TWIA explained: who it insures, what a policy covers, and where certificates fit

TWIA is the Texas Windstorm Insurance Association, created by the Legislature in 1971 and governed by Chapter 2210 of the Insurance Code, and it insures coastal property against wind and hail when the private market will not. It covers only property inside the designated catastrophe area, only the perils of wind and hail, and for most structures built or changed since January 1, 1988 it requires a windstorm certificate of compliance before it will write the policy.

254 Engineering is an engineering firm, not an insurance agent, and this page describes the association from its own published pages and the department's. Policy questions belong with a licensed agent or with the association. Where the question is the certificate, the WPI-8 certification page sets out the windstorm work the firm describes and its published prices.

What the association is

The association's overview says it is not a state agency and receives no general revenue. It describes itself as a residual insurer of last resort rather than a competitor to private insurers. The department's own overview of the association, dated June 8, 2026, gives the purpose in a sentence: to provide windstorm and hail coverage to those who are unable to obtain insurance from the voluntary insurance market.

That design explains most of the rules below. An insurer that may decline a building it does not like can underwrite one property at a time. An insurer obliged to take property the market turned down relies on documents instead.

Who can buy a policy

Location comes first. The property has to be in the designated catastrophe area, which the association describes as the entire first tier of fourteen coastal counties and part of Harris County east of Highway 146. On the Coastal Bend that takes in all of Nueces, San Patricio and Aransas counties.

Then a private insurer has to have said no. The department's overview says an applicant must first be declined by at least one licensed insurer that writes windstorm and hail coverage in the first tier coastal counties, and that an offer of a policy that is not substantially equivalent can also count.

Applications go through an agent licensed by the department, with the full annual premium, according to the association. And the property has to be in insurable condition: in good repair, with no unrepaired damage or hazards, which the association says it may verify by an inspection on site or from the air. That last condition matters after a storm, when a house with open damage is not in the condition the association insures.

What a policy covers and what it does not

Wind and hail, and nothing else. The association's overview says no other perils are covered, and the department's COAST program sheet says in terms that the association does not cover storm surge or flood damage, which is administered separately through the National Flood Insurance Program.

The department's overview lists the maximum limits in effect from January 1, 2026:

• Dwellings: $1,773,000.
• Contents of apartments, condominiums or townhouses: $374,000.
• Commercial risks and public buildings: $4,424,000 each.
• Manufactured homes: $119,000.

Residential deductibles are $100, $250 or 1 percent, with optional larger deductibles from 1.5 to 5 percent that carry premium credits. Commercial and public buildings carry a 1 percent deductible per item per occurrence, with optional 2 or 5 percent deductibles. A percentage deductible is a percentage of the amount of insurance, not of the claim, which is worked through on the hurricane damage and insurance page.

The flood requirement

Wind coverage can depend on flood coverage. The department's overview says that for a structure built, altered, remodeled or enlarged on or after September 1, 2009 in certain flood zones V or VE, the applicant must provide evidence of a flood policy if flood insurance is available through the National Flood Insurance Program. It also says the requirement does not apply to repairs.

For a Gulf front property that is the requirement most likely to surprise an owner who thought of the two perils as separate purchases.

Where the windstorm certificate fits

The association's overview says structures built, altered or enlarged on or after January 1, 1988 need a certificate of compliance, a WPI-8, WPI-8-E or WPI-8-C, with limited exceptions, and that certificates the association issued itself remain valid. The department's overview adds that structures built before January 1, 1988 do not need a WPI-8, and the department's general questions page says inspection and certificate data go to the association every night.

The association's certification page names two residential exceptions. A residential property built from 1988 to June 18, 2009 that is not certified may still be eligible, with a 15 percent surcharge on top of the premium. A residential property insured on or after June 19, 2009 that a private insurer nonrenewed or canceled, and that was missing a required certificate at the time, may be eligible.

The statute behind the second exception has conditions that fail quietly, especially the one about work done after the cancellation, and they are read line by line on the TWIA eligibility requirements page. How the 1988 date works for an older house, including the evidence of prior coverage the statute accepts, is on the page about homes built before 1988. What each certificate type is, and which forms produce it, is on the WPI-8 certificate page.

The practical sequence for anyone planning coastal work does not change. File the WPI-1 before the work starts, have it inspected while it is open, and the certificate that results is the document the association asks for. The windstorm certification scope and prices cover ongoing construction and construction already complete.

How the association pays for a large storm

The association's overview describes losses paid in layers. First come its premiums and the Catastrophe Reserve Trust Fund. Then public securities and assessments on member companies in three classes. Then reinsurance or other risk financing, sized to cover at least a 100 year hurricane season. It reports access to $4.3 billion for the 2026 season.

The detail an owner should notice is repayment. The overview says some public securities may be repaid through surcharges on coastal policyholders, so the cost of a large storm can reach policyholders after it has passed as well as before it arrives.

Claims run on the statute's clock

Section 2210.573 of the Insurance Code requires an insured to file a claim under an association policy within one year of the date the damage occurred, subject to section 2210.205(b). The association may ask for missing information within 30 days after the claim is filed, and unless the commissioner extends the period it must give written notice within 60 days of receiving the claim, or of receiving the information it asked for, saying whether it accepts the claim in full, in part, or not at all.

The department's COAST program sheet adds two dates for the policyholder. There are 60 days from receiving the association's notice to request appraisal, and replacement cost documentation is due within 545 days of receiving the claim decision. The department also notes that a claim can be started before the damage has been fully reviewed.

For coastal work that has not been certified yet, the certificate is the condition an owner controls. The windstorm certification page gives the published price for ongoing construction and for construction already complete.