Squirrels may look harmless outdoors, but once they find their way into your home, they can cause significant damage. In Chicago, squirrels frequently enter attics and roof spaces in search of warmth, shelter, and a safe place to build nests. While the sounds of scratching or running overhead may seem like a minor nuisance, the damage hidden behind walls and above ceilings can become costly if left untreated.
Understanding how squirrels damage roofs and attics can help homeowners recognize the warning signs early and know when it’s time to consider professional squirrel removal Chicago services.

Why Squirrels Choose Roofs and Attics
Attics provide many of the same advantages as natural tree cavities. They are warm, dry, protected from predators, and usually undisturbed for long periods.
Squirrels commonly enter homes because they find:
- Safe nesting areas
- Protection from harsh Chicago weather
- Easy access through roof gaps
- Nearby trees that provide convenient access
Once inside, squirrels often return season after season if entry points remain open.
How Squirrels Access Chicago Homes
Many homeowners are surprised by how easily squirrels can enter a house. They are excellent climbers and can jump several feet between trees, fences, and rooftops.
Common entry points include:
- Damaged soffits and fascia
- Roof vents
- Loose shingles
- Chimneys
- Gaps around rooflines
- Openings near utility lines
Even a small gap is enough for a squirrel to squeeze into an attic.
Roof Damage Caused by Squirrels
One of the first areas squirrels damage is the roof itself. To create or enlarge an entry point, they often chew through roofing materials.
Common roof damage includes:
- Torn shingles
- Damaged fascia boards
- Chewed wooden trim
- Broken roof vents
- Enlarged gaps around soffits
Over time, these openings allow moisture, insects, and even other wildlife to enter the home.
Attic Damage Can Become Expensive
Once squirrels establish a nest, the attic often becomes the center of their activity.
They may:
- Tear insulation apart for nesting material
- Compress insulation, reducing energy efficiency
- Scatter nesting debris throughout the attic
- Leave droppings and urine behind
These issues not only affect the home’s condition but may also increase heating and cooling costs.
Chewed Electrical Wiring Creates Fire Hazards
One of the most serious risks associated with squirrels is their habit of chewing.
Because squirrel teeth continuously grow, they gnaw on many materials, including:
- Electrical wiring
- Wood framing
- Plastic piping
- Storage boxes
Damaged electrical wires increase the risk of short circuits and potential house fires, making early intervention especially important.
Structural Damage Over Time
A squirrel infestation rarely stays confined to one area.
As squirrels move throughout the attic, they may damage:
- Roof decking
- Wooden beams
- Ventilation systems
- Insulation barriers
The longer squirrels remain inside the home, the more extensive and costly repairs may become.
Warning Signs of Squirrels in Your Attic
Early detection can help prevent major structural damage.
Watch for signs such as:
- Scratching or running noises during the day
- Droppings in the attic
- Chewed wood or wiring
- Visible roof damage
- Nesting materials near insulation
- Squirrels frequently entering or leaving the roofline
If you notice these warning signs, it’s important to act before the infestation grows.
Why DIY Removal Often Doesn’t Work
Many homeowners attempt to remove squirrels using traps or repellents. While these methods may temporarily reduce activity, they rarely solve the underlying problem.
DIY removal often fails because:
- Hidden entry points remain open.
- Nesting areas aren’t completely removed.
- Young squirrels may still be inside.
- Squirrels often return to familiar nesting locations.
Professional squirrel removal focuses on safely removing the animals while preventing them from re-entering your home.
Preventing Future Squirrel Damage
After squirrels have been removed, prevention becomes the most important step.
Helpful preventative measures include:
- Repair damaged roofing materials
- Seal all attic entry points
- Install chimney caps and vent covers
- Trim tree branches away from the roof
- Schedule periodic roof inspections
These steps greatly reduce the likelihood of another infestation.
Why Professional Squirrel Removal Matters
Removing squirrels is only part of the solution. Long-term protection depends on identifying how they entered your home and preventing future access.
Experienced wildlife professionals inspect the entire property, locate hidden entry points, remove squirrels safely, and recommend repairs that help keep wildlife from returning.
For homeowners experiencing recurring squirrel problems, a professional inspection can save significant repair costs over time.

Frequently Asked Questions
How do squirrels get into attics?
Squirrels typically enter through damaged roof vents, soffits, fascia boards, loose shingles, chimneys, or other small openings near the roofline.
Can squirrels damage my roof?
Yes. Squirrels can chew through roofing materials, wood, and vents to create or enlarge entry points into your attic.
Are squirrels dangerous inside a home?
While squirrels generally avoid people, they can damage insulation, wiring, wood structures, and leave droppings that contaminate attic spaces.
Will squirrels leave on their own?
Not usually. If squirrels have built a nest or are raising young, they are likely to remain until they are safely removed.
Should I try to remove squirrels myself?
DIY methods may offer temporary results but often fail to address entry points and nesting areas. Professional removal helps ensure the problem is fully resolved.
Protect Your Roof Before Small Problems Become Major Repairs
A squirrel infestation can cause far more damage than most homeowners expect. What begins as occasional scratching in the attic can quickly lead to damaged roofing, destroyed insulation, chewed electrical wiring, and costly structural repairs.
If you suspect squirrels have entered your home, Chicago’s Green Trappers provides professional squirrel removal Chicago services, humane wildlife removal, and long-term prevention solutions. Our experienced team will inspect your property, safely remove squirrels, identify entry points, and help protect your home from future infestations.