Expanding Foam Insulation

Although the emphasis on saving home heating and cooling energy has been on attic insulation, exterior walls have a similar surface area that transmits energy. Homes built prior to 1960 had no insulation or at best R-5. Between 1960 and 1980′s average R values increased to about R-11. Insulating wall cavities that were empty or [...]

Convection is another source of heat transfer when air moves between two spaces. Minimizing or controlling losses via convection is desirable but requires more consideration. Adequate outside air is necessary for breathing, and sufficient air transfer is required to ventilate other gases and odors from interior spaces.