Buying a home is already stressful. Adding a termite report to the stack of documents can feel like one more thing to interpret under pressure, especially when the deal timeline is tight. Texas has some of the highest subterranean termite pressure in the country, and both Houston and Austin sit in areas where Formosan and eastern subterranean termites are active year-round. Understanding what a Wood-Destroying Insect (WDI) inspection actually covers before you're in the middle of a negotiation puts you in a far better position to ask the right questions.

Termite inspection at a glance

• What it is: A visual inspection of accessible areas for evidence of wood-destroying insects, including termites, beetles, and carpenter ants.
• Risk level in Texas: High. The state sits largely in USDA termite infestation probability zones 1 and 2, the two highest designations [1].
• First steps: Request a WDI report (often called a CL-100 or Section 1 report depending on lender requirements) before closing. Read the full report, not just the summary box.
• Inspection checklist: Crawl spaces, garage framing, attic trusses, exterior wood-to-soil contact, and any visible mud tubes at the foundation.
• When DIY is appropriate: Monitoring your own home after purchase. A licensed inspector is required for any formal WDI report used in a real estate transaction.
• When to call a licensed pro: If the report lists active infestation, previous treatment, or visible damage to structural members, consult a licensed structural pest control professional in Texas before you commit to the purchase.
• Houston vs Austin nuance: Houston's clay soils and high humidity create near-ideal conditions for Formosan termites year-round. Austin's limestone foundation construction reduces below-grade wood contact, but the cedar and oak tree canopy creates a different moisture environment around structures.

What a WDI inspection covers (and what it doesn't)

A Wood-Destroying Insect report is a point-in-time visual inspection. The inspector walks the accessible areas of the structure and looks for evidence of wood-destroying organisms, which in Texas typically means subterranean termites, drywood termites, carpenter ants, and certain wood-boring beetles. They are not doing a full structural assessment, and they are not looking inside walls, under flooring, or behind built-ins.

The Texas Department of Agriculture licenses the professionals who conduct these inspections, and the report format is regulated. What you receive is a document noting whether evidence was found, what evidence, and where. A clean report means the inspector found no visible evidence on the day of inspection. It is not a guarantee.

This distinction matters. A home can have termite damage inside walls or subflooring that does not show any surface evidence yet. That is not inspector negligence; it is a limitation of visual inspection.

What inspectors actually look for

Mud tubes. Subterranean termites build shelter tubes out of soil, wood particles, and saliva to travel between the soil and their food source. Inspectors check along the foundation, sill plates, piers, and any vertical surface connecting wood to grade. A pencil-width mud tube on a foundation pier is one of the more reliable visible signs of subterranean termite activity [2].

Frass. Drywood termites push waste pellets out of their galleries through small kick-out holes. Finding small piles of pellets, which look a bit like coarse sawdust or coffee grounds, near wood members in an attic or along windowsills suggests drywood activity.

Damaged wood. Inspectors probe wood with a screwdriver or awl in areas where damage is suspected. Termite-damaged wood often sounds hollow and may collapse inward under light pressure. In subterranean infestations, the damaged galleries run with the grain and are typically filled with soil.

Previous treatment evidence. Chemical treatment stakes around the perimeter, drill holes in concrete slabs, or patched entry points in the foundation are signs of past treatment. This is documented on the report and is not automatically disqualifying, but it tells you the home has had a history worth investigating.

Wood-to-soil contact. Form boards left against the foundation, wood debris under the structure, and fence posts that butt up against exterior siding are all flagged because direct contact between soil and wood is one of the primary conditions that invites subterranean termite activity in the first place.

Why Houston and Austin homes carry different risks

Houston's Gulf Coast humidity, combined with the region's heavy clay soils that hold moisture close to foundations, creates conditions where Formosan termites are particularly well-established. Formosan subterranean termites are more aggressive than the native eastern subterranean species: they form larger colonies and can consume wood faster [2]. Pier-and-beam homes, which are common in older Houston neighborhoods, give inspectors better access to crawl spaces, but also give termites more wood to contact at grade.

Austin homes often sit on shallow limestone or caliche, which means slab-on-grade construction is the norm. That reduces wood-to-soil contact at the foundation level. The trade-off is that many Austin properties have mature oak and cedar trees, which can create consistent moisture and debris around the structure. Drywood termites are more prevalent in central Texas than on the Gulf Coast, so the evidence you might find looks different, frass and exit holes rather than mud tubes.

