Air and vapour barriers
What is a blower door test? What's the cost? How do you find a company to do one?
...energy advisor certified by Natural Resources Canada (NRCan). In the United States, you'll want to search for a certified professional from the Building Performance Institute (BPI) or a RESNET (Residential Energy Services Network) HERS Rater.
These folks are trained and certified as energy auditors to perform proper en...
