The 3,200-square-foot duplex in Arlington, Mass., used roughly 1,400 gallons of home heating oil before being retrofitted for energy efficiency.
Installers had to figure out how to install the two layers of 3-inch rigid foam board on the roof. The product was 2 inches thicker than the roof foam they were used to.
The 10-inch screws used to secure the new roof deck, 6 inches of foam, and old roof deck into the rafters.
Even the underside of the house gets foam board in order to wrap the entire house in a protective skin.
Furring strips were attached to the foam board to create an air space behind the siding. The space promotes drainage, allowing the house to dry out.
The pre-finished cellular PVC siding is virtually maintenance free and will stand up to the elements. The holes provide movement for expansion and contraction.