No matter where you live, one of the best ways to improve energy efficiency in your home is to secure or re-enforce your Thermal Envelope. The Thermal Envelope is the combined effect of your existing windows and doors, wall and roof assembly, weather-stripping, insulation and air retarders.
In short, every component of your home interior and exterior builds an envelope that separates your living space from the elements. Skimp on any of these factors or allow them to fall into disrepair, and you’re adding to your year-round utility bills.
Photo by Dean of Green
The Federal Citizen Information Center (FCIC) contends that insulation is a critical factor in securing the thermal envelope. You should strive, where possible, to install products with higher insulation R-values than those required to suit local building codes.
Consider that the insulation of foundations and slabs is also critical in putting a seal at the bottom of the residential envelope. In