Think about it: webs catch insects that intrude in your home through air holes. So if a spider is smart, where does he put his web?
You guessed it: by the air leaks. If you find spiderwebs in your house, theres a good chance there's an oppertunity for air sealing.
Testimonials
wanted to write you promptly. Your employees were diligent, and appeared to do a very thorough job packing more insulation into our attic spaces. Very clean as well. Can't thank you enough for taking care of this small issue, though it is important to us.
J.M. Greene