By Rose Granados · Licensed Insurance Agent · Granados Insurance Agency
It's a form number most Texans have never heard of — until they're buying a coastal home, replacing a roof, or applying for windstorm coverage, and suddenly everything hinges on it. Here's what the WPI-8 windstorm certificate actually is, how to check whether your home has one, and how certification works, from a licensed agency in the windstorm territory.
A WPI-8 is the windstorm certificate of compliance — proof a structure or improvement was built to the coastal windstorm building code — and it's generally required for TWIA eligibility. The requirement covers structures constructed, altered, remodeled, enlarged, or repaired on or after January 1, 1988 in the designated territory — which includes roof replacements and additions, not just new homes. Since June 1, 2020, TDI issues all certificates: the WPI-8 for ongoing work (apply before construction starts) and the WPI-8-E for completed work (a Texas-licensed engineer inspects after the fact). The WPI-8-C, issued by TWIA from 2017–2020, remains valid. Check for existing certificates in TDI's online database — and if you're buying coastal, do it before closing, not after.
Nobody learns what a WPI-8 is out of curiosity. You learn because a windstorm application asks for it, a closing attorney can't find it, or a contractor mentions it halfway through your roof replacement. By then, the question is urgent — and the answer determines whether your coastal home can get windstorm coverage without complications.
We're a licensed Texas agency inside the designated windstorm territory, and certificate questions come up in our office weekly. This guide covers the whole subject in plain language: what the certificate is and the difference between its three versions, exactly who needs one, how to check whether your home already has one, the process for certifying ongoing work and completed work, and what your options are if a certificate is missing. Program details come from the Texas Department of Insurance and TWIA and can change; confirm specifics for your project. For how the certificate fits into the bigger coverage picture, start with our Texas windstorm insurance guide.
What Is a WPI-8 Certificate?
The short answer: official proof that a structure — or specific work on it — was built to the coastal windstorm building code.
The WPI-8 is a windstorm certificate of compliance, issued through the Texas Department of Insurance's Windstorm Inspection Program. It documents that construction in the designated coastal territory meets the applicable windstorm building code — the standards designed so structures can withstand hurricane-force wind. The requirement lives in Texas Insurance Code §2210.2515.
There are three versions you'll encounter, and the distinction matters:
| Certificate | Issued by | Covers |
|---|---|---|
| WPI-8 | TDI | Ongoing construction — applied for before work begins, inspected during construction |
| WPI-8-E | TDI | Completed construction — certified after the fact by a Texas-licensed engineer |
| WPI-8-C | TWIA (2017–2020) | Completed improvements certified through TWIA between Jan 2017 and May 2020 — still valid |
Per TDI and TWIA. Since June 1, 2020, all new certificates of compliance are issued by TDI.
One point of frequent confusion: since June 1, 2020, TDI issues all certificates. The WPI-8-C was a TWIA-issued option for a window of about three and a half years; existing WPI-8-Cs remain valid, but new certification — ongoing or completed — now runs through TDI.
Who Needs a WPI-8 — and for What Kind of Work?
The short answer: structures in the designated territory built, altered, remodeled, enlarged, or repaired on or after January 1, 1988.
The requirement attaches to far more than new homes. Certification is generally needed for windstorm coverage eligibility through TWIA when a structure — or work on it — dates from January 1, 1988 onward in the designated coastal territory (the 14 first-tier counties, including Brazoria and Galveston, plus parts of Harris County east of Highway 146). Common improvements that need certification include:
- Roof replacements — the one that catches the most homeowners, because roofs get replaced often on the coast
- Room additions and enlargements
- Window and exterior door installations
- Structural repairs and modifications
Not everything requires certification — TDI publishes a list of improvements that don't — but the safe operating assumption on the coast is that structural and exterior work needs a certificate until confirmed otherwise. An uncertified improvement on an otherwise certified home can complicate windstorm coverage for the property, which is why this comes up so often at exactly the wrong moments: during a coverage application, or during a home sale.
How Do You Check Whether Your Home Already Has One?
The short answer: two online lookups — TDI's database for WPI-8 and WPI-8-E, TWIA's tool for 2017–2020 WPI-8-Cs.
Before starting any certification process, check what's already on file:
- TDI's Windstorm Certificate of Compliance database at tdi.texas.gov/wind — searches WPI-8 and WPI-8-E certificates by property address.
