WPI-8 Windstorm Certification for Your Roof: A Pearland Homeowner's Guide

If you live in Pearland, Friendswood, League City, or the coastal side of Harris County, your roof does more than keep the rain out. It is also a big part of whether your home can get windstorm coverage at all.

Many homeowners along the coast cannot buy wind and hail coverage from a private insurer. For them, the Texas Windstorm Insurance Association (TWIA) is the backstop. TWIA requires that most homes be certified as meeting the windstorm building code, and a roof replacement is one of the most common reasons a new certificate is needed.

The paperwork is less confusing than it looks. Below: what the catastrophe area is, what WPI-8 and WPI-8-E mean, when roof work needs an inspection, and how the process works when you hire a roofer for a roof replacement.

TWIA calls its coverage area the "designated catastrophe area." It is the part of the Texas coast where the state has found that wind and hail insurance is not reasonably available on the private market.

According to TWIA, the area currently includes:

• All 14 first tier coastal counties, including Brazoria and Galveston counties
• Parts of Harris County east of State Highway 146 (TWIA lists areas such as La Porte, Morgan's Point, Pasadena, Seabrook, and Shore Acres when inside city limits and east of 146)

For our neighbors, that breaks down like this:

County lines and city limits do not always match, so confirm your exact address with the Texas Department of Insurance (TDI) or your insurance agent before you assume either way. If you are in the Pearland area and not sure where you fall, our Pearland roofing page covers the local details.

Both forms are certificates of compliance issued by TDI. The difference is timing.

• WPI-8: For new and ongoing work. A TDI-appointed Texas licensed professional engineer or a TDI windstorm inspector inspects the work while it is being done.
• WPI-8-E: For completed work. A Texas licensed professional engineer evaluates the finished structure after the fact. TDI notes this is harder to do and may cost more.
• WPI-8-C: An older certificate TWIA issued for completed work between 2017 and 2020. You may still see it on older homes.

For a roof replacement, the WPI-8 path is the one you want. The inspector can see things like deck attachment and fastening before the new roof covers them up. Once shingles or metal panels are on, verifying what is underneath gets much harder.

Buying a home in Pearland, League City, or Alvin? Ask the seller for the most recent windstorm certificate on the roof, and check it against TDI's online certificate search. If the roof looks newer than the certificate on file, that is a good question to raise before closing.

Not every roof job triggers a windstorm inspection. Based on TDI and TWIA guidance:

• Generally needs an inspection: Replacing a roof, or repairing a significant portion of it.
• Generally does not: Roof repairs under 100 square feet that do not involve the decking, gutter repair or replacement, and temporary repairs after a storm (like tarping).

A "square" in roofing is 100 square feet, so the TDI cutoff is roughly one square of repair without touching the deck. A small roof repair to fix a few blown-off shingles usually falls under that line. A full tear-off and re-deck does not.

After a hurricane or tropical storm, the sequence counts. A tarp or emergency patch to stop water from getting in is a temporary repair and generally does not need certification. The permanent repair or replacement that follows is a different story. If that permanent work is a significant portion of the roof, plan for the inspection before the crew shows up, even if the insurance claim is still being worked out.

When in doubt, ask before work starts. It is easy to schedule an inspection up front and very hard to fix a missed one later.

Skipping the windstorm inspection might save a few days on paper. It can cost you far more later.

TWIA eligibility. TWIA says coastal properties must be certified as meeting the windstorm code in their area. Without a certificate, a home may be considered uninsurable by TWIA. If you rely on TWIA for wind and hail coverage, that is a serious gap during hurricane season, which runs June 1 to November 30.

Resale. Buyers, their agents, and their insurers in the catastrophe area often ask whether the roof has a current certificate. A missing one can slow a closing or become a negotiating point.

Fixing it after the fact. If the work was never inspected, the fallback is usually a WPI-8-E from an engineer evaluating the finished roof. That can mean more cost and sometimes opening up parts of the roof so the engineer can see how it was built.

On a typical roof replacement in the catastrophe area, the steps look like this:

1. Confirm the address. Your roofer and you confirm the home is inside the catastrophe area and that the scope of work needs certification.
2. Choose code-compliant products and methods. The roof system, fasteners, and installation pattern need to meet the windstorm code for your location.
3. Line up the inspector. A TDI-appointed engineer or TDI inspector is scheduled before work starts.
4. Inspect during the job. The inspector checks the work in progress, often around decking and fastening, before it is covered.
5. Certificate issued. Once approved, TDI issues the WPI-8. TDI says certificates are posted on its website and can be looked up online.
6. Keep a copy. Save the certificate with your insurance records and home documents.

At Stone Castle Roofing, we install to the windstorm code and coordinate the required inspection when a project needs one. We are not TDI inspectors ourselves; the inspection is done by a TDI-appointed engineer or TDI inspector, as the program requires. Our job is to build it right and make sure the inspector sees what they need to see.

If your roof was damaged in a storm, the certificate question often comes up alongside the insurance claim. Our guide to hail damage roof insurance claims in Texas covers that side of the process.

Before you sign, ask:

• Is my address in the TWIA catastrophe area, and does this scope of work need a WPI-8?
• Will you schedule the inspection before work starts, or is that on me?
• Which products and fastening methods are you using to meet the windstorm code here?
• Who is the inspector or engineer, and when will they come out?
• Will I get a copy of the WPI-8 when it is issued?
• If the job is small, how do you decide whether it stays under the inspection threshold?

A roofer who works on the coast every day should answer these without hesitation. If you get vague answers, or "we never bother with that," keep looking. Our list of questions to ask a roofer before hiring covers the rest of the vetting process.

Windstorm paperwork is easier when it is planned from day one. Stone Castle Roofing is based in Pearland and works across Brazoria, Galveston, and Harris counties, so we deal with these requirements on a regular basis.

Schedule a free inspection and we will look at your roof, tell you whether the work you need likely calls for a windstorm inspection, and lay out the next steps. You can also contact us online or call (281) 250-1265.