Hello everyone!
I have sometimes seen that foam sealant is used to seal joints between masonite boards, and between masonite and beams.
However, I can't figure out whether this is good or not.
The argument in favor is that moisture finds it harder to get into the insulation, and of course, it retains heat better if it's sealed.
The argument against is that if moisture does manage to get into the insulation, it gets trapped and finds it very difficult to get out.
Is there anyone who has knowledge or practical experience with this?
I have sometimes seen that foam sealant is used to seal joints between masonite boards, and between masonite and beams.
However, I can't figure out whether this is good or not.
The argument in favor is that moisture finds it harder to get into the insulation, and of course, it retains heat better if it's sealed.
The argument against is that if moisture does manage to get into the insulation, it gets trapped and finds it very difficult to get out.
Is there anyone who has knowledge or practical experience with this?
Did you get any response to this or did you figure it out yourself?
I have also seen that people use foam sealant to seal the air gap and also wonder why and if it's necessary.
I also can't see why one should do it.
I have also seen that people use foam sealant to seal the air gap and also wonder why and if it's necessary.
I also can't see why one should do it.
I suspect they do it because it is quick and easy.
Haven't done it myself, but when I redid the floors down to the crawl space in our first house (built in the early 1800s), I laid the subfloor with K-plywood, and sealed joints between boards and against beams with acrylic sealant. This was to stop drafts since the house was drafty with very cold floors. The crawl space wasn't particularly airtight. And it got much better! Water getting into the bottom beams is probably not the main concern.
Haven't done it myself, but when I redid the floors down to the crawl space in our first house (built in the early 1800s), I laid the subfloor with K-plywood, and sealed joints between boards and against beams with acrylic sealant. This was to stop drafts since the house was drafty with very cold floors. The crawl space wasn't particularly airtight. And it got much better! Water getting into the bottom beams is probably not the main concern.
Mostly to stop drafts, and as KnockOnWood mentioned, if water is getting into the floor joists, you have significantly bigger problems than it being sealed with foam...
Thank you for the answers