San Antonio Roof Repair After Storms and Years of Sun
A good repair fixes the cause, not the stain. In San Antonio that cause is often an old hail hit that finally opened up, or a seal the sun wore out.
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The day you find a leak
Contain the water
Put a bucket under it and pull furniture and electronics out of the way. Stay off a wet roof.
Photograph it
Inside and out, before cleanup, with the date written down.
Check the attic
If you can get there safely, look for wet insulation or dark decking near the stain and note where it is.
Book an inspection
We trace where water enters the roof, which is rarely right above the stain.
Get the fix in writing
Photos, the cause and a written price before work starts. If it cannot wait, see emergency roof repair.
Old hail hits that leak years later
NOAA's Storm Prediction Center logged 136 hail reports within 10 miles of San Antonio from 2015 through 2024. Golf ball size hail or larger showed up in four of those years: 2016, 2020, 2021 and 2024. A shingle that lost its granules to a hit in 2020 has spent every summer since baking without protection. When it finally cracks through, the leak looks new, but the cause is old.
That is why we look for hail marks on every repair call, not only after a storm. More on that on our hail damage roof repair page.
Age adds its own failures. Rubber pipe boots, sealant at flashing joints and the adhesive strips under shingle tabs all dry out over time. On a roof that is already a few decades old, these small failures stack up, so a single stain can have more than one cause. We look for all of them before quoting.
Repairs by roof type
Asphalt shingle
Damaged shingles, failed seal strips, ridge caps and vent boots.
Tile
Cracked or slipped tiles replaced, and the underlayment checked beneath them.
Metal
Backed-out fasteners, open seams and dented trim. See metal roofing.
Flat and low-slope
Patches and seam repairs over porches, additions and garages. See flat roof repair.
A repair makes sense when
The problem sits in one area, like a valley, chimney or vent
The shingles around the damage are still flexible
The decking under the leak is still firm
The roof has years of rated life left
Storm damage is limited to one or two slopes
Water has not spread beyond a single ceiling stain
Repairs on older and rental homes
Half of the homes in San Antonio were built before 1985, per the U.S. Census Bureau's American Community Survey 2020-2024. On a roof that has been patched before, we check whether another repair will hold. If it will not, we say so and quote a roof replacement in San Antonio next to the repair price.
About 48 percent of homes in the city are renter occupied. For landlords, a fixed repair now usually beats a tenant's call about a wet ceiling later. GemSco is family owned, licensed and insured. See our full roof repair service and our San Antonio roofing page.
Frequently Asked Questions
Can you repair a tile roof without breaking more tiles?
Tile has to be walked carefully, and some breakage risk comes with any tile work. We step on load-bearing points, lift tiles to reach the underlayment and replace cracked pieces with matching tile where it is available. If matching tile is hard to find, we tell you before work starts and go over the options.
Why did my roof start leaking when there was no storm?
Many leaks come from slow wear rather than one event. Sealant and rubber boots dry out in the heat, flashing loosens as the house moves, and old hail damage finally breaks through. A leak like that often shows up in the first heavy rain after a long dry spell. The inspection finds which of these it is.
Do you give a written price before starting a repair?
Yes. Estimates are free, and every repair comes with photos of the problem and a written price before any work begins. If we find something larger, such as soft decking, the estimate says so and includes the photos, so you can decide with the full picture in front of you.
We’re Here to Help!
GemSco Roofing & Solar serves Houston, DFW, Austin, San Antonio and surrounding areas. We’re family owned and fully licensed and insured.