Termites in Missouri: What St. Louis-Area Homeowners and Buyers Need to Know

Sean Struckmeyer
2 days ago
7 min read

Termites are the kind of problem you almost never see coming. They work quietly, inside the wood and out of sight, and by the time the damage shows on the surface, a colony may have been feeding on a home's framing for years. During inspections across the St. Louis region, we find the evidence regularly: mud tubes running up basement walls, tunnels along floor framing, and joists hollowed out from the inside.

There's a common belief around here that termites are a "down South" problem, something Mississippi and Alabama worry about, but not Missouri. That belief costs homeowners money. We don't have it as bad as the Deep South, but the St. Louis region sits squarely in termite country, and that includes homes in the city, in the suburbs, and out across the surrounding counties.

Here's what every Missouri homeowner and buyer should know: whether we really have termites here, how to spot the signs, how to keep them out, who is actually licensed to inspect for them, and why your VA loan may require an inspection.

Yes, the St. Louis region has termites, primarily the Eastern subterranean termite, which lives in the soil and tunnels into homes through mud tubes. Missouri sits in a "moderate to heavy" termite-risk zone, and termites are found throughout the area, including within the city and in both slab and basement homes. In Missouri, a formal termite (wood-destroying organism) inspection must be performed by an inspector licensed as a pesticide applicator through the Missouri Department of Agriculture, and VA loans in Missouri generally require one.

Do we really have termites in the St. Louis area?

Yes, and more than most people assume. The dominant species here is the Eastern subterranean termite (Reticulitermes flavipes), which is found across all of Missouri's 114 counties. The state falls into Termite Infestation Probability Zone 2, rated "moderate to heavy." That's not the wall-to-wall pressure of the Gulf Coast, but it's a long way from termite-free.

A few local realities worth knowing:

The city is not exempt. Urban heat retention in St. Louis can actually extend the termites' active feeding season by a few weeks compared with surrounding rural areas. Older housing stock with wood framing close to grade is a classic target.
A slab or a basement won't stop them. Subterranean termites exploit expansion joints, plumbing penetrations, and cracks as fine as 1/32 of an inch to reach the wood above.
Insurance usually won't help. Most standard homeowners policies treat termite damage as preventable maintenance and exclude it. (Check your own policy.) That makes early detection and prevention your real protection.

Because these termites work from the inside out, a home can look perfectly fine on the surface while quietly losing structural wood underneath. That's exactly why they're so often missed until an inspection or a renovation uncovers them.

What are the warning signs of termites?

The single most reliable sign of subterranean termites is the mud tube — a pencil-width tunnel of soil, saliva, and waste that termites build to travel from the ground to the wood they feed on, staying protected and moist along the way. Look for them on foundation walls, basement walls, crawlspace piers, and floor framing.

Other signs to watch for:

Swarmers and discarded wings. In spring — sometimes as early as late February during a St. Louis "false spring" — mature colonies release winged reproductives. Finding them, or small piles of shed wings near windows and doors, points to a colony nearby.
Damaged or hollow-sounding wood. Termite-eaten wood can look intact but sound hollow when tapped, or crumble to reveal soil-packed galleries. Window sills, trim, and floor joists are common casualties.
Blistered or sagging surfaces — paint or flooring that bubbles or dips where tunneling and moisture have weakened the wood beneath.
Photo: mud tubes along floor framing.

*Photo: a termite-damaged floor joist observed during an inspection.*

One useful distinction: a termite swarmer is easy to mistake for a flying ant. Termites have straight antennae, a thick waist, and two pairs of equal-length wings; ants have bent antennae, a pinched waist, and front wings longer than the back. And note, fine, sawdust-like droppings usually point to a different wood-destroyer (more on those next), because subterranean termites leave mud, not sawdust.

What about other wood-destroying organisms?

Termites get the headlines, but they aren't the only pests that damage structural wood. A thorough wood-destroying organism (WDO) inspection looks for all of them, including:

Powderpost beetles: they bore tiny round exit holes and leave a fine, flour-like sawdust (frass), often in hardwood flooring, trim, and framing.
Carpenter bees: they drill clean, round, roughly dime-sized holes into eaves, fascia, decks, and railings to nest, weakening exposed wood over time.
Carpenter ants: they don't eat wood, but they excavate smooth galleries in damp or decaying wood and push out sawdust-like debris.

These all cause real damage. In our area, though, termites remain the primary structural threat, which is why most inspections start there.

How do you prevent termites?

