Windows & Doors

Green building and construction principles focus on energy efficiency and windows and doors are a key component of keeping buildings and homes as energy efficient as possible.  Some aspects of energy efficiency to consider when choosing windows and doors are the energy star rating, insulated glass and gas filled windows, air infiltration, low-E (emittance glass), thermal efficiency, U-values (non solar heat loss or gain), SHGC (solar heat gain coefficient), and more.  Companies in this section offer green window and door options to help you make more environmentally friendly and energy efficient building choices.