I-Home improvement

[Phil(Hot Rod Chevy)]

Castle,

I have heard and read a lot about vapor barriers in crawl spaces.

My personal opinion is that if there is plenty of ventilation under a house, a vapor barrier is not needed.

But during the winter, the vents are usually closed to save heat, so if that is the case, I can't see any reason not to add one.

I know of lots of real old homes that have never had vapor barriers under them, and if this one is 50 years old and has no structural problems, why is your sister worriied about it?

Phil