These are the most common nuisance animals that wildlife contractors encounter and one that can cause the most damage to dwellings. Squirrels often gnaw holes in siding and fascia to access attics and or den areas. In attics, squirrels can damage vents, insulation and electrical wires (fire hazard). Squirrels often gnaw multiple holes once established creating more damage to the dwelling. Because of their gnawing, they can cause structural damage to roof load bearing rafters.
Squirrels often access dwellings by crawling across electrical or telephone wires which can result in shorting out or causing transformers to explode which results in power outages. Squirrels can also cause significant damage to trees, landscape, and lawns.
With two breeding seasons for squirrels and having three-four young per litter, they can increase in population very quickly. With increasing population within the dwelling, the damage can increase rapidly.