Before we got our new roof, fox squirrels would sometimes find weaknesses and chew their way into our roof. Of course, between the roof and the ceiling is where much of the house's wiring is. Squirrels like to chew.... get the picture? Therefore, we ordered new shingles/made other repairs to our house. It took awhile for the shingles to come though, and in the interim, in order to protect our house/wiring, we had to keep the damn things away.