Plumber suggested using foam in this bay (with a water supply for a standing tub filler) because it was better than batts of insulation in stopping cold air movement, hence preventing freezing.
I thought that blow in foam insulation didn't have a high R value compared to fiberglass. Unless he meant a foam similar to a Great Stuff formula.
What would you use?
Best Answer
Based on the word foam I would imagine he means the stuff similar to great stuff which does have a higher R value. Is the pipe partially insulated? I'd be worried about the fact that its directly on the drywall that's next to the un-insulated area. The down side to the foam if something goes wrong you won't be able to get in.