There are many important steps to prevent a tree squirrel infestation inside the home. It is recommended to seal all possible points of entry around the house, including small openings and cracks around doors and windows. Screen vents and openings to chimneys. Keep food in airtight containers and dispose of garbage regularly. Keep tree limbs cut back 6 to 8 feet from the roofline. Inspect wires, insulation and walls for any signs of gnaw marks, which may indicate an infestation If you find feces, hear sounds of scurrying in the walls or observe other signs of an infestation, contact a licensed squirrel control professional to inspect and treat the pest problem. To avoid rodent bites, have a specialist handle squirrel removal.