Spray foam insulation to prevent condensation? (1st post)
So no thoughts? Or is the question just absurd?
Here's my thought process:
- The pipe is definitely attracting condensation. I think that the proof is in the rust on the steel pipe holders (which are getting replaced with plastic) and the obvious stains on the wood right next to the pipe. It's also pretty evident when you look at the toilet. After flushing, the whole outside of the toilet attracts condensation! This is an interior wall, though it is perpendicularly connected to an outside wall. There is no insulation in the stud cavity.
- I think that somehow insulating the pipe would be a good idea to minimize the amount of warm air that can get to the cold pipe and cause condensation.
- I'm thinking, however, that spray foam may not be the best because it would completely seal in any condensation that does form and potentially cause issues. As I understant it moisture and heat can pass through wood pretty easily, so if I seal up one side of the pipe with spray foam is it possible that moisture accumulates right up against the wood and causes rot?
- I can half insulate it with some of the black foam pipe insulation, but it's difficult to get it secured to the pipe.
- My other thought is to slide a sheet of plastic in-between the pipe and the wood stud and then use the spray foam. The objective being to separate the pipe from the wood so that if condensation does form hopefully it doesn't sit up against the wood. The only downside of this way is that if condensation forms at all it won't have anywhere to go...
So maybe the right choice is to just leave it be and hope that as condensation forms it just evaporates as it has for the last 40 yrs?