The Annual Termite Inspection Checklist
A single mature termite colony can include hundreds of thousands of workers, and most of them are eating wood you can't see.
Termite damage is rarely caught by accident. Homeowners who avoid 5-figure repair bills run a yearly self-check and book 1 professional WDI inspection in the right season for their region.
This checklist breaks the year into a season-by-season routine, plus the homeowner self-checks that keep you ahead of activity between professional visits.
Termites work quietly. By the time a swarm comes out of a baseboard or a tap on a stud sounds hollow, the colony has usually been feeding on the structure for months or years. The fix is simple in concept and almost always skipped in practice: 1 annual professional Wood Destroying Insect (WDI) inspection, plus 4 short homeowner walks timed to the season when activity is most visible in your climate.
Below are the 4 seasonal windows, the self-check tasks that belong in each, and the moments when a professional WDI inspection is required, including most mortgage refinances and nearly every home sale. Use it as a standalone routine for your own peace of mind, or as the homeowner-side companion to a yearly professional inspection.
Key Takeaways
- 1 professional WDI inspection per year is the baseline standard for any home in a termite-pressure region, and most providers recommend annual cadence.
- Spring is the highest-signal season. Eastern subterranean swarmers (Reticulitermes flavipes) emerge after the first warm rain, leaving wings on windowsills.
- Summer is when mud tubes are most active along foundations and crawl-space piers because soil moisture stays consistent.
- Fall is the key window for drywood termites in southern and coastal states, where swarms continue well past the subterranean season.
- Winter activity is lower, but warranty re-inspections and WDI reports for refinance or sale can be scheduled and completed any month of the year.
Why an Annual Cadence Matters
Termite damage is cumulative and silent. A subterranean colony can quietly extend foraging tubes through a sill plate, into a stud bay, and along a floor joist for 2 or 3 full seasons before a homeowner notices anything. That timeline is what makes annual inspection valuable. The point isn't to find a major infestation. By then the repair bill is already large. The point is to find the first mud tube, the first set of dropped wings, or the first pinhole in a sill plate while the problem is still measured in board feet, not rooms.
An annual professional WDI inspection costs a small fraction of even a minor termite repair, and the homeowner self-checks between visits cost nothing but 30 minutes a season. Together, those 2 cadences make termite damage one of the most preventable major homeowner expenses, but only if you actually run the routine. The seasonal grid below tells you which tasks belong in which window, and which signs to watch for in your region.
Book your annual termite inspection with a local pro.
A qualified inspector registered with the state board can run the full annual inspection, write a WDI report for refinance or sale, and walk you through any conducive conditions worth correcting before next swarm season.
Self-Checks vs the Annual WDI Inspection
Homeowner self-checks and professional WDI inspections do different jobs. A self-check is high-frequency and low-depth: 4 short 30-minute walks a year that catch obvious surface signs. Dropped wings, mud tubes against a foundation, a hollow-sounding sill plate, frass on a windowsill. You don't need any tools beyond a flashlight and a long-handled screwdriver, and you don't need to be an expert to spot the things that matter most.
An annual WDI inspection is low-frequency and high-depth. A trained inspector spends an hour or more probing wood members, examining the crawl space and attic with the right lighting and equipment, mapping conducive conditions, and producing the formal Wood Destroying Insect Report. That report is the document mortgage lenders, refinance underwriters, and home-sale buyers actually require. It's written in a standardized format (NPMA-33 in most U.S. markets) that other parties recognize and accept.
2 Annual Inspection Mistakes
Letting the Termite Bond Lapse
If you or a previous owner put the home under a termite bond or warranty, those agreements almost always require a paid annual re-inspection to stay active. Skip 1 year and the warranty voids, which means the next claim, even on damage that started while the bond was in force, is on you. If you have an active bond, the annual visit is non-negotiable.
Ordering the WDI Report Too Early
Wood Destroying Insect Reports are typically valid for 30 to 90 days depending on the lender. Homeowners refinancing or selling sometimes order the report months ahead and then have to pay for a re-inspection at closing. Wait until the closing or refinance timeline is firm, then schedule the WDI inspection within the validity window.
