How to Get Rid of Squirrels in Your Attic Safely

Last updated: November 2026

Fast scampering overhead at sunrise. Chewing sounds near the eaves. A squirrel slipping under a roof tile in the afternoon. If that sounds familiar, you probably have squirrels in the attic, and you want them gone without making the problem worse.

This guide explains how to rid an attic of squirrels the safe way: what to check first, what not to do, how humane exclusion and repair fit together, and what cleanup may be needed once the animals are out. It is written for Orange County homeowners, so it uses California wildlife guidance rather than rules from other states.

How to Rid an Attic of Squirrels: The Safe 4-Step Order

The safe way to get rid of squirrels in the attic follows a fixed order. Skipping a step is how most DIY attempts fail or create new damage.

1. Identify the animal. Confirm the activity pattern and signs point to tree squirrels, not rats, raccoons, or bats.
2. Check for young. Look for a nest and listen for babies before you disturb or block any entry point.
3. Get the squirrels out humanely. Use exclusion that lets adults leave on their own, ideally handled by a qualified wildlife professional.
4. Repair, clean, and confirm. Seal entry points, assess attic damage, and recheck for renewed activity.

Confirm the Signs Before Assuming It Is a Squirrel

Tree squirrels are active during the day. The UC Statewide IPM Program's tree squirrel guide notes they are most active in early morning and late afternoon and do not hibernate. Noise that starts around sunrise and settles at dusk points toward squirrels. Heavy thumping late at night is more typical of raccoons or opossums, and light scratching after dark often points to rats.

Sound is a clue, not proof. Look for supporting evidence before deciding on a plan.

Check for a Nest or Young Before Disturbing an Entry Point

Tree squirrels in California typically breed in late winter or spring, and some species have two litters a year with three to five young each, according to UC IPM. Baby squirrels cannot leave the nest on their own for several weeks. If you seal the hole while they are inside, they can die in the attic, and a determined mother may chew a fresh opening in your roofline to reach them.

High-pitched squeaking or chirping near the eaves, or a bulky nest of shredded insulation and leaves, are strong signs that young are present.

When to Stay Out of the Attic and Call for Help

Stop and call a professional if you hear babies, can't find the entry, the entry is on a steep or second-story roofline, or you see droppings, chewed wiring, or damaged ductwork. A cornered squirrel can bite and scratch, and attics hold their own hazards: exposed nails, fragile ceiling drywall, and contaminated insulation.

How to Tell Squirrels From Other Attic Wildlife

Species identification changes the safe response. Methods suitable for squirrels can be wrong, or even illegal, for other animals.

Daytime Scampering, Chewing, Nesting Material, and Other Clues

Common signs of squirrels in the attic include:

• Running or rolling sounds during daylight, often near the edges of the attic
• Gnaw marks on fascia boards, soffits, roof vents, or wood trim
• Shredded insulation, leaves, and twigs bundled into a nest near the eaves
• Droppings and urine staining on insulation or stored items
• Squirrels seen jumping from trees, power lines, or fences onto the roof

Roofline, Soffit, Fascia, and Vent Entry Points

UC IPM notes that squirrels often invade attics through gaps or broken vent screens and can enlarge a small opening by gnawing. Because they travel along utility lines and fence tops, entries often sit at roughly those heights. Check where roof sections overlap, where the fascia meets the roof edge, under tile ends, around gable and attic vents, and around utility penetrations.

What Not to Do When Squirrels Are in Your Attic

Well-meant shortcuts are the most common reason squirrel problems drag on. Avoid these.

Why Sealing an Opening Too Early Can Make the Problem Worse

Blocking the main hole while squirrels are inside traps them. Adults will chew a new way out, often through a spot that is harder and more expensive to repair. Trapped young can die in the attic and cause odor and contamination. Seal only after you have confirmed the space is empty.

