Your lender’s email says you need a “WDIIR” before closing. The purchase contract has a line for it. Nobody explained what it is. If that’s where you are right now, you’re not alone, and the abbreviation is worth understanding before your transaction moves another step forward.
A Wood Destroying Insect Inspection Report is an Arizona state-regulated document. It isn’t issued by a home inspector or a real estate agent. Only a company licensed by the Arizona Department of Agriculture (AZDA) Pest Management Division can prepare one, and the format follows state standards. That regulatory structure matters because it means the report carries legal weight and specific limitations that affect how buyers should read it and act on it.
We’ve been completing these reports for Phoenix-area buyers for over 20 years. What follows is a plain-language walkthrough of what the WDIIR actually covers, how to read the findings, and what to do when the report comes back with something on it.
What a WDIIR Is & Why Lenders Require It
The WDIIR reports on visible evidence of wood-destroying insects, prior treatment history, and property conditions that make termite activity more likely. Arizona state law governs the format and standards, but it doesn’t require a WDIIR for every home sale. The requirement typically comes from the lender: VA loans, FHA loans, and many conventional lenders all have their own rules about when a WDIIR must be completed before they’ll fund.
One detail buyers often miss: the report covers more than termites. Wood-destroying insects under the WDIIR standard include subterranean termites, drywood termites, carpenter ants, carpenter bees, and wood-boring beetles. If any of these are present or have left evidence, the report will say so.
What the Report Actually Contains
The WDIIR is a two-page document. Page one covers the basics: property information, whether the inspector found visible evidence of active infestation, whether prior treatments have been performed, which areas were inaccessible during the inspection, and whether any corrective measures were completed on the day of the inspection. Page two is a structural diagram that maps areas of concern, locations of prior treatments, and any zones that were obstructed or restricted.
The report also carries a disclaimer printed on its face, and buyers should read it carefully. The WDIIR isn’t a structural damage report. It doesn’t assess fungi or mold. It isn’t a warranty, and it isn’t a guarantee that wood-destroying insects are absent. It documents what was visible and accessible on the day of inspection. Understanding that scope prevents the most common misreading buyers make: treating a clear report as a permanent clean bill of health.
How to Read the Findings Before You Close
Not all findings are equal. The WDIIR distinguishes among four conditions, and the difference between them shapes what happens next in your transaction.
- No visible evidence: No signs of current or prior wood-destroying insect activity were found in accessible areas.
- Visible evidence of prior activity: Signs of past infestation exist, but no active insects were observed. Old damage may be present.
- Active infestation: Live insects or fresh evidence of current activity were found. Treatment is required.
- Conducive conditions: No active insects were found, but conditions on the property such as wood-to-soil contact, moisture intrusion, or vegetation against exterior walls create elevated risk for future infestation.
The conducive conditions category is where VA loan buyers need to pay close attention. Under the Arizona state WDIIR form, VA lenders have historically required conducive conditions to be corrected before closing, not just documented. The federal NPMA-33 form, used in other states and sometimes requested alongside the Arizona form for VA transactions, operates differently: it reports on visible evidence of wood-destroying insects and visible damage but doesn’t include a dedicated conducive conditions section. If you’re buying with a VA loan in Phoenix, ask your inspector whether your lender requires the NPMA-33 in addition to the state form. Getting that clarification early can prevent a last-minute delay at closing.
There’s also a practical research step buyers can take before the inspection even happens. The AZDA maintains a public database called the Termite Action Report Form (TARF) search tool, accessible at tarf.azda.gov. Arizona state law requires licensed pest control companies to file a TARF with the AZDA Pest Management Division after every termite treatment, and those records are public. The database lets you search any Arizona property address and see filed treatment records going back three years. If the home you’re buying has a history of treatments, you can find that before your inspector walks in the door.
What Happens When the Report Shows Findings
A finding on a WDIIR isn’t automatically a deal-killer. How your transaction moves forward depends on what type of finding it is.
Active Infestation Found
If the report notes active infestation, the lender will require treatment before the loan closes. After treatment is completed, a supplemental WDIIR is prepared to document that the corrective work was done. That supplemental report is what the lender needs to see before funding.
Prior Activity or Conducive Conditions Found
Evidence of prior activity without active insects is a different situation. Inspectors distinguish between old damage that no longer represents an active risk and live colonies that require immediate attention. That distinction affects how you negotiate, and it’s worth asking your inspector to walk you through exactly what they found and what it means for the property now.
Who pays for treatment and any required repairs is a negotiated term in the purchase contract, not a fixed legal rule. In Arizona, it’s common for the buyer to cover the inspection cost and for the seller to pay for any required treatment, but neither party is legally required to follow that pattern. It’s a contract term, negotiable like any other.
Why Inspector Thoroughness Matters for Your Phoenix Home
Because the WDIIR is a non-destructive visual inspection, the inspector can’t open walls, cut into framing, or access sealed voids. What they can examine is everything that’s accessible: the full perimeter, attic framing, plumbing penetrations, weep screeds, and crawl spaces where applicable. The thoroughness of that visible inspection is what both the lender and the buyer are relying on.
Phoenix-area homes face pressure from two distinct termite species. Subterranean termites enter through foundation fissures and move through the soil; Maricopa County’s soil conditions support year-round subterranean activity. Drywood termites enter above grade and can establish colonies in attic framing and wall voids without any soil contact at all. Knowing where each species is likely to show up and where their entry points and evidence patterns differ is what separates a thorough inspection from one that misses something.
A WDIIR is only as reliable as the inspection behind it. At Arizona Termite Specialists, termite inspection is all we do. Our team holds AZDA licenses, and our founders bring more than 20 years of termite-focused field experience, including co-founder Jeremy Youngquist’s work with BASF on termite treatment methods. If you’re working against a closing timeline, we offer free estimates and same-day availability. Reach us at (602) 900-9799.