Termite Pressure by the Numbers
USDA and industry estimates put total annual termite damage and treatment spending in the U.S. at roughly $5 billion. The vast majority of that cost falls on homeowners, and the typical claim isn't covered by standard homeowner insurance policies.
USDA Forest Service mapping shows subterranean termites are present in every U.S. state except Alaska, with the heaviest pressure across the South and along the Pacific and Atlantic coasts. Annual cadence is the recommended baseline in any state with documented activity.
The National Pest Management Association recommends a professional termite inspection at least once per year for homes in any termite-pressure region. Many termite bonds and treatment warranties also require annual re-inspection to stay valid.
Sources: USDA, Subterranean Termites (Forest Service) EPA, Termites: How to Identify and Control Them NPMA, Termite Inspection Guidance
Annual Termite Inspection Checklist
Each of the 4 cards lists the homeowner self-check tasks for that season and the signs that matter most in that window. Pick 1 season for your professional WDI inspection (spring is the default in most regions) and run the self-checks in the other 3.
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Spring March to MayPost-swarm season. Eastern subterranean (Reticulitermes flavipes) signs are most visible right now.
- Walk every windowsill, doorframe, and light fixture for discarded wings after the first warm rain
- Tap baseboards, sill plates, and door jambs with a screwdriver handle and listen for hollow sounds
- Inspect basement walls and crawl-space piers for 1/4 inch mud tubes running upward from soil
- Check porches, decks, and any wood-to-soil contact points for soft spots, blistering paint, or frass
- Schedule the year's professional WDI inspection now if you live in a subterranean-termite region
Pro tip: Subterranean swarmers fly within hours of a warm spring rain. Plan your spring walk for the day after the first 70 degree storm.
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Summer June to AugustPeak mud-tube season. Soil moisture supports active subterranean foraging, and Formosan termites (Coptotermes formosanus) are at full strength in Gulf states.
- Re-inspect the foundation perimeter for new mud tubes, especially after heavy rain
- Check expansion joints, slab cracks, and bath traps for tubes rising from below
- Look for moisture problems near the foundation: leaking spigots, downspouts, AC condensate lines
- Inspect attached structures: porch posts, deck ledger boards, fence-post connections to the home
- Pull mulch back at least 6 inches from siding and confirm there's no wood-to-soil contact
Pro tip: A live mud tube is moist and dark inside when you break a small section open. If it's dry and brittle, the colony has moved, but the entry point still needs to be sealed.
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Fall September to NovemberDrywood swarm season in southern and coastal states.
- Inspect attic rafters, fascia boards, and exposed framing for drywood termite kick-out holes
- Look for piles of small, 6-sided fecal pellets (frass) below window frames and door trim
- Check eaves, soffits, and any unpainted exterior wood for tiny pin-sized exit holes
- Re-walk the perimeter once leaves drop to spot mud tubes that summer foliage was hiding
- Confirm crawl-space ventilation is clear so winter humidity won't drive termites further into the structure
Pro tip: Drywood termites don't need soil contact, so attic and roofline checks matter most here. Keep a pillbox or zip bag handy to collect frass samples for your inspector.
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Winter December to FebruaryLower outdoor activity, but warranty and transaction inspections still happen.
- Schedule warranty re-inspections under any active termite bond or treatment guarantee
- Order a WDI report now if you're refinancing or listing the home for sale in spring
- Inspect heated areas first: basements, mechanical rooms, fireplace surrounds, where activity continues year-round
- Review last year's inspection report and confirm any flagged conditions were corrected
- Plan moisture fixes: failing gutters, slow leaks, poor grading, so they're done before the spring swarm
Pro tip: Lenders and buyers don't pause termite reports for the season. A WDI inspector can document conditions and write a current report any winter month.
What a WDI Inspector Actually Checks
A formal inspection covers more than visible termite activity. The inspector documents conducive conditions, prior treatment evidence, and any wood-destroying organism, not just subterranean termites.