Prevention comes down to denying termites the three things they need: moisture, wood, and a path up from the soil. The steps that make a real difference:

Keep wood and mulch away from the foundation. Maintain clearance between soil or mulch and any wood siding or trim, and store firewood and lumber off the ground and away from the house.
Control moisture. Fix plumbing leaks, extend downspouts, and grade soil to drain away from the foundation, damp wood is a magnet.
Ventilate crawlspaces and basements to keep humidity down.
Remove dead wood from the yard. Stumps, roots, and buried scrap wood are colony fuel sitting right next to your home.
Seal foundation cracks and gaps around utility penetrations to cut off entry points.
Schedule routine inspections. Because termites hide, a periodic professional inspection is the most dependable way to catch them early — before the repair bill grows.

Who can perform a termite inspection in Missouri?

This catches a lot of buyers off guard: in Missouri, not just anyone can issue a termite inspection. A formal wood-destroying organism inspection — the report often called a "termite letter," typically produced on the industry-standard NPMA-33 form — must be performed by someone licensed as a pesticide applicator through the Missouri Department of Agriculture, in the structural/termite pest control category, under the Missouri Pesticide Use Act.

That license is separate from the home inspector license. A general home inspection and a WDO inspection are two different things under Missouri law. So when you're lining up inspections, it's worth confirming that whoever performs the termite inspection holds the proper state applicator license to issue the report your lender or contract requires.

Here's where we fit in: Tech Inspect is a home inspection company, not a licensed WDO inspector, and we think being clear about that line matters. During your home inspection, we document any visible signs of termites and the conditions that invite them. If we find something that warrants the formal report, we'll connect you with a properly licensed WDO inspector to produce the NPMA-33 your lender or contract requires, so you always know what your termite inspection needs and who should perform it.

Do VA loans require a termite inspection in Missouri?

Yes. Missouri is classified as a "moderate to heavy" termite-risk state on the VA's termite probability map, and a wood-destroying insect inspection is generally required on VA purchase loans statewide. A few specifics that matter:

The report is typically completed on the NPMA-33 form and is generally valid for about 90 days — so timing matters inside your closing window.
Since a June 2022 VA rule change (Circular 26-22-11), the veteran buyer is now allowed to pay for the inspection; previously it usually had to be the seller. The cost is still negotiable between buyer and seller.
If an active infestation or structural damage is found, treatment and any required repairs typically must be completed, often with a clearance letter, before the loan can close.

FHA and conventional loans don't automatically require a termite inspection, but an appraiser who sees evidence of infestation or damage can trigger one. Given the local termite pressure, plenty of buyers choose to get one regardless of loan type.

The bottom line

Termites are quiet, they're patient, and around St. Louis they're a genuine risk — not a Deep-South-only worry. The good news is that they're also very catchable. Knowing the signs, keeping moisture and wood-to-soil contact in check, and getting a qualified inspection on the right schedule is what stands between a minor finding and a major structural repair.

See how we document what we find

The clearest way to understand how we report on a home is to open a real report. We've published three full sample reports you can click through just like a client would with the photos, video, and plain-English findings in place.

When you're ready, see everything inside a Tech Inspect report or schedule your inspection same-week availability, weekend appointments, and a report delivered within 24 hours.

Frequently asked questions

Does the St. Louis area really have termites? Yes. The Eastern subterranean termite is found throughout Missouri, including the St. Louis area and the surrounding counties. Missouri sits in a "moderate to heavy" termite-risk zone, and termites affect both slab and basement homes including properties in the city.

What is the most common sign of termites? Mud tubes pencil-width tunnels of soil and saliva on foundation walls, basement walls, crawlspace piers, or floor framing. Other signs include spring swarmers, discarded wings, and wood that sounds hollow or crumbles.

Are termites covered by homeowners insurance? Usually not. Most standard policies treat termite damage as preventable maintenance and exclude it, which is why early detection and prevention matter so much. Check your specific policy.

Who can perform a termite inspection in Missouri? A formal termite (WDO) inspection must be performed by an inspector licensed as a pesticide applicator through the Missouri Department of Agriculture, in the structural/termite category. That license is separate from the home inspector license.

Does my VA loan require a termite inspection in Missouri? Generally, yes. Missouri is a statewide WDI-required state for VA purchase loans. The report uses the NPMA-33 form and is typically valid for about 90 days; since June 2022, the veteran buyer is allowed to pay for it.

When do termites swarm in Missouri? Most often in spring, and in St. Louis sometimes as early as late February during a warm "false spring." Seeing swarmers or shed wings is a sign a colony may be nearby.

Ready to protect your investment?

Same-week availability, weekend appointments, and a report delivered within 24 hours. See three full sample reports, explore everything inside the report, or schedule your inspection.

Tech Inspect Home Services LLC · 3580 Highway T, Marthasville, MO 63357 · 636-201-6366 · sean@techinspecthome.com