[turbo6bar]

Consider cellulose insulation as an alternative to spray foam. When consider cost to manufacture and impact to environment, cellulose is preferable to spray foam and fiberglass. You can utilize loose blown insulation or dense-pack cellulose.

I'm rebuilding a 60 year old home currently, and taking extra precautions during rough framing to allow dense pack cellulose in the walls and roof rafters (creating an unvented attic space. The forums at jlconline and greenbuildingadvisor are filled with great information and advice.
jurgen