- TWIA's certificate lookup tool at twia.org — covers WPI-8-Cs issued between January 2017 and May 2020, which aren't in TDI's database.
Run the address through both lookups, and ask the seller for copies of windstorm certificates as part of your document request — for the original construction and for any roof replacement, addition, or major repair since 1988. Ten minutes of checking before closing beats discovering a certification gap when you apply for windstorm coverage on a home you already own.
How Do You Get Certified for Ongoing Work?
The short answer: apply through TDI before construction begins, then get inspected at the right stages while the work is underway.
For new construction and upcoming improvements, the sequence is the whole game, per TDI:
- Apply before work starts. State law requires the application — submitted through TDI's online Windstorm system — before construction begins. (Local building permits are separate; those run through your city or county.)
- Inspect during construction. A TDI-appointed qualified inspector or appointed engineer inspects the work at the appropriate stages — for a roof, typically while it's in progress, before the finished layers cover what the inspector needs to see.
- TDI issues the certificate once the work passes and documentation is submitted.
The homeowner's job in all of this is mostly one conversation, had early: ask your contractor, before the contract is signed, how windstorm certification will be handled — who's applying, who's inspecting, and when. On the coast, a contractor who doesn't have a ready answer to that question is telling you something.
How Do You Certify Work That's Already Finished?
The short answer: a Texas-licensed professional engineer inspects the completed work, and TDI issues a WPI-8-E.
Finished work without a certificate isn't a dead end. TDI's completed-construction process, per TDI: any professional engineer licensed by the Texas Board of Professional Engineers and Land Surveyors can inspect completed construction. The engineer submits a signed WPI-2E application along with a sealed post-construction inspection report and supporting documentation (or a sealed design), and TDI issues the WPI-8-E. TDI notes it usually processes submitted forms within about 48 hours, though high volume after a disaster can slow things down.
The honest caveat: after-the-fact certification is generally more involved than certifying as you build, because the engineer has to verify compliance on work that's already closed up. It's a genuinely useful path — especially for home purchases and inherited certification gaps — but it's the fallback, not the plan. If you have the choice, certify during construction.
What If Your Home Is Missing a Certificate?
The short answer: you have options — engineer certification, limited statutory exceptions, and a specific path for non-renewed properties.
A missing certificate complicates TWIA eligibility, but "complicated" isn't "impossible." The realistic paths:
- Certify the completed work. The WPI-8-E process above exists precisely for this — an engineer inspects what's built and TDI certifies it if it complies.
- Limited statutory exceptions. The Insurance Code contains narrow alternative-eligibility paths, including for certain older homes, some involving premium surcharges. These are genuinely limited — confirm your specific situation with TWIA rather than assuming you qualify.
- The non-renewal path. Per TWIA, residential properties insured on or after June 19, 2009 by a private-market insurer, then non-renewed or cancelled while missing a required WPI-8, may be eligible for TWIA coverage. If a private insurer just dropped your coastal home, this is worth knowing before you panic.
Which path fits depends on when the work was done, what kind of work it was, and your insurance history — exactly the kind of tangle worth walking through with someone who handles it regularly rather than untangling alone.
The Certificate Checklist for Buying or Renovating
The short answer: verify before closing, plan before building.
If you're buying a coastal home:
- Search the address in TDI's database and TWIA's WPI-8-C lookup
- Request certificate copies from the seller — original construction and every improvement since 1988
- Flag any uncertified roof replacement or addition before closing, while it's still the seller's problem to help solve
- Line up your windstorm coverage early; our coastal home insurance guide covers the full three-policy picture
If you're renovating or re-roofing:
- Ask the contractor how certification will be handled — before signing
- Confirm the TDI application goes in before work starts
- Keep copies of the certificate with your insurance records when it's issued
- Tell your agent — improvements can affect your coverage needs beyond the certificate itself
The Bottom Line on the WPI-8 Certificate
Here's the whole thing in a few sentences. The WPI-8 is proof that a structure or improvement in the designated coastal territory was built to the windstorm building code — and it's generally required for TWIA eligibility on anything constructed, altered, remodeled, enlarged, or repaired since January 1, 1988, including roof replacements and additions. Since June 1, 2020, TDI issues all certificates: the WPI-8 for ongoing work, where the application must go in before construction starts, and the WPI-8-E for completed work, certified after the fact by any Texas-licensed professional engineer. The WPI-8-Cs that TWIA issued from 2017 to 2020 remain valid. Check TDI's database and TWIA's lookup tool before assuming anything — and if a certificate is missing, there are real paths forward, from engineer certification to limited statutory exceptions.
