Termite Inspection in McKinney, TX: What Collin County's Blackland Clay Means for Your Home

If you own a home in McKinney, a termite inspection is one of the cheapest forms of insurance you can buy — and the soil under your slab is exactly why. McKinney sits on the Blackland Prairie, where heavy clay swells in the wet season and cracks open in drought, creating the soil-to-foundation gaps that subterranean termites use to find their way into Texas homes. Most McKinney yards already have termites living in the soil; the question is whether they've found a way inside yet. A professional inspection answers that question before a small problem becomes a structural one.

Root Home Services is a family-owned, veteran-owned company that has protected Texas homes and businesses for six years with zero safety incidents. Our technicians live in the same Collin County neighborhoods we serve — no national call center — so we know how local soil, weather, and home age stack the deck for termites. Here's what every McKinney homeowner should understand.

Do I need a termite inspection in McKinney?

Yes — and there are two situations where it matters most: when you're buying or selling a home, and when you spot any of the warning signs below. In Texas, termites are so widespread in the soil that "do I have termites in my yard?" is almost always yes; the real job of an inspection is to find out whether they've crossed from the soil into the structure, and where your home is most exposed.

Texas A&M AgriLife Extension puts it plainly: in Texas, termites abound in the soil wherever wood is found, and most yards — especially in established neighborhoods — support them. That's not a reason to panic. It's a reason to inspect on a sensible schedule rather than wait for visible damage, because by the time termite damage shows up on the surface, the colony has usually been working out of sight for a while.

Why McKinney homes sit in a termite hot zone

McKinney's vulnerability comes down to a combination of soil, growth, and home age that's specific to Collin County.

The Blackland clay problem

McKinney is built on the Texas Blackland Prairie, and its dominant soil is Houston Black — a "vertisol" that is 60–80% clay, made largely of the swelling mineral smectite (montmorillonite), according to soil descriptions from USDA-NRCS and Texas A&M sources. This clay behaves dramatically with moisture:

• In wet weather it swells, pressing up against foundations.
• In drought it shrinks and cracks — vertisols can open fissures up to 4 inches wide and 6 feet deep.
• The result is differential movement: one corner of a slab lifts while another settles, opening hairline gaps in the foundation.

Those seasonal cracks and foundation gaps are the issue. Subterranean termites live in the soil and need soil contact and moisture to survive — and the clay's cracking gives them ready-made highways straight up to the concrete and the wood framing above it. The same shrink-swell that gives North Texas its reputation for foundation repair is quietly handing termites a way in.

Explosive growth and home turnover

McKinney is one of the fastest-growing cities in America. The U.S. Census Bureau and local reporting put McKinney's 2026 population around 243,498 — up 23.3% from the 2020 count of 197,507 — and the city added more than 8,500 residents between mid-2024 and mid-2025, ranking 10th nationally for numeric growth. Collin County as a whole gained 42,966 residents in that single year (+3.4%, to nearly 1.3 million), the second-largest county gain in the entire U.S.

What does growth have to do with termites? Two things. First, all that buying and selling means a constant stream of homes changing hands — and most transactions involve a termite inspection (more below). Second, McKinney's housing is a mix of brand-new construction and established 1990s–2000s neighborhoods; new slabs poured on reactive clay and older homes with decades of soil movement are both exposed.

What kinds of termites are in Collin County?

The vast majority of termite problems in McKinney come from native subterranean termites in the genus Reticulitermes — the common, widespread termite pest across Texas, per AgriLife. But Collin County homeowners should know about a second, more aggressive species, too.

The Formosan subterranean termite (Coptotermes formosanus) is a non-native, more destructive termite that has been confirmed in roughly 30 counties in the eastern half of Texas — including both Collin and Dallas Counties, according to Texas Invasives and Texas A&M's field guides. It's still far less common here than our native termites, and isolated North Texas finds have often been tied to recycled railroad ties and landscape timbers that move colonies around. AgriLife's guidance is reassuring on this point: for most North Texas homeowners, the native Reticulitermes is the primary concern, and a Formosan-specific warranty usually isn't necessary unless there's a known local infestation. Still, knowing the difference helps you ask your inspector the right questions.

Trait	Native subterranean (Reticulitermes)	Formosan subterranean (Coptotermes formosanus)
Status in Collin County	The common, widespread termite pest in McKinney	Confirmed in some North Texas counties (incl. Collin/Dallas); still uncommon, often tied to imported timbers
Colony size	Tens of thousands up to ~1 million	Can reach several million — much larger
Swarm timing	Daytime, February–May (spring)	Late spring into early summer, often at dusk/evening
Damage pace	Significant over time	More destructive; faster-feeding
Treatment	Soil-applied liquid barrier or bait	Same tools, with stronger emphasis on warranty + monitoring

When do termites swarm in McKinney?