Why Trapping or Relocating Is Not a Simple DIY Fix

California treats tree squirrels differently from many other states. UC IPM explains that tree squirrels are classified as game mammals under the California Fish and Game Code. Eastern fox squirrels damaging property may be controlled by the owner or tenant, but gray squirrels require a permit from the California Department of Fish and Wildlife. Releasing a tree squirrel elsewhere is illegal without a CDFW permit, and poison baits are not legal for any tree squirrel species.

Poison is a bad idea even beyond the law. The National Park Service in the Santa Monica Mountains warns that rodent poisons have been found in bobcats, coyotes, mountain lions, hawks, and owls, and can harm pets and children. A squirrel that dies inside a wall or attic also leaves you with an odor problem.

Ultrasonic devices and repellents rarely solve the problem either. UC IPM reports squirrels quickly get used to frightening devices, and repellent effectiveness is questionable.

Safe Ways to Get Squirrels Out of the Attic and Keep Them Out

The right method depends on the species, whether young are present, how many entries exist, and how safely the roofline can be reached. Here is how a careful, humane process works.

Inspection and Confirmation That the Attic Is Clear

A thorough inspection maps every possible entry, not just the obvious one. The inspector looks for the nest, checks for young, and notes damage. To test whether an entry is still in use, UC IPM suggests loosely plugging it with crumpled newspaper; if a squirrel is still inside, it will push the plug out.

Humane Exclusion and Repair After the Animals Are Out

When no dependent young are present, exclusion typically means sealing secondary gaps first, then fitting a one-way exit over the main entry so squirrels can leave but cannot return. If babies are present, the safest choice is usually to wait until they are old enough to leave or to have a professional manage the family so the young are not orphaned.

Once the attic is confirmed empty, entries should be closed with materials squirrels cannot chew through. UC IPM recommends sheet metal or 1/4-inch hardware cloth. Foam, caulk, or plain window screen alone will not hold.

Follow-Up Checks for Renewed Activity

Watch and listen for a couple of weeks after sealing. New noise can mean a squirrel was missed or another one is testing a weak spot. Trim tree branches that overhang the roof to slow access, as UC IPM advises.

What Happens After Squirrels Leave the Attic

Getting the squirrels out is only half the job. What they leave behind can affect your home's air quality, energy efficiency, and safety.

When Damaged Insulation or Contaminated Material Needs Attention

Squirrels tear insulation for nesting and leave droppings and urine behind. UC IPM notes tree squirrels can carry diseases such as tularemia and ringworm and are often infested with fleas and mites. Localized mess may only need targeted cleanup. Widespread contamination or compressed, soiled insulation may need removal, decontamination, and replacement. The scope should follow what the inspection actually finds.

Why Wiring or HVAC Concerns Need an Appropriate Specialist

Squirrels gnaw constantly, and chewed wiring is a real concern. If you see exposed or damaged wires, have a licensed electrician inspect them. Damaged ductwork can spread odors through the HVAC system and should be checked as well.

When an Orange County Wildlife Professional Makes Sense

At Orange County Attic CleanUp, we handle the full sequence under one roof: humane removal, extraction of contaminated material, decontamination, entry-point sealing, and fresh insulation installed to current Title 24 efficiency standards. Our technicians are licensed, bonded, and insured, and we have served Orange County homes for more than 20 years, from Irvine and Anaheim to Huntington Beach and Mission Viejo.

What to Ask Before Hiring a Wildlife Removal Company

• How will you confirm whether baby squirrels are present?
• Will you inspect the whole roofline, or only the obvious hole?
• What materials do you use to seal entry points?
• How do you follow California rules for tree squirrels?
• Will I get a written scope covering removal, repair, and cleanup?
• Can you show proof of licensing and insurance?

What Affects the Scope and Quote

Every attic is different. The number of entry points, roof height and type, whether young are present, the extent of insulation damage, and the cleanup needed all change the work. That is why we start with a free inspection and quote rather than a one-size price.