The blower door depressurizes the house and measures exactly how much air is leaking through it, in the same units your utility uses to talk about efficiency. The infrared camera then shows where - a wall missing insulation reads distinctly colder on camera than the wall next to it, no demolition required.
Compressed or gappy insulation shows up on infrared too. A bag of insulation states a coverage depth, but insulation squeezed under stored boxes or left thin over a joist loses most of its rated value - the audit catches that even when the attic looks fully covered from the hatch.
Many utilities subsidize part or all of the audit, and some rebate programs cover a share of the sealing and insulation work that follows it. We check what applies to your address before we quote, so the number you see already accounts for it.
