Introduction: Understanding Attic Squirrel Infestation

An attic squirrel infestation can turn your quiet home into a noisy and hazardous space. Squirrels are attracted to attics for warmth, safety, and nesting. While charming outdoors, inside your home they can gnaw wires, damage insulation, and spread diseases. Understanding how to identify and prevent an attic squirrel infestation is critical to protecting your property and your family’s health.

For more on general pest prevention, see our Home Pest Prevention Guide.

Why Attics Attract Squirrels

Shelter and Safety During Winter

Your attic offers warmth, security from predators, and a quiet area for nesting. This makes it an ideal place for squirrels, leading to a potential attic squirrel infestation.

Nesting Materials and Food Sources

Squirrels create nests, called dreys, from natural materials or shredded attic contents like insulation and paper. Their gnawing can damage wiring, wood, and plastics, making early detection essential.

Rapid Reproduction

A single squirrel can quickly escalate to a full attic squirrel infestation, as they produce two litters per year.

Spotting Signs of an Attic Squirrel Infestation

Persistent Noises

Squirrels are active during the day. Listen for:

  • Scurrying or scratching in the attic
  • Chewing or gnawing noises
  • Rustling of nesting materials

Visual Evidence

  • Damaged Entry Points: Jagged holes, fresh gnaw marks, or greasy smudges near roof edges or vents
  • Nests: Twigs, torn fabric, or shredded insulation in corners
  • Tracks and Smudges: Front paw (4 toes) and back paw (5 toes) prints with claw marks

Waste and Odours

  • Droppings: Dark, pellet-like droppings in attics
  • Odours: Ammonia-like smell from urine or faeces

For DIY attic cleaning tips, check our Attic Restoration Guide.

The Hidden Dangers of an Attic Squirrel Infestation

Property Damage

  • Electrical Wiring: Gnawing poses a fire hazard
  • Insulation: Damage reduces energy efficiency
  • Structural Damage: Beams, rafters, fascia, and soffits may weaken

Health Risks

  • Contamination: Squirrel droppings carry bacteria and parasites
  • Secondary Pests: Fleas, ticks, and mites may infest your home

Professional vs DIY Approaches

Professional Expertise

  • Experts provide humane removal and prevent re-entry
  • Follow local laws and permit requirements for relocation

DIY Challenges

  • Ineffective materials like spray foam or steel wool
  • Handling risks: bites, diseases, or inhumane outcomes

For safe DIY methods, see our Wildlife Deterrents Page.

Humane Removal Strategies for Attic Squirrel Infestation

One-Way Doors

  • Allow squirrels to exit but prevent re-entry
  • Avoid using if babies are present

Live Traps

  • Peanut butter is effective bait
  • Relocation should follow humane guidelines

Temporary Deterrents

  • Scents: peppermint oil, vinegar, garlic
  • Lights/Sound: motion-detection lights or loud music

What NOT to Do

  • Avoid poisons, glue traps, drowning, suffocation, and other inhumane methods

Repairing Damage After an Attic Squirrel Infestation

Sealing Entry Points

  • Use steel mesh, hardware cloth, or galvanized flashing
  • Seal holes only after confirming all squirrels have left

Attic Restoration

  • Remove feces and urine with protective gear
  • Disinfect and deodorize the attic
  • Replace damaged insulation
  • Inspect electrical wiring and hire a licensed electrician
  • Repair structural damage to beams, joists, and siding

Long-Term Prevention

  • Trim tree branches 6–8 feet away from your home
  • Secure food sources: bins, bird feeders, and pet food
  • Install chimney caps and vent covers with fine mesh
  • Conduct periodic inspections of rooflines, vents, and foundation
  • Declutter yards and storage areas

Cost Considerations & Insurance

  • Professional Removal: £160–£480 ($200–$600 USD)
  • Inspections: £80–£120 ($100–$150 USD)
  • Repairs: £80–£1,000+ depending on damage
  • Insurance: Most policies do not cover squirrel damage