Termite swarms in Texas are most common from February through May, AgriLife reports, and the trigger is soil warming. Subterranean termite colonies become active once soil temperatures hold steady around 65°F, and swarms typically launch on warm, humid days — often right after a spring rain. Native Reticulitermes swarmers fly during daylight; Formosan swarmers, where present, tend to fly later in spring and at dusk.

A swarm is the colony's way of reproducing: winged reproductive termites ("swarmers") leave to pair off and start new colonies. The swarmers themselves don't damage your home — but finding them indoors is one of the most reliable signals of an active infestation, because it means a mature colony is established nearby. McKinney's spring rains and warm clay make March through May the season to stay alert.

What are the signs of termites in a McKinney home?

Watch for these, and call for an inspection if you see any of them:

• Mud shelter tubes — pencil-width hollow tunnels of soil running up your foundation, pier, or slab edge. AgriLife describes these as runways termites build between their underground nest and your home. If you find one, leave part of it intact for a professional to examine.
• Swarmers or discarded wings indoors — dark, roughly 3/8-inch winged insects, or little piles of equal-length shed wings on windowsills and near light sources in spring.
• Termite vs. ant confusion — termite swarmers have a straight waist and equal-length wings; ants have a pinched waist and longer front wings. The difference tells you which problem you're dealing with.
• Hollow-sounding or blistered wood — wood that sounds papery when tapped, or trim and baseboards that look like they have rippling or water damage.
• Stuck windows and doors or new drywall cracks — sometimes a sign of the foundation movement that also opens termite entry points.

Because subterranean termites work from the soil up and inside wall voids, a lot of activity stays hidden. That's why a trained eye matters more than a casual look.

Termite inspection vs. WDI report: what McKinney buyers and sellers need

This trips up a lot of people in a high-turnover market like McKinney, so it's worth being precise.

A general termite inspection is a visual check of your home for signs of wood-destroying insects and the conditions that invite them. AgriLife notes these inspections are often free — unless you need a formal report for a real estate transaction.

A WDI report (Wood Destroying Insect report) is the official document lenders and buyers ask for during a home sale. In Texas:

• The Texas Department of Agriculture (TDA) prescribes the official form (the Texas Official Wood Destroying Insect Report, NPMA-33) and requires it for real estate transactions under its rules.
• Only a TDA-licensed Wood Destroying Insect inspector can legally perform the inspection and issue that report. A general home-inspector license alone doesn't cover it.
• VA loans typically require a WDI report in termite-pressure states like Texas, and some FHA and conventional lenders request one case by case.
• A WDI report is generally valid for about 30 days, so timing it close to closing matters.

If you're buying or selling in McKinney, build the WDI inspection into your timeline early — and make sure whoever performs it holds the right TDA license. If you're simply a homeowner who wants peace of mind, a standard inspection is the place to start.

How Root inspects and treats termites in McKinney

When you call Root Home Services, a local Collin County technician inspects your foundation line, slab penetrations, and the areas where soil meets structure — the spots McKinney's clay makes most vulnerable. We'll show you what we find, explain whether it's an active infestation or just risk factors to correct, and lay out your options without pressure.

For treatment, there's no single right answer — and we'll match the approach to your home:

• Soil-applied liquid termiticides create a treated zone termites can't cross. AgriLife's long-running Texas trials found today's registered termiticides last four to ten years, with soil treatments persisting five years or more. AgriLife also notes that non-repellent termiticides — which termites can't detect and carry back to the colony — tend to perform better in Texas's alkaline, heavy clay soils, exactly what's under McKinney.
• Bait systems use foraging worker termites to carry a slow-acting product back to suppress or eliminate the colony, and are often the choice when a homeowner wants the lowest-pesticide approach.

Whichever path fits, our work is designed to be safe for People, Pets & Plants — the standard behind our six years and zero safety incidents — and as a simple precaution, we'll walk you through any short re-entry windows before we begin. This is the same integrated pest management mindset we bring to every Root service: inspect first, treat precisely, and prevent rather than just react. A few habits help between visits, too — keeping stacked firewood, mulch, and debris away from the foundation reduces both termite entry points and the places they hide.

Termites are just one of the common Texas pests we handle. Root runs full-service pest control across McKinney and Collin County, and you can learn more about how we serve McKinney homes and businesses on our local page. We also cover the broader metro — see our guides to pest control in nearby Plano and fire ant control across DFW — and you can always read up on subterranean termite biology in our pest library.

Sources: Texas A&M AgriLife Extension — FAQ About Subterranean Termite Control and Subterranean Termites; Texas A&M Field Guide to Common Texas Insects — Termites; National Pest Management Association — Subterranean Termites; Texas Department of Agriculture — Texas Official Wood Destroying Insect Report (NPMA-33); USDA-NRCS / Texas Blackland Prairie soil descriptions (Houston Black vertisol); U.S. Census Bureau population estimates via Local Profile and World Population Review. General termite inspection and treatment information is educational and not a guarantee of specific outcomes; have your home evaluated by a licensed professional.