My Exterminator Missed Mice Entry Points — What to Do Next
My Exterminator Missed Mice Entry Points — What to Do Next
You paid for an inspection and treatment. Weeks or months later, the mice came back — or your contractor found gaps that were never sealed. This is one of the most common situations Rodent Shield Truckee is called for. Here’s exactly what happened and what to do now.
Why This Happens
Why General Pest Companies Miss Entry Points in Truckee Mountain Homes
A general pest exterminator’s standard inspection protocol involves walking the exterior perimeter at ground level, looking for visible gaps, and checking obvious access points near the foundation. This protocol is adequate for urban and suburban homes built to standard residential specifications at lower elevations. It is not adequate for Truckee.
Truckee mountain homes — particularly A-frames, pier-foundation lakeside cabins, and ski resort townhomes — have entry point profiles that don’t appear in standard pest control training:
- Roofline fascia gaps from snow load. Annual snowpack of 300–450 inches physically lifts fascia boards away from eave edges. The resulting gap — invisible from ground level — is large enough for deer mice and roof rats. A ground-level inspection misses it entirely.
- Soffit vent screen displacement. Freeze-thaw cycling corrodes and shifts soffit screens over successive winters. By January, screens that were intact in September are displaced or corroded through. Not visible without a ladder or attic access.
- Foundation seam openings. Ground freeze-thaw at Truckee elevations opens foundation expansion joints and pier footing seams every winter. These are below grade or behind vegetation and require crawl space access to find.
- Chimney cap failure. Freeze-thaw cycling corrodes chimney caps and shifts flashing. Roof rats and deer mice enter through open or improperly fitted caps. Requires roofline access to inspect.
- Garage-to-house shared wall penetrations. Utility lines, plumbing runs, and HVAC connections passing through the shared wall between garage and living area create gaps that are almost never sealed during original construction. This is the primary indoor colonisation route that most inspectors never check.
The Zachary Shields problem: One of the most common calls we receive goes like this: “A pest company inspected my cabin and did treatment. A few weeks later, my contractor was doing renovation work and found three gaps in the attic and one at the foundation that were never mentioned in the inspection report.” This is not the contractor’s fault. It’s not even necessarily negligence — it’s a scope mismatch. General pest control inspections are not structural engineering assessments. Ours are.
How to Know if Your Previous Inspection Missed Entry Points
🔴 Signs entry points were missed
Mice returned within one to two months of treatment. Problem recurred the following October. A contractor or builder found structural gaps not in the inspection report. Scratching heard in ceiling or attic despite completed treatment. Company never accessed the attic, crawl space, or roofline during inspection.
✅ Signs a thorough inspection was completed
Photo report showing specific entry points found with GPS tags. Mention of roofline, attic, and crawl space in the report. Stainless hardware cloth used — not foam or standard mesh. Follow-up visit to confirm trap clearance. Problem stayed fixed through the following winter.
Can I just seal the entry points myself now that I know where they are?
You can attempt it, but two specific issues make DIY exclusion sealing in Truckee likely to fail. First, material selection: standard foam and wire mesh — the two materials most commonly available and most commonly used by general contractors for rodent exclusion — both fail in Truckee’s freeze-thaw climate. Foam cracks at sub-zero temperatures within one season. Norway rats chew through standard wire mesh within weeks. The correct material is ¼-inch stainless hardware cloth, cold-rated metal flashing for larger structural gaps, and frost-rated vent guards for foundation and soffit vents. Second, finding all the gaps: once you know about the gaps your contractor found, you still don’t know about the ones your contractor didn’t find. The structural assessment required to be confident all entry points are sealed in a Truckee mountain home requires attic access, crawl space access, and roofline assessment — not just the gaps visible from inside during renovation.
What the Re-Inspection Looks Like
When Rodent Shield Truckee re-inspects a property that was previously treated by another company, we do not simply confirm what they found. We conduct our full structural assessment independently — roofline, attic, crawl space, foundation perimeter, garage shared wall, and interior plumbing penetrations.
Every entry point found is photographed with a GPS tag and rated A (seal immediately), B (seal this season), or C (monitor). You receive the complete photo report by email the same day. If you have a report from the previous company, we can compare directly — showing you what was in their report, what they missed, and why.
There is no charge for identifying what a previous company missed. The inspection fee is credited toward any approved sealing work.
Do I have to pay for another full inspection if I’ve already paid a previous company?
Yes — a new inspection is required because the previous report is not a reliable baseline. We don’t know what scope the previous company used, what access they took, or what their inspection methodology covered. Our inspection fee is flat and credited toward any approved sealing work. If we find that a previous company did seal all entry points correctly and your problem has a different cause (scent trails not eliminated, new winter-created gaps), we’ll tell you that directly and advise accordingly — you only pay for the work that’s actually needed.
Previous Company Didn’t Fix It? We Will.
Full structural re-inspection including roofline, attic, crawl space, and foundation. GPS-tagged photo report. Stainless hardware cloth exclusion. 90-day return protection. No contracts.
Missed Entry Points — Truckee Rodent Control FAQ