Common Types of Squirrel Damage Squirrels can cause a great deal of damage to both the interior and exterior of your home. Squirrel damage includes chewing holes into the exterior of your home to get into the attic. Once inside you home, squirrels damage attics buy chewing wires, ripping up insulation and defecating in the attic. Squirrels damage trees in your yard by building their nests and gnawing on and eating the bark. How to Prevent Squirrel Damage In order to prevent squirrel damage to your home and yard, call the professionals at Critter Control! Our experienced specialists know how to safely and humanely remove squirrels from your attic. We will then seal the squirrels' entry points, ensuring that squirrels will not be able to enter into your house again and cause squirrel damage.