The short version
Most termite problems in Longmont are arid-land subterranean termites, and the usual fix is a liquid soil treatment or bait stations. Start with an inspection; $75–$250 is typical.
- Look for mud tubes, shed wings and hollow-sounding wood.
- Swarms usually show up in spring and early summer.
- The usual fix is a soil barrier or bait stations.
- An inspection typically costs $75–$250.
- Insurance usually doesn’t cover termite damage.
Homeowners, landlords and anyone buying or selling a house in Longmont, whether you've spotted something or just want to know what to watch for.
What to look for
Spongy floors or bubbling paint usually mean long-running damage. So it's worth an inspection, even for one or two signs. Termites work quietly. A colony can feed inside a wall for years. Winter lows around Longmont average near 16°F, so termites retreat deeper into the soil, though colonies under heated basements can stay active all winter.
- 1Blistered or bubbling paint on wood surfaces.
- 2Buckling laminate or warped hardwood flooring.
- 3Termite activity reported at a neighbor's home.
- 4Live pale insects inside a broken mud tube.
- 5Discarded wings caught in spider webs.
- 6Damage found during a remodel or repair.
Why it’s worth acting soon
- Colonies grow and spread every year they go untreated.
- Damage hides behind drywall, flooring and trim.
- Homeowners insurance usually doesn’t cover termite damage.
- An active infestation can complicate a home sale.
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Termite activity through the year in Longmont
Spring
swarm season in Longmont, often on a warm day after rain. Check windowsills for wings.
Summer
with highs around 88°F in Longmont, termites follow moisture, so watch AC drain lines, sprinkler zones and hose bibs.
Fall
with about 14 inches of rain a year in Longmont, make sure gutters and downspouts carry water well away from the foundation.
Winter
a good time to book an inspection in Longmont, before swarm season starts.
Treatment options and typical costs
Termite Inspection and WDI Report
$75–$250
The inspector checks the foundation, garage, attic and damp spots. Bring up anything you’ve noticed.
- Time
- 60–120 minutes
- Best for
- Every job, real estate closings, and yearly peace of mind
Annual Renewal and Monitoring
$150–$400 per year
Some Longmont homeowners drop the renewal after a quiet year or two. That usually voids the warranty and leaves the barrier untested.
- Time
- 30–60 minutes per visit
- Best for
- Keeping a treated home protected after the initial job
Localized Wood, Foam, and Borate Treatment
$250–$1,500
When termites are limited to one wall or window frame, a technician can treat that wood directly, which is common when Longmont subterranean termites reach a damp sill plate. Foam expands into voids, and borate soaks into bare lumber.
- Time
- 1–3 hours
- Best for
- Small drywood spots, wall voids, and exposed framing
Bait Station System with Monitoring
$1,500–$3,500 install, plus $300–$500 per year
Each station holds cellulose bait laced with a chitin synthesis inhibitor. Workers around a Longmont home share it, cannot molt, and the colony dies over weeks to months.
- Time
- 2–4 hours to install; checked quarterly
- Best for
- Colony elimination, wells and slabs, homes near water
Prices are typical published ranges. Ask what’s included before you compare quotes.
Check under the kitchen sink for dampness and soft cabinet wood. Plumbing walls are a common path for termites coming up from a slab.How treatment works on a typical Longmont home.
Termites carry the bait back to the colony. The stations are checked on a schedule, often every few months. With a basement, the crew treats soil along the outside. Inside, they may drill where the floor meets the walls. Bait stations are the other main option. They're spaced every 10 to 20 feet.
Which termites live around Longmont.
It needs steady moisture. The termite you're most likely to meet in Longmont is the arid-land subterranean termite. It nests in soil and builds mud tubes to reach wood.
A downspout that dumps water at the foundation keeps the soil wet year-round. Extend it well away from the house.When termites swarm here.
Save a few in a bag, or snap a clear photo. Swarm season is when termites show themselves. Across Longmont, arid-land subterranean termites usually swarm in spring and early summer, often on a warm day after rain. A swarm outside means a colony is nearby. A swarm inside usually means it's in the house.
Where to look around your house.
The same advice applies across the area, from Longmont out to Boulder and Loveland. Plenty of homes in Longmont have basements, so check where the wood framing sits on top of the foundation wall. Look around window wells and unfinished walls. Outside, check porches, steps and decks that touch soil. Wood should stay several inches above the ground.
A year of termites in Longmont.
- Spring: swarm season in Longmont, often on a warm day after rain. Check windowsills for wings. - Summer: with highs around 88°F in Longmont, termites follow moisture, so watch AC drain lines, sprinkler zones and hose bibs. - Fall: with about 14 inches of rain a year in Longmont, make sure gutters and downspouts carry water well away from the foundation. - Winter: a good time to book an inspection in Longmont, before swarm season starts.
What happens at an inspection.
A moisture meter and a probe help them find hidden activity. Afterward, ask them to show you what they found. Photos help. Most inspections take an hour or two. The inspector walks the outside of the house first. They check the foundation, the soil line and nearby wood. Inside, they check the garage, baseboards, plumbing gaps and the attic. They'll check the basement walls and sill plate.
Termites or ants?
- Waist: termites are thick through the middle. Ants are pinched. - Antennae: termite antennae are straight. Ant antennae bend like an elbow. - Debris: termites leave mud. Carpenter ants leave sawdust. - Tunnels: termite galleries are packed with mud. Ant tunnels are clean and smooth. - Wings: termite wings are all the same length. Ant wings aren’t.
Getting ready for treatment day.
