Packing heat
Here homeowner and builder Simon Hare shows off a cross section of a structural insulating panel which provides the bulk of the insulating value. The walls and roof were made by erecting these 12-inch-thick panels, which are made by placing foam insulation between two plywood sheets. After they are put up, the builders sealed the joints with foam and tape to minimize air leakage. With this "exoskeleton" in place, builders then hang joists and studs from the inside.
The structure insulates and creates an envelope that can be sealed. Altogether the insulating value will be R45, many times higher than a typical home. By making a home well insulated and sealed, you can dramatically cut down on the heating and cooling requirements.
July 24, 2009 4:00 AM PDT
Photo by: Martin LaMonica
