How to Get Rid of Squirrels in Your Attic

Squirrels are loud, daytime-active, and stop completely overnight — the noise pattern is diagnostic. Rats are quieter and active at dawn/dusk and through the night. Raccoons sound enormous, vocalize (chirps, growls), and are nighttime-active. Squirrel droppings are oblong pellets larger than mouse droppings; raccoon droppings are tubular and the size of a small dog's. Get the ID right — raccoons need a wildlife control professional, not a DIY exclusion.

Eastern gray squirrels have two litter windows in most of the US: February–April and August–September. Excluding during a litter window strands flightless babies inside, where they die in walls and smell for months. If you hear high-pitched chirping or scratching that lasts hours without an adult presence, there are babies in there. Wait 6–8 weeks from the start of the litter window before excluding, OR open the attic and have a wildlife control specialist relocate the litter physically (it's a state-by-state rules situation).

Squirrels typically use one obvious entry but maintain backup holes. Daytime: watch the exterior with binoculars at dawn (peak activity) and note where they enter. Then walk the perimeter looking for: gnawed soffit corners (the most common entry), gable vents with bent louvers, roof-edge gaps where the fascia meets the soffit, chimney without a cap, plumbing-vent boots, where two rooflines meet at different heights. Mark every chew mark, even old ones — they'll be used again.

An exclusion door is a one-way flap or cone that lets squirrels exit but won't open inward. Mount one over the primary entry; do NOT seal any of the secondary entries yet — you'll trap squirrels inside if you only leave one exit and they don't all find it. Leave the door in place for 4–7 days of dry weather and check daily.

While the exclusion door is up, seal every other gap you found — but leave the main one alone. Hardware cloth (1/4-inch galvanized) covered by trim or replacement soffit board is what holds. Foam alone and quarter-inch plywood patches both fail; squirrels chew straight through them. Use stainless steel screws so the patches don't pull loose in a year.

Listen daily; sprinkle flour at the exclusion door so footprints tell you the direction of last activity. Once you've had 48 hours with no inbound prints and no scratching noise, the attic is empty. Confirm by entering the attic in PPE and looking at known harborage spots. Don't skip this step — a single trapped squirrel decomposing in a wall is a months-long stink problem.

Take down the exclusion door. Seal the main entry the same way you sealed the secondary ones — hardware cloth + screws + trim — and finish the exterior with paintable caulk and matching paint. This is the moment you stop being a temporary fix and become permanent.

Squirrels jump 8–10 feet. A branch hanging within that range of the roof is an invitation for the next squirrel. Prune back any branch within 8 ft of the roofline; ideally 10 ft to be safe. This is the single most important PREVENTIVE step and the one most homeowners skip.

Squirrels chew wires — this is not optional. Once the attic is empty, walk every visible electrical run with a flashlight and look for stripped insulation. Any exposed copper is a fire hazard. If you find damage, kill the breaker and call an electrician; don't tape over it. Insurance claims from squirrel-caused attic fires routinely run six figures.

Two squirrel highways most homes have unprotected: open chimneys and standard gable vents (the louvered triangles in the gable ends). Chimney caps prevent re-entry permanently. Gable vents need 1/4-inch hardware cloth installed on the INTERIOR of the vent, not the exterior — leaves clog exterior screens.

Squirrel-occupied attics have urine-soaked insulation, scattered droppings, and shredded nesting material. PPE (P100 + Tyvek + gloves), wet down before scooping, bag and trash, then vacuum with a certified HEPA. Replace insulation in any soaked sections. Enzyme deodorizer on stained framing removes the scent that draws the next squirrel back.