Thermal mass: More than 30 tons of plaster and other mass on the inside of the house collects and stores heat from sunlight.
Forest-certified lumber: Along with local posts and beams, we used wood certified as sustainably harvested.
Recycled vinyl shingles: Located on the one "traditional" roof that holds our solar panels, these shingles are made from 80 percent post-consumer recycled material and will last more than 50 years.
Straw-bale walls: These fire-resistant, agricultural waste products (not hay) provide 18 inches of cheap insulation, keeping the house warm in winter and cool in summer.
Reclaimed doors, windows, and kitchen cabinetry: Most of the doors and windows are reclaimed from predemolition sites.