The Best Pest Control Is Prevention
The most effective—and most affordable—pest control strategy is keeping pests out in the first place. A reactive treatment for cockroaches, mice, or termites can cost $300–$3,000+. A consistent prevention routine costs a fraction of that and eliminates the stress of dealing with an active infestation. Here are 15 specific, actionable steps every homeowner should take.
Seal Entry Points
1. Seal Gaps Around Utility Penetrations
Pipes, conduit, cables, and HVAC lines entering your home often leave gaps around them that are large enough for mice, insects, and even small rats to enter. Fill these gaps with steel wool packed tightly into the void, then seal over it with caulk or expanding foam. Steel wool alone deters gnawing; the sealant holds it in place and prevents moisture intrusion.
2. Install Door Sweeps on All Exterior Doors
A gap as small as 1/4 inch under a door is sufficient for mice, cockroaches, and other pests to enter. Install door sweeps on all exterior doors, including the garage door. Check weatherstripping around the door frame and replace any sections that are cracked or compressed.
3. Seal Foundation Cracks
Inspect your foundation annually for cracks wider than 1/4 inch. Fill them with concrete patching compound or hydraulic cement. Pay particular attention to where the sill plate meets the foundation—this is a common entry point for carpenter ants, centipedes, and crickets.
4. Screen All Vents and Openings
Soffit vents, attic vents, crawl space vents, and dryer exhaust vents are common wildlife entry points. Cover them with heavy-gauge hardware cloth (1/4 inch mesh or finer) rather than plastic screening, which squirrels and rats can chew through easily.
5. Repair Roof Damage Promptly
Damaged or missing fascia boards, rotted soffits, and gaps where the roof deck meets the eaves are how squirrels, raccoons, and birds enter attics. Have a roofline inspection done annually—ideally in late summer before fall, when rodents begin seeking winter shelter.
Eliminate Food Sources
6. Store Food in Sealed Containers
Transfer pantry staples—cereals, grains, flour, nuts, dried fruit, pet food—to airtight containers. Cardboard boxes and plastic bags are easily breached by rodents and pantry moths. Glass or hard-sided plastic containers with tight-fitting lids are ideal.
7. Never Leave Pet Food Out Overnight
A bowl of dry pet food left out overnight is an open invitation to mice, cockroaches, and ants. Feed pets on a schedule and pick up uneaten food within 30 minutes. Store pet food in sealed containers, not open bags.
8. Take Trash Out Regularly and Use Lidded Bins
Use trash cans with tight-fitting lids, both inside and outside the home. Empty kitchen trash daily during warmer months. Keep outdoor garbage bins away from the house if possible, and clean them periodically to remove residue and odors that attract pests.
9. Clean Up Crumbs and Spills Immediately
Cockroaches and ants can survive on minimal food sources. Wipe down counters and stovetops daily, sweep kitchen floors regularly, and clean under appliances—the gap under the refrigerator and stove collects grease and debris that pests love.
Control Moisture
10. Fix Leaky Pipes and Faucets Promptly
Moisture is one of the top attractants for cockroaches, silverfish, centipedes, and carpenter ants. Fix dripping faucets and slow leaks under sinks immediately. Check supply lines to washing machines, dishwashers, and refrigerators annually.
11. Maintain Gutters and Downspouts
Clogged gutters overflow, saturating the soil against the foundation and creating ideal conditions for subterranean termites and moisture ants. Clean gutters at least twice a year and ensure downspouts direct water at least 6 feet from the foundation.
12. Ventilate Bathrooms and Crawl Spaces
Run bathroom exhaust fans during and after showers. If your crawl space is humid, consider a vapor barrier and dehumidifier—high moisture in crawl spaces is a primary driver of subterranean termite and wood-decaying fungi activity.
Yard Management
13. Keep Mulch and Wood Debris Away from the Foundation
Maintain at least a 12-inch gap between mulch or organic ground cover and your foundation. Mulch retains moisture and provides harborage for ants, termites, and rodents. Stack firewood at least 20 feet from the house on a raised rack, not directly on the ground.
14. Trim Vegetation Touching the House
Tree branches that overhang the roof are squirrel and raccoon highways into your attic. Trim branches to maintain at least a 10-foot clearance from the roofline. Shrubs and dense vegetation against the foundation provide harborage for spiders, ants, and rodents—keep a clear zone around the perimeter.
Seasonal Actions
15. Conduct a Spring and Fall Inspection
Each spring, walk your home’s perimeter looking for new cracks, damage to screens and vents, and signs of pest activity (mud tubes, droppings, gnaw marks, wood damage). Each fall, focus on sealing rodent entry points before temperatures drop and mice begin seeking indoor shelter.
When Prevention Is Not Enough
Even the most diligent homeowner can face a pest problem—pests are opportunistic and persistent. If you’re seeing signs of an active infestation despite your prevention efforts, it’s time to call a professional. Early treatment is always less expensive than waiting. Connect with a licensed exterminator near you for a free inspection and quote, or explore our pest guide library to identify what you’re dealing with before calling.