If you're staring at a certificate question right now — buying a home with a murky renovation history, planning a re-roof, or facing a windstorm application that hit a snag — that's a conversation we have every week from right here in the windstorm territory. We'll help you figure out what's on file, what's missing, and which path gets your coverage in place. Free, no obligation.
Frequently Asked Questions
A WPI-8 is a windstorm certificate of compliance — official documentation that a structure, or specific work on it, was built to the windstorm building code that applies in the designated Texas coastal territory. It's issued by the Texas Department of Insurance through its Windstorm Inspection Program, and it's generally required for windstorm coverage eligibility through TWIA on structures constructed, altered, remodeled, enlarged, or repaired on or after January 1, 1988. There are three related forms: the WPI-8 for ongoing construction, the WPI-8-E for completed construction, and the WPI-8-C, which TWIA issued between 2017 and 2020 and which remains valid.
Generally yes, for structures built, altered, remodeled, enlarged, or repaired on or after January 1, 1988 in the designated coastal territory — certification is one of TWIA's core eligibility requirements, alongside location in the territory and a declination from at least one authorized insurer. There are limited exceptions in the Insurance Code, including paths for certain older homes and for properties non-renewed by a private insurer while missing a certificate, some involving premium surcharges — so if your home is missing certification, confirm your specific options with TWIA or a licensed agent rather than assuming coverage is out of reach.
The Texas Department of Insurance maintains an online Windstorm Certificate of Compliance database at tdi.texas.gov/wind where you can search for WPI-8 and WPI-8-E certificates by property address. For WPI-8-C certificates — the ones TWIA issued between January 2017 and May 2020 — TWIA maintains a separate lookup tool at twia.org, since those records aren't in TDI's database. If you're buying a coastal home, running the address through both lookups before closing, and asking the seller for certificate copies, is one of the most valuable ten-minute checks in the transaction.
For ongoing work, the sequence matters: an application is submitted through TDI's online Windstorm system before construction begins, and the work is inspected at the right stages by a TDI-appointed qualified inspector or appointed engineer — for a roof, typically while the work is in progress rather than after it's covered up. Once the work passes inspection and documentation is submitted, TDI issues the certificate. The practical takeaway: confirm the windstorm certification plan with your contractor before work starts, because certifying as you go is far simpler than certifying after the fact.
Yes. Work that's already finished can be certified through TDI's completed-construction process: a Texas-licensed professional engineer inspects the completed work, and a signed application with a sealed post-construction inspection report or sealed design is submitted to TDI, which then issues a WPI-8-E. TDI notes it usually processes submitted forms within about 48 hours, though volume after a disaster can slow that down. After-the-fact certification is generally more involved than inspecting work in progress — which is exactly why the before-you-build path is preferable when you have the choice.
Stuck on a Certificate Question?
Buying a home with a murky renovation history, planning a re-roof, or hitting a snag on a windstorm application? We help homeowners sort out certificate status and coverage paths every week. Free, no obligation.
✓ Last reviewed by the Granados Insurance Agency team on . We refresh our guides quarterly — TDI's certification process and requirements change.
This guide is general information, not coverage, engineering, or legal advice. Certification requirements, processes, processing times, exceptions, and eligibility rules are drawn from the Texas Department of Insurance and TWIA as cited and can change; whether specific work requires certification, and which path applies to your property, depends on your project's details. Nothing here guarantees certification, eligibility, or coverage for any property. Always verify current requirements with TDI (tdi.texas.gov/wind) and TWIA (twia.org), and confirm your coverage options with a licensed agent or insurer.
Written and reviewed by the Granados Insurance Agency team — licensed Texas insurance professionals based at 9639 Scarsdale Blvd, Ste 101, Pearland, TX, inside the designated windstorm territory. Program details here are drawn from the named sources cited above — the Texas Department of Insurance Windstorm Inspection Program and the Texas Windstorm Insurance Association — and reviewed quarterly. Certification requirements are project-specific; confirm yours with TDI. TX license #[insert].