Who coined the term "green building"? If not responsible for the term itself,... More
A national lobby for electric utilities is waging a state-by-state battle to hold solar energy back, according to a Washington Post report. More
The EPA's EnviroAtlas provides a one-stop reference for identifying everything... More
Roll over this interactive poster to see the requirements and deadlines for... More
The federal stimulus plan's energy tax credits for insulation are based on the 2009 IECC, which raises the wall insulation requirement for climate zones 5 and 6 from R-19 to R-20. To meet this requirement, the R-value of the cavity insulation must be at least 3.63 per inch. Does this mean that standard R-19 fiberglass batts used to insulate 2x6 walls would not qualify for the tax credit? How about Icynene, an open-cell spray foam with an R-value of 3.6 per inch? More
