I live in the Mid-Atlantic and recently had a home energy audit and discovered that I had a great deal of energy loss, particularly in my attic space. I contacted some weatherization contractors, one who is proposing a closed-cell foam insulation that will be sprayed onto the underside of my roof (rather than between the joists that hold up the ceiling). The goal here is to create a sealed environment that becomes "conditioned" as the house does and create an air block that will help better maintain temperatures in the living areas of the house. I know I need to be concerned about the roof and shingles and that it would add expense (the roof is a bigger space than the ceiling), but was interested to find out if there was anyone who has any knowledge, recommendations, or assistance relative to this proposal. I have nothing moving through my attic space other than electrical wiring, so I don't need to be concerned about HVAC duct work.