The basement walls are going up. The walls will be 12” thick – 5” of concrete, 3” of DOW Styrofoam, and another 4” of concrete. We choose the the Thermomass Building Insulation System by Composite Technologies Corporation because of the high energy efficiency and price. Weather permitting, we should pour the concrete for the basement tomorrow. Last week, we laid the basement plumbing lines, installed the geothermal lines from outside the home to the mechanical room and continued to install the forms for the basement walls. As part of the basement plumbing, we installed four 4” lines to carry rain water from the roof to the 20,000 gallon rain harvest tank. We added three 6” vent openings (pool bathroom & guest bathroom, theater bathroom and mechanical room) into the walls today. We are going to install the electric panels in the safe room so we added several 2” openings in the roof of the safe room. We are still trying to figure out how to have a wood burning, kiva, style fire place and still meet the standards of EPA Indoor airPLUS please contact us.