A long-overdue task!
Some weeks ago we heard animals, probably squirrels, in the crawl space underneath our singe-storey home. After some thinking about the problem we got a company to come out and take a look. They said that the original insulation was poorly installed, that would have been around 1977, and that it had to be removed and a more modern type installed.
The area, some 2,400 square feet, apparently is larger than the team usually work in and it may be five of more days before they are finished.
I do not envy the crew who spend long hours in the crawl space. The firm that was selected were TerraFirma.