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
In December 2010, I had my entire EJ home, including the basement insulated by The Insulation Man. Pat Dundon came highly recommended by several people. These recommendations did not disappoint.
Diane M., Johnson city, NY