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Active Infestation Evidence
Live termites, fresh 1/4 inch mud tubes, recent swarmer wings, kick-out holes with active frass, and tap-test results on accessible wood members. Anything currently feeding gets flagged and described in the report.
The Bottom Line
Annual termite inspection is the highest-leverage routine in home maintenance. 1 professional WDI visit per year, plus 4 short seasonal self-checks, prevents most of the catastrophic termite repairs homeowners are paying for elsewhere. The time investment is small. The payoff is not having to rebuild a sill plate, a floor system, or a load-bearing wall after the colony has been feeding for 3 years.
Pick a season (spring is the default in most regions) and lock in your professional inspection on that anniversary every year. Add the seasonal self-checks for the other 3 windows. If a refinance, sale, or VA loan enters the picture, schedule the WDI report close to the closing date. That's the entire system, and it's the difference between catching termites at the first mud tube and meeting them after the floor sags.
Annual Termite Inspection FAQs
Common questions about annual termite inspections, WDI reports, and seasonal timing.
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How often should I have my home inspected for termites? Toggle answer for: How often should I have my home inspected for termites?
Once a year is the baseline standard for any home in a termite-pressure region, and most pest providers and the National Pest Management Association recommend annual cadence. Many termite bonds and treatment warranties also require annual re-inspection to stay valid.
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What time of year is best for a termite inspection? Toggle answer for: What time of year is best for a termite inspection?
Spring is the default in most regions because subterranean swarmers emerge after the first warm rain, leaving wings on windowsills as visible evidence. That makes activity easier for an inspector to confirm.
In southern and coastal states with drywood pressure, fall is also a strong window. Pick one anniversary and lock in your professional inspection on that date every year.
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What is a WDI report and when do I need one? Toggle answer for: What is a WDI report and when do I need one?
A Wood Destroying Insect Report is a standardized form (NPMA-33 in most U.S. markets) produced by a qualified inspector. It documents active infestation, past damage, prior treatment, and conducive conditions.
Most mortgage refinances, nearly every home sale, and many VA and FHA loan files require a current WDI report. Reports are typically valid for 30 to 90 days, so order yours close to the closing date.
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Can I just inspect for termites myself? Toggle answer for: Can I just inspect for termites myself?
Self-checks catch obvious surface signs (dropped wings, mud tubes, frass, hollow-sounding sill plates) but they do not replace the professional visit. A trained inspector probes wood members, examines the crawl space and attic with proper equipment, and produces a formal report that lenders and buyers actually accept.
The right routine is one professional WDI inspection per year, plus four 30-minute homeowner walks timed to each season.
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What happens if I let my termite bond lapse? Toggle answer for: What happens if I let my termite bond lapse?
Termite bonds and warranties almost always require a paid annual re-inspection to stay active. Skip one year and the bond voids, which means the next claim, even on damage that started while the bond was in force, becomes your responsibility.
If you have an active bond, the annual visit is non-negotiable. The cost of the re-inspection is small compared to losing warranty protection on an existing treatment.
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How do I tell flying ants from termite swarmers? Toggle answer for: How do I tell flying ants from termite swarmers?
Three field marks decide it. Termite swarmers have straight antennae, two pairs of equal-length wings, and a thick uniform waist. Winged ants have bent antennae, front wings longer than back, and a clearly pinched waist.
If you find a pile of identical clear wings on a windowsill in spring, capture one in clear tape and send a photo to a qualified inspector. That single image usually resolves the ID within a day.
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Should I order my WDI report months before closing? Toggle answer for: Should I order my WDI report months before closing?
No. WDI reports are typically valid for 30 to 90 days depending on the lender. Homeowners who order months ahead often have to pay for a re-inspection at closing.
Wait until your closing or refinance timeline is firm, then schedule the WDI inspection within the validity window your lender accepts.
Termite Inspection Pros serving your city, and nearby areas
Talk to a local provider who knows the swarm windows and termite pressure in your climate, so your annual inspection is timed to actually catch activity.