Keep kids and pets inside while the Longmont crew applies the product, and ask how long to stay off treated soil. Around Longmont, swarms usually show up between February and June, often the day after rain. Drill holes in slabs or patios get patched afterward. Prep is light for liquid treatments and bait stations. Clear a walking path along the exterior walls. Move boxes away from garage walls. Flag sprinkler heads and buried lines.
Mulch and termites.
Pull mulch back from the foundation and keep the layer thin. A dry gap along the house makes mud tubes easier to spot; in Longmont's dry climate the risk is irrigation and leaky hose bibs rather than rain. Wood chips touching the siding trap the moisture termites are after.
Questions to ask before you sign.
- What product or system will you use? - Is the whole foundation treated, or just one spot? - What does the warranty cover, and for how long? - What does the yearly renewal cost? - What do I need to do before and after treatment? - Which termites did you find, and where?
What affects the price
- Warranty type: retreatment only or damage repair.
- Linear feet of foundation to be treated.
- Liquid barrier versus bait station system.
- Attached garages, decks, and additions.
- Time of year and how booked up local companies are.
- Slab, crawl space, or basement construction.
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What's your biggest concern about termites?
When to call for help
Lenders often ask for one. It's also the cheapest termite service. Carpenter ants leave clean tunnels and sawdust. Termites leave mud. Call if you see mud tubes, pellets or an indoor swarm. Hollow-sounding wood is another clue. Buying or selling? Get a wood-destroying insect (WDI) report either way.
What you can do yourself
Treating an active colony is harder. The product has to reach the whole colony. It also needs even coverage around the entire foundation. Store-bought sprays usually kill only the termites you see. Some of the work is yours. Pull mulch back from the foundation. Fix leaks and clear gutters. Keep firewood away from the house.
Termites in Longmont
A typical home in Longmont is worth around $550k, which puts a few hundred dollars for an inspection and prevention in perspective. Longmont has a semi-arid climate, and termites activity here tends to pick up spring swarm season (March-May), warmer earlier in the south. Across Longmont, most of the housing is suburban, so the usual entry points, moisture spots, and sheltered areas near the structure are what an inspection checks first. Across Longmont, take a minute to note where you have seen activity and when it appears, so the inspection is faster and the quote more accurate. A local provider who knows Longmont and Colorado can point out the specific conditions that matter most here before you commit to a plan. Longmont only sees about 14 inches of rain a year, so local termites gather wherever water collects, like sprinkler zones, hose bibs and AC drain lines. Termites are a steady, moderate risk in Colorado. Not every house gets them, but plenty do. With summer highs around 88°F, Longmont's semi-arid climate decides when local termites are busiest.
Local research
Termites in Longmont, CO: what the public record shows
Before you compare quotes, it helps to know which termites actually live in Colorado, when they are busiest around Longmont, and what the state figures look like. Everything below links to the agency or university page it came from.
When termites are busiest around Longmont
February–June (eastern subterranean, daytime after rain). Penn State: 'In Pennsylvania, swarms of winged termites usually emerge between February and June'. NC State: native species 'begin swarming in late winter and continue into September or October', and 'Swarming usually occurs during the day, particularly on warm days following rain'. Kentucky: 'Spring typically is when large numbers of winged termites... emerge inside homes'. Ohio: 'Eastern subterranean termites swarm over spring and early summer'. Missouri: swarms 'during the spring months, usually on a warm, sunny day following rain'.
Based on Longmont’s semi-arid climate profile.
Sources: University of Georgia Extension; University of Missouri Extension. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep termites away
- Repair rotting trim, fascia, and window frames.
- Fix leaking hose bibs, faucets, and pipes promptly.
- Never leave form boards or scrap lumber in the soil.
- Paint or seal exposed exterior wood.
- Check the foundation for mud tubes every spring.
- Caulk gaps around plumbing and utility penetrations.
In an apartment building, termites travel through shared walls and slab joints, so one unit's problem is the whole building's problem.Did you know?
Across Longmont, termites are closer cousins to cockroaches than to ants, despite the old nickname white ants.
Across Longmont, soldier termites can't feed themselves, so the workers feed them mouth to mouth.
Questions people ask
How long does termite treatment take?
Bait stations take a few hours to install. Fumigation takes two to three days. A liquid barrier takes half a day to a day.
How do I choose a termite company?
Ask what the warranty covers. Compare the proposals, not just the totals. Make sure they're licensed in Colorado. Ask which termites they found and what product they'll use.
Can I treat termites myself?
The product must reach the whole colony. It also needs even coverage around the foundation. Store-bought sprays usually kill only what you see. Prevention, yes. An active colony is harder.
Are mud tubes always a sign of active termites?
Break off a piece and check back in a week. If it's rebuilt, they're active. Not always. Old tubes can stay on a wall for years.
How much does termite treatment cost?
Treat it as a benchmark, not a promise, since house size and method drive the quote. A good pro in Longmont will explain how their plan fits what they found at your home. For a homeowner budgeting a termite job, the professional-reported average post-construction price in Pest Control Technology (PCT) magazine's 2025 termite market report (about 145 respondents, 2024 pricing) was $1,100.
How do I know if I have termites or ants?
Across Longmont, termites are best caught early through inspection, because the damage is hidden inside wood until it is far along. Across Longmont, a professional inspection looks for mud tubes, damaged wood, and swarming activity, and treatment targets the soil and the colony rather than just the visible wood.
Are termites common in Colorado?
Around Longmont, the usual culprit is the arid-land subterranean termite.
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Sources (11)
The facts in this article come from the public sources listed above. Every home is different, so ask the company you talk to about pricing and what’s included. Published by Termite Exterminator · Updated September 11, 2026 · How we write these guides