How to Fix and Prevent Squirrel Damage to Your Home

Hearing scratching noises in your loft at first light? Grey squirrels may have moved in. These invasive rodents can cause extensive damage to properties across the UK by chewing electrical wiring, nesting in insulation, and damaging gardens. If ignored, their presence can create fire risks, structural problems, and potential health concerns, leaving homeowners facing repair costs ranging from hundreds to thousands of pounds.
This guide explains how to recognise squirrel activity, repair the damage they cause, and protect your property using either DIY methods or professional assistance. Taking action early helps defend your home while also supporting the conservation of native red squirrels through responsible grey squirrel management.
Spotting Squirrel Trouble

Identifying grey squirrel activity early can help you avoid expensive repairs. Watch for the following signs to determine whether squirrels are present.
Common Signs of Squirrels
- Noises: Scampering, scratching, or gnawing in lofts or walls, especially at dawn and dusk.
- Droppings: Larger and rounder than rat droppings, often with a central bulge, found in lofts or gardens.
- Damage: Chewed electrical wires, torn insulation, gnawed wood, or holes in roof tiles.
Where Squirrels Cause Damage
- Lofts and Attics: Squirrels nest in high, safe spots, gnawing beams and wires, risking fire and structural damage.
- Gardens and Yards: They dig up bulbs, strip bark, and eat seeds, harming plants and trees.
- Walls and Insulation: Inside walls, squirrels shred insulation and chew cables, raising energy bills and fire risks.
Health Risks
Squirrel droppings and urine may carry leptospirosis and salmonella, posing health hazards. Inhaling dust from their waste can harm your lungs, so use protective equipment during cleanup.
“Grey squirrels can turn your loft into a health risk if not addressed promptly.” — Dr Jane Smith, Pest Control Expert
Statistic: Squirrel damage can cost UK homeowners between £500 and £30,000, with electrical repairs often the most expensive.
Checking the Damage

Carefully assessing squirrel damage helps determine the most suitable repair approach. You can either arrange a professional inspection or carry out a safe inspection yourself.
Hiring a Professional
Wildlife control specialists carry out thorough and dependable property inspections.
- Why It Helps: Professionals use tools like camera traps to locate hidden nests and entry points, leveraging their expertise in squirrel behaviour.
- What They Do: They check lofts for nests, roofs for holes, and wires for chewing, while assessing health risks from droppings.
DIY Inspection
If carrying out your own inspection, make safety your priority to minimise health risks.
- Stay Safe: Wear gloves and a mask to protect against diseases from droppings or urine.
- Where to Look: Inspect lofts, corners, and baseboards indoors; check trees, fences, vents, and soffits outdoors for entry points.
Fixing Squirrel Damage
Repairing squirrel damage quickly helps prevent further deterioration. Focus on sealing access points, replacing damaged insulation, restoring gardens, and cleaning contaminated areas.
Sealing Holes and Entry Points
Grey squirrels can squeeze through surprisingly small openings. Sealing these gaps helps prevent future access.
- Use 16-gauge wire mesh, sheet metal, or hardware cloth to seal roof or wall holes.
- Apply caulk for minor gaps, but consult a roofer for significant roof or soffit damage.
- Tip: Professionals can install one-way exclusion funnels to allow squirrels to exit without returning.
Replacing Insulation
Torn insulation increases energy costs and health risks.
- Replace damaged insulation promptly.
- For urine-contaminated areas, hire professionals to clean and sanitise, ensuring safety.
Restoring Gardens
Protect your garden from squirrel damage.
- Install squirrel-proof bird feeders to secure seeds.
- Cover bulbs with galvanised mesh and plant squirrel-resistant species like daffodils or marigolds.
- Use fencing or bamboo skewers to deter digging.
Cleaning and Sanitising
Squirrel waste spreads disease, so clean thoroughly.
- Use a 1:10 bleach solution or HSE-approved sanitiser on droppings and urine.
- Vacuum dust while wearing a mask to avoid inhaling harmful particles.
DIY vs Professional Squirrel Control

Should you tackle squirrels yourself or hire an expert? This table compares both options.
| Method | Pros | Cons |
|---|---|---|
| DIY |
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| Professional |
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Statistic: Professional squirrel removal costs £200 to £1,000, depending on infestation severity.
Stopping Squirrels for Good

