I recently moved into an old brownstone and realized that there is a cockroach issue in the entire building. I'm working on getting rid of them but the other night I noticed some were near the ceiling above my shower.
There is a pipe in the corner of the shower that is a couple inches thick and runs up to the ceiling. Where it connects to the ceiling there is a large gap on all sides. I want to seal it.
Any suggestions? I was told steel wool and expandable foam, but want to know if that is sensible to do right above the shower where it is likely to be humid.