Our electric bills have been $400 plus and I think I havefound one reason. I have a walkoutbasement that has a shop area and the shop is letting tons of outside air intothe crawl space. The exterior wall of the shop has no insulation at all and theinterior is partially insulated. In winterour main level floor is cold and summer our basement is warm. I am looking at blocking the air flow andinsulating the crawl space to the shop area. For other reasons I can not drywall the area, so I am trying my best tohelp reduce what I can. Attached is a picture of the area Area 1 is on the left where the studs go to all the way tothe top. My thoughts are to place thefoam board behind the studs and continue up with the fiberglass. I understand fiberglass doesnt block air and the foam boardwill do this. My hopes is that the combowill stop air flow and keep the temp and moisture controlled. Area 2 is on the right where the studs stop and the crawl spaceis open. Darn pipe is there. Thinking I could manage to install 3 layers ofthe foam board to get the R up to 15. FYI There is access to the crawl space on the other side ofthe house for repairs, so I can completely block this area off if needed. Any suggestions would be helpful!