Do Asian Beetles Live in Walls?

 

At the very start: Asian lady beetles often hide inside wall voids during cooler months to stay warm, but they do not live there year-round or establish breeding colonies.

 

What Does “Overwintering” Mean?

 

Overwintering is a term that means spending the winter season in a sheltered spot. Asian beetles look for cracks and openings in building exteriors and slip into the wall void—the empty space between the siding and the drywall—where temperatures stay stable. Inside these voids, they gather in clusters and remain inactive until warmer weather returns.

 

How Do They Get Inside Walls?

 

Asian beetles are small and can crawl through tiny gaps. Common entry points include:

• Cracks around window and door frames
• Gaps in exterior siding or trim
• Spaces around utility cables or pipes
• Openings under eaves or soffits

 

Signs You Have Them in Your Walls

 

You might notice:

• A sudden increase in beetles on interior window sills or walls when temperatures drop
• Clusters of small orange-red insects behind curtains or near outlets
• A light musty odor from many beetles gathered together

 

Do They Cause Structural Damage?

 

No. Unlike termites or carpenter ants, Asian lady beetles do not chew wood, insulation or wiring. Their presence is more of a nuisance. They can stain walls, leave yellow spots of fluid when disturbed, and their scent may trigger allergic reactions in sensitive individuals.

 

Preventing and Managing Wall Infestations

 

To keep beetles out of wall voids and your living space:

• Seal cracks and gaps around doors, windows and siding with caulk or weather-stripping
• Install fine-mesh screens in vents and openings
• Repair or replace damaged siding and trim
• Vacuum beetles indoors with a hose attachment and empty the canister promptly
• Perform sealing work in early fall before the first frost drives beetles indoors

 

When to Seek Professional Help

 

If clusters of beetles persist after basic sealing steps, or if they emerge in large numbers and cause discomfort, consult a trained pest control technician. Professionals can inspect wall voids, apply approved insecticide dust or aerosol treatments, and recommend long-term sealing solutions. Many homeowners near Nashua rely on expert assistance when seasonal swarms are heavy.