Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

In particular, I'm trying to insulate my loft. I'm not keen on the idea of taking a naked flame up there!

share|improve this question
up vote 5 down vote accepted

You can have a blower-door test done (or rent a blower and do it yourself). Basically you close all your doors/windows, and then stick a big fan in your doorway (sealed), then have it blow air outside. It creates negative pressure inside your house, amplifying any air leaks. I had this done as part of an energy audit (and when it was fairly cold outside), and just walked around using my hand to feel for any leaks (they are pretty obvious, because it is like a jet of cold air shooting in).

share|improve this answer
Using a feather during the test will help find drafts around windows and doors. – richardtallent Jul 30 '10 at 3:57
If you get your fingers wet, you can feel the draft better as well. – Scott P Jul 31 '10 at 16:06

An IR Thermometer could be useful, and they are getting rather cheap. A Thermal camera would be great, but they cost a couple thousand dollars.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.