Termites silently chew through more than $5 billion in U.S. homes every year — and Durham's humid Piedmont climate is prime termite territory. As a licensed exterminator Durham NC homeowners have trusted since 2011, Castle Exterminators offers termite control Durham families rely on: proven inspection, baiting, and liquid soil treatments that wipe out colonies and keep them out, year after year — one of our most-requested Durham pest control services.
Our termite treatment process, start to finish
Step 1 — Free inspection. A licensed technician walks your entire property: crawl space or slab perimeter, sill plates, floor joists, foundation exterior, attic framing, garage, and any outbuildings. We probe suspect wood, look for active mud tubes, check moisture readings around the sub-structure, and photograph anything that matters. You get a plain-English report the same day.
Step 2 — Species ID and pressure assessment. Almost every active infestation in Durham is Reticulitermes flavipes, but occasionally we find drywood or Formosan activity — and the treatment plan changes accordingly. We also grade the property's termite pressure (low / moderate / high) based on soil contact, moisture, mulch beds, tree stumps, and neighborhood history.
Step 3 — Personalized treatment plan and written quote. Based on what we found, we recommend one of three approaches (below), or a hybrid. You get a written scope with the products we'll use, where they go, how long it takes, and the warranty terms — before you sign anything.
Step 4 — Treatment day. Most Durham homes are treated in one visit lasting 2–4 hours. You can stay home the entire time. We trench and treat the exterior perimeter, drill and inject through slab or masonry where needed, and/or install in-ground bait stations at 10-foot intervals around the structure.
Step 5 — Follow-up and annual re-inspection. Every termite job comes with an annual re-inspection, so a new colony trying to move in gets caught early. If active termites come back inside the warranty period, we come back and re-treat at no charge.
Liquid barrier vs bait stations — which is right for your home?
Liquid termiticide (non-repellent, e.g. Termidor): Applied as a continuous soil barrier around the foundation. Termites contact the treated soil, carry the active ingredient back to the colony, and the whole colony collapses within weeks. Best for homes with active infestations, homes on slabs, and homes where you want the strongest possible perimeter protection. Typical residual: 7–10 years.
In-ground bait stations (e.g. Sentricon / Advance): Sealed cellulose-and-active-ingredient stations installed every 10 feet around the foundation. Foragers find the bait, share it colony-wide, and the colony is eliminated within a few months. Best for homes with well vegetation nearby, homes over crawl spaces where drilling is disruptive, and homeowners who want a lower-disturbance, continuously-monitored solution. Stations are inspected and refreshed annually.
Hybrid approach: On homes with confirmed active infestation, we frequently pair a liquid barrier to knock out the immediate threat with bait stations for long-term monitoring. Which one we recommend depends on what we find during the inspection — that's the whole point of walking your property first.
Termite swarm season in Durham — what to watch for
In the Triangle, subterranean termite swarms typically start in late February and peak from March through May, usually on warm afternoons following a rain. If you see winged insects near interior windows, light fixtures, or crawl-space vents in early spring, take a photo and send it to us that day — swarmers indoors are the single clearest sign of an active colony inside or under your home.
Even outside swarm season, termites forage year-round in NC because our soils rarely freeze deep enough to stop them. That's why we recommend a professional inspection every spring, and why real estate transactions in North Carolina almost always require a current WDIR (Wood-Destroying Insect Report, form NPMA-33) before closing.
Why homeowners get a personalized quote — never a flat rate
Every home we treat is different. A 1,200-square-foot slab ranch in East Durham needs a completely different treatment scope than a 4,000-square-foot crawl-space home in Woodcroft with a finished basement addition. Foundation type, linear footage, soil access, existing damage, warranty length you want, and whether we're treating preventively or knocking out an active colony all move the number. That's why we don't publish a "termite price" — a flat rate would either overcharge small homes or under-treat big ones. Book the free inspection, we'll walk your property, show you what we find, and give you a written quote personalized to your home. No pressure, no upsell, no obligation.
Common signs you need help
- Mud tubes running up your foundation or crawl-space walls (the #1 diagnostic sign)
- Soft, hollow-sounding wood around windows, door frames, or baseboards when tapped
- Discarded wings near interior light sources or window sills after a spring swarm
- Tiny piles of pellet-like frass (drywood termite droppings) near wood
- Bubbling, blistered, or uneven paint that looks like water damage but the source is dry
- Sagging or springy floors, especially over the crawl space
- Tight-fitting doors and windows that suddenly won't close (wood swelling from termite moisture)
How Castle Exterminators handles it
Free property inspection
Licensed technician walks interior, exterior, crawl space, and attic. We probe wood, take moisture readings, and document everything with photos. You get a plain-English report the same day — no obligation.
Species ID and pressure grading
We confirm you're dealing with subterranean, drywood, or (rarely) Formosan termites, and grade the property's termite pressure. Treatment plan flows from that, not from a script.
Personalized written quote
You get a written scope — products, application points, timeline, and warranty terms — before we begin. Every quote is personalized to your home; no flat rates, no surprises.
Treatment day (2–4 hours)
Liquid termiticide barrier, in-ground bait stations, or a hybrid — depending on what we found. Most Durham homes are done in a single visit and you can stay home the whole time.
Annual re-inspection & warranty
Every termite job includes an annual re-inspection so new colony activity gets caught early. If live termites return during the warranty period, we come back and re-treat at no charge.
Frequently asked questions
Are your termite treatments safe for kids and pets?
Yes. We use EPA-registered non-repellent termiticides applied below ground level or inside sealed bait stations, so there is no interior exposure. Kids and pets can be home during the appointment and there is no re-entry wait time.
How long does a termite treatment take?
Most Durham homes are treated in a single visit lasting 2–4 hours. Larger homes or homes with complex foundations may take a full day. Bait station installs are typically finished in 90 minutes.
How much does termite treatment cost in Durham?
Pricing depends on foundation type, linear footage, whether termites are already active, the warranty length you want, and access conditions. Rather than publish a flat rate that would either overcharge small homes or under-treat big ones, we personalize the quote after a free inspection so you know exactly what your home needs — and what it costs — before you commit.
How long does a Castle termite warranty last?
Standard warranty is one year with annual renewal, and we offer extended warranties out to five years or more depending on the treatment plan. If active subterranean termites return during the warranty period, we re-treat at no additional charge.
Can I do termite control myself with over-the-counter products?
For carpenter ants or minor pest issues, sure. For subterranean termites, no. Effective treatment requires trenching the full foundation perimeter, applying registered termiticides at label rates, and (often) drilling through slab or masonry — plus a WDIR form that only a licensed NC operator can produce. DIY termite work almost always misses the colony and delays the real fix by months or years.
Do I need a termite report to sell my house in Durham?
Almost certainly yes. Most NC real-estate contracts and virtually all mortgage lenders require a current Wood-Destroying Insect Report (form NPMA-33) within 30 days of closing. We produce these routinely — we can typically inspect, treat if needed, and issue the WDIR within a week for a normal transaction timeline.
What is a WDIR and do you provide one?
A WDIR (Wood-Destroying Insect Report) is the standardized NPMA-33 form used at real-estate closings across NC. It documents visible evidence of termites, carpenter ants, powderpost beetles, and wood-decay fungi. Yes — as a licensed NC Structural Pest Control operator (#1979PW), we issue WDIRs for closings across the Triangle.
How soon can you get out for an inspection?
Same-day or next-day inspections are usually available across Durham, Chapel Hill, Raleigh, Cary, Morrisville, and Hillsborough. If you're under a closing deadline, tell us the date and we'll work to hit it.