I recently got a quote of about $5500 to seal my crawlspace. I can come up with enough time to tackle this job myself. Just had a couple questions for everyone, how do you seal all the pieces of plastic or do you need too? Do I need to insualte the walls of the crawlspace (they are concrete blocs)? How do you seal it to the joist?
There are about a million and one threads on crawlspaces and additional resources online from buildingscience.com and other folks.
The short answers to your questions are:
- yes you need to seal the seams
- yes you need to insulate the wall (if you are converting to a conditioned crawl space)
- yes you need to seal the bands and many folks use a combination of rigid and spray foams.