We will be using SIPs (Structural Insulated Panels) for the exterior and roof of the house. Although the cost is a bit more than conventional framing and cellulose insulation, the benefits are numerous: Increased insulating value with foam, straight and plumb walls (presumably), and reduced waste. Unfortunately, however, you cannot use recessed cans in the roof panels at the 2nd floor level, so we’ll make some adjustments to the original lighting scheme.

Note: For information on SIPs, visit