TWIA Windstorm Insurance Appraisal

When Coastal Wind Losses Occur — and What Actually Gets Argued

Atlantic hurricane season runs June 1 through November 30, and the heaviest TWIA-related loss activity clusters in the August–October window when named systems make landfall along the Texas coast. But the coast also produces year-round wind loss that has nothing to do with a named storm: spring and early-summer squall lines and severe thunderstorms drive hail and straight-line gusts across the Coastal Bend and Rio Grande Valley, and cold-front frontal passages generate sustained onshore wind through the winter. The damage signature differs by season, and so does the argument. Named-storm files turn on the wind-versus-surge allocation described above; convective-season files more often turn on whether roof-surface bruising and mat fracturing are storm-created or pre-existing, and on the age and condition of coastal roofing exposed to constant salt air and UV.

The physical damage most often evaluated on coastal files is concentrated at the building envelope: uplift and blow-off of roof coverings, ridge and hip failures, soffit and fascia separation, window and door breach at the openings, and the resulting wind-driven rain intrusion that tracks from the point of failure inward. Documenting where water entered — and proving it entered above, not from below — is frequently the pivot of the whole file.

The Order an Appraisal Runs On a TWIA File

Appraisal is invoked, not filed. If your policy contains an appraisal provision and the two sides disagree on the amount of loss, either party names its own appraiser in writing. Each appraiser then independently inspects, measures, and prepares a scope and Xactimate estimate. The two appraisers confer to agree on a neutral umpire; where they cannot agree, TDI appoints one from its roster under the statute referenced earlier on this page. Only the specific line items the two appraisers still dispute are submitted to the umpire — anything they already agree on is set. An award signed by any two of the three panel members sets the amount of loss.

The documents that carry the most weight are the ones assembled before the panel convenes: dated pre-loss and post-loss photographs, the original roof and building specifications, prior inspection or maintenance records, any WPI-8 certificate on file for the structure, moisture readings, and independent weather data placing wind speed and direction at the risk on the date of loss. Directional damage patterns and drone imagery are what separate a storm-created loss from ordinary wear, and they are far easier to establish while the damage is fresh.

A realistic timeline on a coastal file is weeks, not days — inspection scheduling after a widespread landfall event competes with thousands of other properties, and post-event coastal pricing has to be verified rather than assumed. Appraisal is still typically faster than litigation, which is one reason coastal wind and hail disagreements are so commonly resolved through it.

Deadlines and the Coverage Boundary — What to Verify Yourself

TWIA claim handling and dispute resolution run on timelines set by Chapter 2210 of the Texas Insurance Code, and those provisions carry strict notice and response deadlines that are easy to miss. Because the statute and TDI rules are periodically amended, check your own policy language and the current TWIA and TDI requirements — or confirm them with counsel — before relying on any specific window. Missing a statutory deadline can foreclose an option that would otherwise be available.

It is worth being precise about what the panel does and does not decide. Appraisal settles the amount of loss only. Whether a given item of damage falls within wind-and-hail coverage — as opposed to the separate NFIP or private flood policy — and whether ordinance-or-law provisions reach the WPI-8 recertification and code-upgrade costs, are coverage questions. Those are determined under the policy by the carrier and, where the parties genuinely disagree, by a court. The appraisers and the umpire do not decide coverage. Keeping that line clear is what lets an independent appraisal produce a documented, defensible number that both sides — and, if it comes to it, a court — can rely on.

To request an appraisal or umpire appointment on a TWIA windstorm file in Galveston, Corpus Christi, South Padre Island, Brownsville, or anywhere in the designated coastal counties, call 972-322-0752.

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Frequently Asked Questions

Can I invoke appraisal on a TWIA windstorm claim?

Usually, but it depends on your specific policy form. TWIA policies have generally included an appraisal provision for disputes over the amount of loss, and where one applies it tends to work like the clause in a Texas homeowners policy: each side names an independent appraiser, the two appraisers select a neutral umpire, and an award signed by any two of the three sets the amount. Confirm the provision and its procedure on your own policy before relying on it.

What differs is the surrounding process. TWIA claim handling is governed by Chapter 2210 of the Texas Insurance Code, which imposes its own notice, acceptance, and dispute deadlines that run independently of the appraisal clause. Those deadlines are strict and unforgiving, so confirm the dates that apply to your specific policy and claim before you rely on appraisal alone.

What does TWIA actually cover?

TWIA is the wind-and-hail insurer of last resort for the Texas seacoast. A TWIA policy covers windstorm and hail damage only.

It does not cover flood or storm surge — that requires a separate NFIP or private flood policy. It also does not cover fire, theft, liability, or most other perils, which stay with your standard homeowners carrier. That split is exactly why so many coastal claims turn into a wind-versus-water argument between two different insurers.

Which counties does TWIA cover?

TWIA writes windstorm and hail coverage in the 14 first-tier coastal counties: Aransas, Brazoria, Calhoun, Cameron, Chambers, Galveston, Jefferson, Kenedy, Kleberg, Matagorda, Nueces, Refugio, San Patricio, and Willacy — plus designated portions of Harris County east of Highway 146.

We appraise TWIA claims throughout that territory, from Galveston and the Bolivar Peninsula down through Corpus Christi and the Coastal Bend to South Padre Island and the Rio Grande Valley.

How is wind damage separated from flood damage?

This is the central dispute in most coastal claims, and it is a documentation problem before it is a legal one.

Wind and surge often strike the same structure within hours of each other, and each is covered by a different policy. We establish the wind loss on its own evidence: directional damage patterns, roof and opening failures, water intrusion paths that begin above the surge line, interior damage inconsistent with rising water, and FAA Part 107 drone imagery that captures the full roof plane. Building a clear, independently supported record of the wind-caused loss is what keeps a covered claim from being under-allocated between the two policies.

What is a WPI-8 certificate and does it affect my claim?

The WPI-8 is a certificate of compliance issued through the Texas Department of Insurance confirming that a structure — or an addition, repair, or roof replacement — was built to the applicable windstorm building code and inspected accordingly.

It can matter at two moments: obtaining or maintaining TWIA coverage, and rebuilding after a loss. Where repairs to a damaged coastal structure trigger current code requirements and inspection, those code-driven costs can be a real part of what a compliant repair costs — but whether they are recoverable depends on your policy's ordinance-or-law coverage and its limits, and on how thoroughly the required work is documented. WPI-8 requirements themselves turn on the structure, the work performed, and when it was done, so treat this as a question to confirm for your specific property.

What does a TWIA appraisal cost?

You pay for your own appraiser and the insurer pays for theirs. If the two cannot agree and an umpire is needed — roughly 5% of files — that cost is split equally.

Typical appraiser fees run $1,000 to $5,000 depending on property size and claim complexity, against $20,000 to $50,000 or more for litigation. Most disputes resolve between the two party appraisers in 90 to 120 days.

When should I consider appraisal for a TWIA windstorm claim?

Consider appraisal when TWIA and the policyholder disagree about the amount of a covered windstorm loss and the applicable policy provides an appraisal process. Appraisal does not decide whether damage is covered. Because TWIA policies and Texas law may impose separate procedures and deadlines, review the claim decision and policy promptly, and confirm the requirements that apply before sending a demand.