Thermal Envelope

Part 2 of Elements of an Energy-Efficient House. A thermal envelope is everything about the house that serves to shield the living space from the outdoors. It includes the wall and roof assemblies, insulation, air/vapor retarders, windows, and weatherstripping and caulking. Wall and Roof Assemblies Most builders use traditional wood frame construction. Wood framing is […]

Reducing Heat Loss and Condensation

Part 3 of Energy-Efficient Windows. Manufacturers usually represent the energy efficiency of windows in terms of their U-values (conductance of heat) or their R-values (resistance to heat flow). If a window’s R-value is high, it will lose less heat than one with a lower R-value. Conversely, if a window’s U-value is low, it will lose less […]