Signs of Raccoons in the Basement Raccoons enter basements to escape the elements, find warmth, and give birth to young. Once they've settled, raccoons will make many noises that alert residents to their presence. For example, squeaking, shuffling, and hissing may be heard from basements. As raccoons are nocturnal, their vocalizations are louder and more frequent during evening hours. Additionally, individuals may encounter raccoon latrines, a sure sign the pests are somewhere in the house. Entry Points & Damage Done Common basement entry points include gaps where utility cables and pipes run into homes, holes near building foundations, open vents, and furnace chimneys. Once infestations of raccoons in basements are established, the pests cause plenty of damage by entering and exiting den areas in search of food. The widening of existing holes weakens the foundation of homes. Furthermore, the pests' droppings are hazardous to human health as feces contain raccoon roundworm. The parasite is fatal to humans. Exclusion & Removal Habitat modification helps keep raccoons out of basements. Seal off any potential entrances and cap furnace chimneys by installing approved chimney caps or raccoon screens (see the image below). If infestations are already settled, frightening devices paired with different lighting can discourage raccoons from staying in basements. However, since these methods of control only work occasionally, removal requires professional assistance. The professional wildlife experts at Critter Control safely and humanely remove problem raccoons from basements with efficiency and in accordance with local wildlife laws.