Taking preventative measures against squirrel infestations can save both time and costly repairs. The following environmentally friendly and legally compliant methods can help keep squirrels away.
Natural Deterrents
Grey squirrels dislike certain smells and surfaces.
- Spray cayenne pepper and water or plant mint in gardens.
- Scatter coffee beans, human hair, or blood meal near plants.
- Tip: Reapply after rain for effectiveness.
Commercial Deterrents
Shop-bought solutions offer additional protection.
- Motion-activated sprinklers startle squirrels with water bursts.
- Ultrasonic devices emit sounds inaudible to humans but irritating to squirrels.
Regular Checks
Routine maintenance prevents infestations.
- Trim tree branches near roofs to block access.
- Inspect vents, chimneys, and eaves for gaps in spring and autumn.
- Early action can save £500 to £30,000 by stopping damage early.
UK Legal Requirements
Grey squirrels are invasive under UK law, requiring strict compliance.
- The Invasive Alien Species Order 2019 prohibits releasing trapped grey squirrels.
- Humane dispatch is mandatory, typically handled by licensed professionals to avoid penalties.
- Ecological Note: Controlling grey squirrels protects native red squirrels and woodlands.
When to Call an Expert?

Certain squirrel problems require professional assistance. Contact a licensed pest control specialist if you notice:
- Weak roofs or walls from gnawed beams.
- Chewed electrical wires, increasing fire risk.
- Urine-stained ceilings or contaminated water tanks.
Why Professionals Are Effective
BPCA-accredited experts resolve issues safely and legally.
- They use box traps or one-way doors for humane removal.
- They repair damage and provide prevention advice.
- They ensure compliance with the Wildlife and Countryside Act 1981 and Wild Mammals (Protection) Act 1996.
Choosing a Provider
Select a reputable pest control company.
- Look for BPCA or RSPH accreditation, insurance, and positive reviews.
- Ask about humane methods and prevention guarantees.
- Tip: Confirm they use exclusion funnels for lasting results.
Popular Questions About Squirrel Damage
What smells deter squirrels?
Grey squirrels avoid peppermint oil, cayenne pepper, and ammonia. Apply sprays or soaked cotton balls near entry points, lofts, or plants. Reapply after rain for best results. These humane, non-toxic deterrents complement other pest control methods.
How much does squirrel damage repair cost?
Costs range from £500 for minor insulation fixes to £30,000 for major repairs to wiring, roof timbers, or asbestos ceilings. A professional survey provides an accurate estimate.
Can squirrels cause fires?
Yes. Squirrels chew wires to manage tooth growth, exposing cables that may spark or arc, causing loft fires. Regular inspections and proofing reduce this risk.
Are squirrels dangerous to my health?
Squirrel droppings and urine may carry leptospirosis and salmonella. Use personal protective equipment (PPE) or hire a licensed pest controller for safe cleanup.
How do I squirrel-proof my garden?
Cover bulbs with galvanised mesh, plant daffodils, and use squirrel-proof feeders. Trim branches near roofs and secure compost bins to reduce access.
Is it legal to release grey squirrels?
No. The Invasive Alien Species Order 2019 prohibits releasing trapped grey squirrels. Licensed professionals must humanely dispatch them to protect native species.
How do I know if squirrels are in my loft?
Listen for scratching or gnawing at dawn or dusk. Check for droppings, chewed wires, or nesting materials. A professional inspection confirms their presence.
Conclusion
Although grey squirrels may appear harmless, their nesting and gnawing behaviour can cause extensive damage to lofts, gardens, roof structures, and electrical wiring, resulting in repair costs ranging from £500 to £30,000. Watch for early warning signs such as scratching noises or droppings, seal potential entry points with wire mesh, and use deterrents such as cayenne pepper to discourage future activity.
DIY solutions may be suitable for minor squirrel problems, but significant damage or electrical hazards should always be handled by BPCA-accredited professionals. Inspect your property regularly, and if you discover chewed wiring or other serious damage, contact a licensed pest controller before repairs become even more expensive. Acting quickly protects your home while helping conserve native red squirrel populations.
Squirrels causing chaos in your South Yorkshire home?
Contact Apex Pest Control, your trusted local BPCA-accredited and NPTA-certified specialists in humane squirrel removal. Call 0114 349 1098 today to arrange a professional inspection and long-term squirrel control solutions.












