When winter settles in across New England, most homeowners expect pest problems to slow down. Fewer insects outside usually feels like a win—but indoors, that’s not always the case. While rodents often steal the spotlight this time of year, moisture-loving pests like silverfish and earwigs can become surprisingly active inside homes during winter months.
The reason? Humidity pockets. Even when outdoor air is cold and dry, many homes create the perfect indoor microclimates for moisture pests to survive—and thrive.
Why Winter Drives Moisture Pests Indoors
Silverfish and earwigs depend on moisture to survive. In winter, frozen ground, snow cover, and cold temperatures eliminate many outdoor hiding places. These pests instinctively seek warmer environments with stable humidity—and your home offers exactly that.
Heating systems, everyday activities like cooking and showering, and reduced ventilation all contribute to higher indoor humidity during winter. When moisture becomes trapped in certain areas of the home, it creates ideal conditions for pests that prefer damp, dark spaces.
The Biggest Winter Humidity Hotspots in Your Home
Even well-maintained homes can develop hidden moisture pockets. Common trouble spots include:
- Bathrooms and laundry rooms
Hot showers, running dryers, and limited airflow can quickly raise humidity levels. Without proper ventilation, these rooms become prime real estate for silverfish. - Basements and crawl spaces
Cold concrete, foundation walls, and soil contact make these areas naturally damp—especially after snowmelt or winter rains. Earwigs are frequently found here, hiding in cracks and crevices. - Kitchens and utility areas
Dishwashers, sinks, refrigerators, and water heaters all introduce moisture. Small leaks or condensation often go unnoticed until pests appear. - Attics with poor ventilation
Warm air rises and condenses when it meets cold surfaces. Inadequate airflow can trap moisture in insulation and framing, attracting pests that move downward into living spaces. - Wall voids and storage areas
Closets, cardboard boxes, and paper goods absorb moisture over time, creating food and shelter for silverfish.
Why Silverfish and Earwigs Are a Problem
While neither pest is dangerous, they can still cause damage and frustration.
Silverfish feed on paper, book bindings, wallpaper paste, fabrics, and pantry items. Over time, infestations can ruin stored belongings and contaminate food. Earwigs are primarily nuisance pests indoors, but their presence often signals excess moisture. Outdoors, they can damage plants once spring arrives, making winter activity an early warning sign.
Seeing these pests in winter is rarely random—it’s a signal that conditions inside your home are working in their favor.
Winter Prevention Tips to Reduce Moisture Pests
The good news? Moisture pests are preventable with the right approach. Focus on moisture control first, then exclusion.
- Lower indoor humidity
Aim to keep humidity levels between 30–50%. Use dehumidifiers in basements and damp areas, especially during winter thaws. - Improve ventilation
Run bathroom and kitchen exhaust fans during and after use. Make sure vents lead outside—not into attics or crawl spaces. - Seal entry points
Caulk cracks around baseboards, windows, and foundation walls. Weather-strip doors and seal gaps around utility lines. - Address leaks promptly
Even minor drips under sinks or around appliances can sustain pests all winter long. - Reduce clutter
Store papers, books, and fabrics in sealed plastic containers rather than cardboard boxes. This removes both food sources and hiding places. - Maintain exterior drainage
Ensure gutters are clear and downspouts direct water away from your foundation—even in winter.
When DIY Isn’t Enough
If silverfish or earwigs continue to appear despite your efforts, it’s often because moisture is hiding where you can’t see it. Professional inspections can identify hidden humidity issues, nesting zones, and entry points that homeowners often miss.
At Cornerstone, we focus on root-cause pest control, not just surface treatments—especially for moisture-driven infestations that tend to return without proper prevention.
Seeing silverfish or earwigs indoors this winter? Don’t ignore the warning signs.
Cornerstone Pest Control can help identify moisture hotspots, seal entry points, and create a customized plan to keep your home pest-free all year long. Contact us today at (603) 395-9200 to schedule your winter inspection and protect your home before spring pest activity ramps up. For additional pest control topics, visit our blog!