Plenty of homeowners sign up for the same routine every spring: a technician sprays the baseboards and foundation once a month, and the bill keeps arriving right along with the bugs. Spraying works, but it isn't the only way to keep bugs out of the house. A surprising amount of what lets ants, spiders, stink bugs, and boxelder bugs wander indoors comes down to gaps a house never should have had in the first place. Seal those gaps once, and you cut the problem off at the source instead of just knocking back whatever already got inside. Below, we'll walk through what that exclusion work actually involves, how it stacks up against a recurring spray plan, and when spraying still deserves a spot in the mix. A good pest exclusion service tends to start with exactly this kind of inspection.
What Exclusion Actually Involves
Exclusion just means closing the gaps insects use to get inside, rather than treating them once they're already in. In practice, that's a punch list, not a mystery. Caulk hairline cracks in the foundation and siding. Add weatherstripping around doors and windows so there's no gap along the edge. Patch or replace torn window screens, since a quarter-inch tear is plenty of room for a spider or a stink bug. Fit drain covers over floor drains and cover any pipe openings under sinks. None of it is glamorous, but together, these small fixes close off nearly every route a general household insect actually uses.
The Spots Bugs Actually Use To Get In
Before you can seal anything, it helps to know where to look. A thorough home pest-proofing walkthrough usually covers the same handful of trouble spots on nearly every house:
- Door thresholds and sweeps — worn rubber or a warped door lets crawling insects walk right under.
- Window screens and frames — small tears or gaps at the frame let flying insects slip through on a warm evening.
- Foundation cracks — even hairline gaps give ants and spiders a straight shot indoors.
- Utility line penetrations — where cable, gas, or plumbing lines pass through a wall, the gap around them is rarely sealed well from the factory.
- Dryer vents and crawl space openings — both are easy to overlook, and both stay open year-round unless someone checks.
Walk the outside of your house once with this list in hand, and you'll likely find more of these than you expect. Sealing them is what actually helps you keep bugs out of the house long after a spray treatment would have already worn off.
Sealing Once vs. Spraying Every Month
So how does the math actually compare? A monthly spray plan is convenient, but it's an ongoing cost that never really ends. Exclusion work costs more upfront in time or in a service call, and then it mostly just sits there, working. Here's how the common options line up side by side.
| Approach | Upfront Effort | Ongoing Cost | How Long It Lasts | Best For |
|---|---|---|---|---|
| DIY exclusion / sealing | Moderate — a weekend of caulking, weatherstripping, and screen repair | Low — materials only, no recurring bill | 1-3+ years, depending on materials and upkeep | Handy homeowners tackling a manageable, visible gap list |
| Monthly spray service | Low — just schedule the visit | Ongoing — a bill every month, indefinitely | Weeks — protection fades between visits | Active infestations or heavy seasonal pest pressure |
| Quarterly pest control plan | Low — four visits a year | Moderate — fewer bills than monthly service | Roughly 90 days per treatment cycle | Ongoing general prevention with less hassle than monthly visits |
| One-time professional exclusion service | Low for you — a licensed technician handles the sealing | One-time cost, no recurring bill | Multiple years, with occasional spot checks | Homeowners who want a lasting fix instead of a recurring one |
When Spraying Still Earns Its Keep
None of this means spray treatments are pointless. If you're mid-infestation, exclusion alone won't clear out what's already inside — you need something that acts now, not just something that blocks the door behind it. Heavy seasonal pushes, like the fall boxelder bug swarm or a bad ant year, can also overwhelm even a well-sealed house, since a few bugs will always find the one gap you missed. EcoFusion technicians often point out that the strongest results usually come from pairing the two: seal what you can, then lean on a lighter, ongoing treatment for whatever pressure builds up anyway. That's part of why a quarterly pest control plan pairs so well with exclusion work — it covers the gaps that sealing alone can't, without the cost of a monthly visit.
If you'd rather not chase down every gap yourself, that's a completely reasonable call. A preventative pest control visit from a licensed technician typically identifies the entry points you'd miss and handles the sealing in a single trip, so you're not stuck paying for a monthly spray plan indefinitely. Either way, the goal is the same: fewer bugs, less hassle, and a smaller bill over time. Give us a call, and we'll take a look at what's actually letting pests into your home.