A squirrel in the attic needs a way out before its entry hole is closed. Season matters because dependent young may be present; locking the mother out can leave animals inside, causing damage, odor, and frantic attempts to find another exit.
Confirm activity and the entry from a safe location
Observe from the ground or a window to see when the squirrel enters and leaves, and look for damage at eaves, vents, or roof edges. Do not walk on roofs or use high ladders to chase the animal when access is unsafe.
Check whether young may be present
Repeated sounds in one area, nesting material, and a female’s travel pattern can indicate young. In that situation, exclusion should wait or be handled by a professional who keeps the family unit together.
Provide an exit before sealing
A properly installed one-way exit can work when dependent young are not present and secondary entries have been secured. Do not use poison or seal the main hole while the squirrel is still inside.
Repair the opening with durable materials afterward
Once activity has stopped, repair fascia, screening, or siding and trim direct-access branches where practical. Inspect the attic for gnawed wiring, damaged insulation, and contamination before considering the problem resolved.
Sources
- U.S. Environmental Protection Agency (EPA) — Integrated Pest Management — Integrated pest management using sanitation, exclusion, monitoring, and targeted control.