Air and vapour barriers
What is a blower door test? What's the cost? How do you find a company to do one?
...blower door test?
Blower door tests are becoming part of many State and Provincial mandatory building codes - the new BC Energy Step Code in British Columbia, Canada is one example. A blower door test is often an essential part of a home audit, we don’t know for sure just yet if it will be part of the free home energy...