrectly as) shaft liner... you may notice you've been growing a crop of golden moldies back there.

I feel for you... I want to renovate an on-suite half-bath at home, but the S.O. has decided I don't have the skill set. Nothing like that vote of confidence.

Ray, can I get a "Sell the wife", please?

Bren R.