WDI Termite Inspections in San Antonio: What Buyers Need to Know Before Closing
Termites work quietly. They can spend years eating through a home's wood framing without leaving much visible evidence behind. By the time a homeowner notices sagging floors or hollow-sounding trim, the damage may already be significant.
South Texas has a warm climate that lets termites stay active for much of the year. That's why a WDI termite inspection is one of the smartest add-ons a San Antonio buyer can choose.
What Does "WDI" Mean?
WDI stands for Wood Destroying Insects. A WDI inspection looks for evidence of insects that damage wood in a home's structure, including:
Subterranean termites, the most common type in Texas, which live in the soil and travel up into the home.
Drywood termites, which live directly inside the wood they eat.
Carpenter ants, which tunnel through damp or softened wood.
Wood-boring beetles, which leave small exit holes in wood surfaces.
The inspector also looks for conducive conditions — things around the home that make an infestation more likely.
Is a WDI Inspection the Same as a Home Inspection?
No. A general home inspection evaluates the home's structure, roof, electrical, plumbing, and HVAC systems. An inspector may note visible wood damage, but a WDI inspection is a separate, focused evaluation specifically for wood-destroying insect activity and damage. In Texas, WDI inspections are performed by licensed professionals and documented on a specific report form.
Many lenders — especially for certain loan types — require a WDI report before closing. Even when it isn't required, it's worth having.
Warning Signs of Termites You Can Spot Yourself
During your showings, keep an eye out for these clues:
Mud Tubes
Subterranean termites build pencil-width mud tubes along foundations, walls, and piers to move between the soil and wood. They're one of the clearest signs of activity.
Discarded Wings
After swarming season (often spring in South Texas), termites shed their wings. Small piles of wings near windowsills or doors are a red flag.
Hollow or Damaged Wood
Tap on baseboards, door frames, or trim. Wood that sounds hollow, feels soft, or crumbles easily may have internal damage.
Bubbling Paint or Tiny Holes
Paint that bubbles or blisters can indicate moisture or termite tunneling underneath. Tiny holes and fine powder may point to drywood termites or beetles.
Sticking Doors and Windows
Termite damage can distort frames, making doors and windows hard to open. This can also be caused by foundation movement, so it's worth checking both — see our guide to foundation inspections.
Conducive Conditions Inspectors Look For
Even if no termites are found today, certain conditions make future problems more likely:
Wood-to-soil contact, such as siding, fences, or trim touching the ground
Mulch or soil piled against the slab, especially above the foundation edge
Moisture problems, like leaking faucets, poor drainage, or AC condensate lines dripping near the foundation
Wood debris or stored lumber near or under the home
Dense vegetation touching the exterior walls
Exterior wood is especially vulnerable. If the home you're considering has wood siding, trim, or decks, our article on what everyone should know before buying a home with exterior wood is a helpful companion read.
How Technology Helps Find Hidden Activity
Termites hide inside walls, so a visual inspection has limits. Tools like thermal imaging can help detect moisture and temperature anomalies that sometimes point to hidden activity or conditions that attract termites. Learn more in our post on infrared thermography.
New Construction Isn't Automatically Safe
It's easy to assume a brand-new home is termite-free. Builders typically apply a pre-treatment, but treatments can be incomplete, and landscaping installed after construction can create conducive conditions right away. Pairing a WDI inspection with new construction inspections — or checking again before your builder warranty ends with a builder warranty inspection — helps protect a new investment. Our blog on why you need an inspection on a new house before closing explains more.
What Happens If Termites Are Found?
A positive finding doesn't have to end the deal. It gives you information to act on:
Get a treatment estimate from a licensed pest control company.
Evaluate structural damage — heavy damage may need a contractor's assessment.
Negotiate repairs, treatment, or a credit from the seller during your option period.
Ask about existing warranties — some homes already have a transferable termite treatment warranty.
Schedule Your WDI Inspection With Your Home Inspection
The most efficient approach is to book your WDI inspection at the same time as your general inspection. You'll get complete information in one visit and plenty of time to negotiate. Check our pricing page for add-on options, and read our inspection prep guide so the inspector can access the attic, garage, and exterior foundation.
Want the bigger picture on why inspections matter? Read how a professional home inspection can help you make confident decisions.
Protect your investment from what you can't see. Contact Code Blue Home Inspections to schedule a WDI termite inspection in San Antonio and surrounding areas.
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