Spiders
Common in cabins, basements, and crawl spaces
About Spiders
Wisconsin is home to dozens of spider species, and Northwoods lake homes provide ideal habitat — dark basements, cluttered storage areas, crawl spaces, and the abundant insect populations that spiders feed on. While most Wisconsin spiders are harmless nuisances, large infestations are a sign that other pest activity is supporting them. The presence of spiders indoors typically means there's a food source — other insects — that needs to be addressed.
How to Identify Them
- Common species include wolf spiders (large, fast-moving, brown), cellar spiders (long thin legs, loose webs), and orb weavers (round webs outdoors)
- Wolf spiders are often mistaken for brown recluse — true brown recluse are rare in Wisconsin
- Egg sacs are round, papery, and often attached to webs or hidden in corners
- Webs in corners, along ceiling edges, in window frames, and in basement areas
- Most active at night; wolf spiders may be seen running across floors
Why They're a Problem
Most Wisconsin spiders pose no real danger to humans — their bites are rare and typically cause only minor irritation. However, large spider populations inside a home are a reliable indicator of a broader pest problem. Spiders don't move in without a food source. If you're seeing spiders regularly, it means other insects are present in numbers. Additionally, spider webs are unsightly, and wolf spiders can be alarming to encounter, especially in bedrooms and bathrooms.
Signs of a Spider Problem
- Frequent spider sightings inside the home, especially in living areas
- Webs in corners, along walls, in window frames, and in the basement
- Egg sacs attached to webs or tucked into crevices
- Wolf spiders running across floors, especially at night
- Spiders in bedrooms, bathrooms, or other occupied spaces
How K2 Treats Spiders
Effective spider control means addressing both the spiders and the insects they feed on. K2 applies residual treatments to baseboards, corners, window frames, and other harborage areas, and treats the exterior perimeter to reduce the insect populations that attract spiders indoors.
- 1Interior inspection to identify harborage areas, web locations, and species present
- 2Residual treatment to baseboards, corners, window frames, and crawl spaces
- 3Exterior perimeter treatment to reduce insect populations and block entry points
- 4Recommendations for reducing clutter and moisture that support spider habitat
- 5Follow-up as needed based on activity level
Prevention Tips
- Reduce clutter in basements, garages, and storage areas where spiders hide
- Seal gaps around windows, doors, and utility penetrations
- Keep exterior lighting to a minimum — lights attract insects, which attract spiders
- Remove webs promptly to discourage re-establishment
- Address moisture issues in basements and crawl spaces
- Regular perimeter treatments keep insect populations — and spiders — in check
Dealing with Spiders?
Don't wait — call K2 for a free estimate and fast service anywhere in the Northwoods.
(715) 891-2501Free estimates · Same-week service