Why this matters on the Texas coast
Corpus Christi and the towns around the bay sit in the part of Texas the state calls the designated catastrophe area. Private insurers often limit wind and hail coverage here, so many building owners rely on TWIA, the state's insurer of last resort for wind and hail on the coast.
TWIA does not just take the owner's word that a roof was built right. It looks for proof, and that proof is the WPI-8 certificate issued by the Texas Department of Insurance. TWIA's own guidance says a property that needed certification and does not have it may be considered ineligible for coverage. For a commercial owner, that can mean trouble insuring a building for the one risk the coast is known for.
What work needs a windstorm inspection
According to TWIA, replacing a roof needs certification, and so does repairing a significant portion of a roof. Small fixes, gutters and temporary repairs after a storm do not. Painting, plumbing and electrical work do not either.
In practice, nearly every re-roof, tear-off or roof-over on a Coastal Bend commercial building falls into the inspected category. If you are unsure about a repair, ask before the work starts, not after.
How the process works, step by step
1. Plan the roof to the windstorm code. The roof system, deck attachment, insulation fastening, edge metal and flashings all have to meet the wind requirements for the building's location and height. Edge metal and perimeter securement matter most, because that is where wind starts to peel a roof.
2. A Texas-appointed engineer inspects the work. TDI keeps a list of appointed qualified inspectors. They inspect the work while it is being done, so the parts that get covered up, like fastening patterns, can be checked.
3. TDI issues the WPI-8. Once the inspection shows the roof meets code, the certificate is issued and can be found in TDI's online certificate search. Keep a copy with your building records and give one to your insurance agent.
Mistakes that cost Coastal Bend owners money
- Hiring a roofer who has never worked through windstorm inspections, then finding out at the end that nothing was documented.
- Letting a roof get covered up before the inspector sees the fastening, which can mean tearing back finished work.
- Assuming a coating or roof-over does not count. Ask first.
- Losing track of the certificate. Without it, renewing or changing a TWIA policy gets harder.
How Nelson Roof Contracting handles it
Nelson Roof Contracting brings over 50 years of hands-on roofing experience to Corpus Christi building owners, from our office at 5233 IH 37. Every job is supervised, and we build single-ply TPO, PVC and EPDM roofs with the coastal wind code in mind from the first day: perimeter securement, edge metal rated for the wind zone, and fastening laid out so the inspector can verify it.
Before your project starts, we will walk you through what will be inspected and when, so the WPI-8 is part of the plan, not an afterthought.