How to read the WDI report before closing

The report will have boxes for: evidence of active infestation, evidence of previous infestation, evidence of previous treatment, and conditions conducive to infestation. Each box applies to specific areas of the structure.

A box checked for "previous infestation" with no active infestation noted is not unusual in older Texas homes. The question to ask is whether the damage was repaired and what treatment was applied. If the report shows active infestation or significant structural damage, you have a few options: request remediation as a condition of sale, negotiate a price reduction to cover professional treatment and repairs, or walk away.

Before closing on any home with checked boxes, ask the seller for documentation of any previous treatment, including the company name, treatment method, and whether a renewable warranty exists. Many professional termite treatments carry annual warranty programs that transfer to a new owner, which changes the risk profile meaningfully.

DIY vs licensed help

You can absolutely monitor your own home for termite signs, and doing so annually is a good habit. Walk the perimeter in spring, check the garage framing, look at any wood near the soil. But for a real estate transaction, a licensed professional conducting a formal WDI inspection is required by most Texas lenders, and it is not something to skip even in a cash transaction.

If a WDI report identifies concerns, working with a licensed structural pest control professional in Texas for termite control gives you an independent assessment of what the report found, what treatment options exist, and what the monitoring and prevention plan looks like after purchase. IPM-based approaches prioritize identifying conditions that attract termites and correcting them before treatment enters the conversation.

Mistakes to avoid

• Skipping the WDI inspection in a competitive market. Time pressure does not change termite risk. A missed infestation can mean tens of thousands of dollars in structural repairs.
• Treating a clean report as a warranty. Visual inspections have real limitations. Budget for an annual inspection after purchase regardless.
• Ignoring conducive conditions on the report. Untreated, crawl space standing water or wood debris against a foundation are risk factors that will likely lead to problems.
• Not asking about warranty transferability. An existing treatment warranty with a reputable provider can have real monetary value at closing.
• Assuming new construction is low risk. Construction debris left under slabs and form boards abandoned against foundations are documented risk factors in newer Texas homes as well [1].

FAQ

Does a home sale in Texas require a termite inspection? There is no statewide law requiring one, but most lenders require a WDI report for financing, and it is strongly recommended for any purchase in Texas given the state's termite pressure.

How long does a WDI inspection take? Typically 45 minutes to an hour for an average-sized home, longer for pier-and-beam structures with accessible crawl spaces.

Who pays for the termite inspection? In Texas, it is typically the buyer's cost, though it is negotiable. Expect to pay $75 to $150 depending on the property and provider.

What happens if active termites are found? You can request the seller remediate before closing, negotiate a price reduction, or request an extended warranty as part of the sale terms. Active infestation is a legitimate reason to renegotiate.

Can a home fail a termite inspection? There is no pass or fail. The report documents findings. What you do with those findings is a matter of negotiation.

How soon after treatment can the inspection be done? This varies by treatment method. A licensed professional can clarify the appropriate timing before a report is ordered.

Wrapping up

A termite inspection before buying a home in Texas is as standard as a general home inspection, and in high-pressure markets it is easy to treat it as a formality. It is not. Reading the full report, asking about previous treatment history, and understanding what conducive conditions the inspector flagged gives you real leverage in the negotiation and a clearer picture of what you are taking on. If the report raises questions, a licensed structural pest control professional in Texas can walk you through what it means in practical terms for that specific property, whether you are looking in Houston, Austin, or anywhere in between.

Image suggestions

Image 1: Close-up photograph of subterranean termite mud tubes running vertically up a concrete foundation pier in a crawl space. The image should be well-lit to show the texture and color contrast against the concrete. Suggested alt text: "Subterranean termite mud tubes on a foundation pier in a Texas crawl space."

Image 2: An inspector using a probe or screwdriver to test a wooden sill plate in a crawl space, wearing protective gloves. Shot from a low angle to show the crawl space environment. Suggested alt text: "Licensed pest control inspector probing sill plate for termite damage during a WDI inspection."

References

[1] U.S. Department of Agriculture Forest Service. Termite Infestation Probability Zones Map. https://www.fpl.fs.usda.gov/

[2] University of Florida Institute of Food and Agricultural Sciences. Formosan Subterranean Termite, Coptotermes formosanus. https://entnemdept.ufl.edu/

Information in this article follows Integrated Pest Management principles and public homeowner guidance. For activity that might involve regulated products or when an infestation is severe, consult a licensed structural pest control professional in Texas.