I am getting quotes on having my crawl space redone using foam instead of the fiberglass that is there now. The first guy wants to spray foam over the exterior walls sealing everything from the exterior band, down to dirt. Then they would cover the ground with a moisture barrier. I was assuming we would spray the foam in between the joists, but his way seems to be the most common method. As I have a very tall crawlspace on the backside of my house, I use this for lawnmowers etc and hate to lose it for storage. I realize spraying between the joist makes future repairs problematic. Any opinions or advice appreciated. BTW, I am in coastal NC and have moderate weather, but it still gets cold and hot seasonally.