We have gotten to work with local architect Kimberly Marland on a number of projects. This passive solar, Energy Star house was the first home we built for her and her family. The home features a Superior Wall precast foundation and structural insulated panels (SIPs). The mass for storing the sun’s energy for night is provided by the 3” thick concrete floor. The thin design allows the low angle winter sun to penetrate the full depth of the house. The appropriately sized overhangs shield the summer sun from heating the house. The yearly energy bills average only $1,800 for this 3,000 square foot home.