Many people think of roofs when they think of spray foam, but you don’t need to have a flat or low-slope roof to take advantage of the money-saving benefits of spray foam.
25% of heat loss in a typical three bedroom home is through an uninsulated roof. If you have a typical attic, your attic insulation is on the floor and the air is allowed to freely flow through your attic space. By simply adding spray foam insulation to the underside of your roof deck and closing up the air flow you can save money and decrease the risk of ice damming at the same time!
35% of typical home heat loss is through uninsulated walls. Many people ask about injecting foam into wall cavities behind dry wall, but this is not a good idea; the expanding foam will actually push your drywall away from your wall. There are some cases where spray foam wall insulation makes huge sense, however. If you have a room with wood paneling, the paneling can be removed, spray foam insulation installed, a fire barrier installed, and the paneling replaced. If you are adding an addition, spray foam insulation will likely make the new room(s) the most energy efficient and comfortable in the house.
In some cases it makes sense to remove the drywall and install spray foam. Many 70’s era or earlier houses with drywall were installed with substandard or no insulation in the walls. In some cases this is obvious; we’ve seen cases where the inside wall ‘sweats’ in the winter and ice forms along the baseboard. Another case can occur when the building structure has been compromised, such as through a leaking roof, and the insulation then degrades. If you have a room that’s particularly cold in the winter or warm in the summer, then it may be experiencing one of these problems, and may be a good candidate for removing the drywall and installing energy efficient spray foam insulation.