
Galveston Roof Repair Built for Coastal Weather
On the island, wind and salt air do more harm to roofs than hail. Here is where Galveston roofs fail and how to repair them so they hold.
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What wears out Galveston roofs
Wind uplift
Strong gusts get under shingle edges and break the seal strips. Once a shingle is unsealed, the next storm can tear it off.
Wind-driven rain
Rain pushed sideways can get under flashing and through vents that stay dry in normal storms.
Salt air
Salt speeds up rust on nails, flashing, vents and metal edges, so metal parts can fail before the shingles do.
Sun and humidity
Heat dries out sealants and pipe boots, and damp attics stay wet longer when ventilation is poor.
Galveston homes and the numbers behind repairs
Half of the homes in Galveston were built before 1973 (U.S. Census Bureau, American Community Survey 2020-2024). Most roofs on those houses have been replaced at least once, but the decking, framing and roof edges have had about 53 years of coastal air. Rusted flashing and soft wood around the edges are common finds during a repair.
Hail is the smaller risk here. NOAA's Storm Prediction Center logged only 2 hail reports within 10 miles of Galveston from 2015 through 2024, and the largest, 1.75 inches, came on April 25, 2015. Wind is the force to plan for. Only 46 percent of Galveston homes are owner occupied, so many repair calls come from landlords managing rentals.
A repair that lasts on the coast
Find every loose shingle
After wind, the crew checks for unsealed shingles beyond the ones that are missing. Read can Texas winds lift shingles.
Replace rusted metal
Corroded flashing, vents and drip edge are replaced rather than painted or sealed over.
Check the wood
Soft decking and fascia near the leak are replaced so new nails have solid wood to hold.
Document the work
Photos and a written estimate before work, and photos after.
Windstorm coverage and repairs
All of Galveston County is in the catastrophe area of the Texas Windstorm Insurance Association (TWIA). For homes insured with TWIA, roof work in that area generally needs to be inspected and certified for windstorm standards, which results in a WPI-8 certificate. Ask your insurance agent what your policy requires before a repair starts, so the work counts when you need it.
Coverage itself depends on your policy and the insurer. GemSco inspects the roof, documents the damage with photos and gives a written estimate. See roof insurance claims for more.
When a repair is no longer enough
Shingles blowing off in more than one area after a normal storm.
Rust on most of the metal parts of the roof.
Soft spots across the decking, not just near one leak.
Repeated leaks after each tropical system.
A roof that is near the end of its life. See roof replacement in Galveston.
Daylight visible through the decking from the attic.
Wet insulation spread across more than one rafter bay.
Repairs with GemSco
GemSco is family owned, fully licensed and insured, with 20+ years of experience. We are an elite contractor for Owens Corning and GAF and work on asphalt shingle, metal, tile and flat roofs. Estimates are free. See our roof repair service, emergency roof repair or our Galveston page.
Frequently Asked Questions
Why do shingles keep blowing off my Galveston roof?
Once the seal strip under a shingle breaks, wind can lift and tear it. Older or poorly nailed shingles lose their seal faster. A repair should check the shingles around the missing ones too, since many may already be unsealed and ready to go in the next storm.
Does a roof repair in Galveston need a windstorm certificate?
If your home is insured through TWIA, roof work in the catastrophe area generally needs a windstorm inspection and a WPI-8 certificate. Rules and exceptions can change, so ask your insurance agent before work begins and keep all paperwork from the job.
I rent out my Galveston home. What should I do when a tenant reports a leak?
Act quickly. Ask the tenant for photos and to protect belongings, then schedule an inspection. Water in a rental can damage the tenant's property as well as yours. A written estimate and photos also help you keep records for the property.
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