League City Roofing The exemption, in TDI's own words
Texas Department of Insurance windstorm rules exist to make sure roofs in Galveston County — League City included — can stand up to the next named storm. But TDI also carves out a narrow exception for small jobs. The rule reads that roof repairs of less than 100 square feet that don't involve decking don't require a windstorm inspection or a WPI-8 filing. That's roughly a 10-by-10 patch — a chimney flashing repair, a small area of blown-off shingles after a summer thunderstorm, a boot replacement around a plumbing vent.
For a League City address, that matters because you're in TWIA's first-tier territory along with Dickinson, Kemah, Clear Lake Shores, Bacliff, San Leon, Santa Fe, and the part of Friendswood south of Clear Creek. For those addresses, knowing when a WPI-8 is required — and when it isn't — saves everyone a call to TDI they didn't need to make.
Why decking is the real tripwire, not the square footage
Square footage looks like the whole rule, but it's only half of it. TWIA's language for a full replacement talks about repairing or replacing a "significant portion of a roof," and the decking clause in the small-repair exemption is what separates a quick shingle patch from a job that needs to be inspected regardless of size. If a repair opens up the decking — the plywood or OSB sheathing underneath the shingles — because of rot, storm puncture, or a leak that's been sitting long enough to soften the wood, the small-repair exemption doesn't apply anymore, even if the visible patch is well under 100 square feet.
That's the detail that trips people up. A homeowner sees a two-foot hole where a limb came through and assumes it's a small job because the shingles alone would take an hour to replace. But once a contractor pulls back the underlayment and finds decking that needs to be cut out and replaced, the repair has crossed into windstorm-inspection territory.
Worked example: a two-story in Victory Lakes
Picture a two-story home in Victory Lakes after a spring thunderstorm. A limb from a neighbor's oak came down on a rear slope, cracking several shingles and denting a short run of ridge cap. The damaged area measures about 60 square feet — under the 100-square-foot line. A roofing contractor pulls the shingles back to check the damage and finds the decking is sound; no soft spots, no daylight through the sheathing. That repair qualifies for the exemption: no WPI-8, no inspection required, just a straightforward patch.
Now change one detail. Suppose that same limb strike had been sitting unnoticed for a few weeks, and water worked its way under the shingles before anyone spotted it. The contractor pulls back the same 60 square feet and finds the plywood underneath has gone soft and needs to be cut out. Same visible footprint, same square footage — but because decking is now part of the repair, the small-repair exemption no longer applies, and the job needs to go through proper windstorm documentation.
How to tell which situation you're in
- Get the damaged area measured, not guessed — square footage is the first filter, and it has to be under 100 square feet to even be in the running for the exemption.
- Ask whether the repair will require opening the decking, or whether it's confined to shingles, underlayment, and flashing.
- If decking is involved, plan for a full windstorm-compliant repair rather than a quick patch, since that's what the rule now requires.
- Keep records — photos, the measured area, and notes on decking condition — in case the property's WPI-8 status is ever questioned later.
- When in doubt, have a contractor familiar with TDI's windstorm program make the call in person rather than guessing from a photo.
This is also where roof and leak repair work and full roof replacement to windstorm code start to overlap — a repair that looked small on the surface can turn into the latter once the decking is exposed, and it's better to know that before the tarp comes off than after.
What this means for League City homeowners
The 100-square-foot exemption is a genuinely useful rule for small, contained damage, and most homeowners will never need to think about WPI-8 paperwork for a single cracked shingle or a loose piece of flashing. But because League City sits in Galveston County's first tier, it's worth having someone who works this area regularly — see roofing in League City by subdivision — take a look before assuming a patch job stays a patch job.
The takeaway: in League City, whether a roof repair needs windstorm inspection comes down to two questions — is it under 100 square feet, and does it touch the decking — and only a hands-on look at the damage can answer the second one honestly.