Why Do Mice Chew on Things Around the House?
Mice have front teeth that grow continuously throughout their lives. Gnawing is a normal part of their behavior, and they chew on many different materials, including things they don't eat.
They also gather soft materials to make nests. Paper, cardboard, fabric, and insulation are all useful to a mouse looking for a sheltered place to raise its young.
Unfortunately, those same materials are found throughout your home.
The combination of gnawing, nesting, and contamination is what makes mouse damage a concern, particularly when the activity goes unnoticed for weeks or months.
What Kind of Damage Can Mice Do Inside Your Home?
Some mouse damage is easy to recognize, such as a chewed food package or a hole in a cardboard box. Other problems can be much more expensive, especially when they involve electrical systems or materials hidden inside walls and attics.
Electrical Wiring and Appliance Cords
One of the most serious concerns with mice inside a home is their ability to damage electrical wiring.
Mice can gnaw through the protective coating surrounding electrical wires, exposing the conductors underneath. This can create electrical problems, damage appliances, and increase the risk of a fire.
Wiring damage can occur in several places, including:
- Inside walls and ceilings
- In attics and crawl spaces
- Behind refrigerators, stoves, and other appliances
- Around electrical equipment in garages
- Anywhere mice can access exposed cords or wiring
The difficulty is that damage isn't always visible. Mice can chew on wiring behind walls or appliances long before a homeowner realizes something is wrong.
If you suspect electrical wiring has been damaged by mice, have a qualified electrician inspect it.
Insulation in Attics and Walls
Insulation provides mice with something they need: soft material for building nests.
Mice can pull apart fiberglass insulation, shred paper-backed materials, and create nesting spaces inside walls, attics, and other protected areas.
Over time, their activity can damage, displace, or contaminate insulation with urine and droppings.
This creates two potential problems for homeowners.
First, damaged insulation may become less effective at helping regulate indoor temperatures, particularly if mice have displaced significant amounts of material.
Second, contaminated insulation may need to be removed and replaced. Depending on the location and extent of the damage, the repair can be expensive.
Pantry Staples and Pet Food
Mice don't have to eat much to ruin a surprising amount of food.
They can chew through cardboard boxes, paper bags, and some plastic packaging to reach food stored in kitchens, pantries, and garages.
Common targets include cereal, rice, crackers, baking ingredients, pet food, and birdseed.
However, the damage doesn't stop with the food they eat.
Mice can contaminate food and nearby surfaces with their droppings, urine, and hair. Even when a package appears mostly intact, evidence of rodent contamination means the food should be discarded.
A mouse that gets into a pantry can leave homeowners throwing away groceries and cleaning cabinets, shelves, and other affected areas.
Cardboard Boxes and Stored Belongings
Garages, attics, and storage closets are especially vulnerable because they often contain items that aren't checked regularly.
Mice can chew through cardboard boxes to reach the contents or create nesting spaces. They also shred soft materials to make their nests.
Items that can be damaged include:
- Holiday decorations and seasonal storage items
- Clothing, blankets, and linens
- Books, photographs, and important documents
- Upholstered furniture and cushions
- Stored fabrics and other household materials
Some items can be cleaned or repaired. Others, particularly family photographs and important papers, may be impossible to replace.
For homeowners storing belongings in a garage or attic, mouse activity can continue for quite some time before anyone discovers the damage.
Drywall, Baseboards, and Other Household Materials
Mice can also damage the materials that make up your home's interior.
They may gnaw on drywall, wood trim, cabinet materials, and other accessible surfaces. Existing gaps around pipes, cabinets, or other openings can also be enlarged by their chewing.
This doesn't mean mice are destroying the structure of your home in the same way termites damage wood.
However, damaged drywall, trim, and other materials can still require repairs, especially when the affected areas are difficult to reach.
Even relatively small areas of damage can become inconvenient and costly when walls or other finished surfaces must be opened to access the problem.
Are Mice in Walls Dangerous?
Yes, mice living inside walls can create problems even when you never see them.
Wall spaces provide sheltered areas where mice can move, nest, and access insulation or electrical wiring. Because these areas are hidden, damage can continue unnoticed.
There is also the issue of contamination. Mouse urine and droppings can accumulate in wall spaces and affect the materials there.
That doesn't mean every mouse inside a wall has already caused serious damage. However, it does mean there's a potential problem that should be investigated.
The longer mice remain active in hidden areas, the more opportunities they have to damage materials or contaminate the spaces they're using.
If you're unsure whether rodents are active inside your home, our article on signs of a rodent infestation explains what to watch for.
Can Mice Destroy a House?
Mice aren't likely to destroy a house in the way termites can compromise wooden structural components. However, that doesn't mean the damage they cause is insignificant.
The biggest concern is usually the accumulation of smaller problems or damage to something particularly expensive to repair.
For example, replacing a few contaminated food packages is relatively straightforward. Repairing electrical wiring behind a wall or replacing damaged attic insulation is another matter.
How much damage mice cause depends on where they're active, how many are present, and how long the problem continues.
You don't necessarily need a large mouse infestation to experience an expensive repair. A small number of mice chewing in the wrong location can create a serious problem.
Other rodents can cause similar damage, too. If you're dealing with larger rodents, our article on Norway rat control in North Texas provides additional information.
Get Help With Mice Before They Cause More Damage
If mice have made their way into your home, addressing the activity can help prevent additional damage to your belongings and household materials.
The Pied Piper provides professional mouse control throughout Oklahoma and North Texas. Our Eufaula branch serves communities such as Muskogee and Wilburton, while our Azle office serves Weatherford, Aledo, and surrounding communities.
Our Piper Pro residential pest control plan includes coverage for mice inside the home, as well as exterior rodent bait stations to help manage rodent activity around your property.
Piper Pro also provides ongoing protection against common household pests and includes seasonal mosquito treatments. Piper Pro starts at $66 per month, plus an initial service fee.
Whether you've discovered damaged belongings in the garage, suspect mice are active inside your walls, or have seen one running through the kitchen, our team can help you determine the appropriate next steps.
Don't give mice more time to damage your home. Request a free quote or call (888) 605-1141 to learn more about professional pest control from The Pied Piper.
Originally published November 17, 2017. Updated October 17, 2026, to reflect current information about mouse damage and The Pied Piper's residential pest control services.
