Some photos from a 5500 sf home that had a blower door test done today. I work with a bpi guy when he has some bigger projects. Pretty interesting to see just where all the air comes from.
The question now is - what was done to remedy this situation, if anything.
Gabe
Sean, it would be interesting to see the same IR pics with the blower door shut down and compare the leakage. Good pics by the way.
I always love the “crawl” effect of exceptions when used with a blower door.
Charles, the answer to your question depends on the natural pressure of the structure. In addition you still might see the IR exceptions in the lower half of the structure but not the upper half due to stack effect. A blower door eliminates these effects.
If the building is under a natural positive pressure the IR inspector could be missing a lot.
JJ