I'm getting conflicting answers from contractors on installing a niche in my shower renovation. The wall I'd like to put it on is an exterior wall of the house. One contractor said he won't do it, and uses the pre-molded niche forms. He said it would get too cold in the winter. Another contractor said he does it all the time, but it's custom built (framed?) and they insulate it with 1/2" board.
What are your guys thoughts? Should it be done, or will I run into problems down the line. Last thing I want is a cold draft while taking a shower in the winter!