Commercial Roofing in San Antonio
A commercial roof in San Antonio has to take big hail, long sun and sudden downpours. GemSco repairs and replaces commercial roofs with a written plan owners can budget around.
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Hail risk for San Antonio buildings
NOAA's Storm Prediction Center logged 136 hail reports within 10 miles of San Antonio from 2015 through 2024, and 48 of them were 1.75 inches or larger. On a commercial roof, hail that size can fracture the surface, crack skylights, dent metal panels and damage rooftop equipment.
The problem is visibility. Nobody walks a commercial roof after every storm, and damage on a low-slope surface rarely shows from the ground. A leak months later is often the first sign, and by then water may have soaked the insulation.
Sun, heat and sudden rain
San Antonio summers put a flat roof through a long heating and cooling cycle every day. The surface expands in the afternoon and shrinks at night, and over the years that movement opens seams, cracks the sealant around penetrations and pulls at flashing. Most leaks on older commercial roofs start at one of those joints, not in the open field of the roof.
Drainage is the other weak point. A sudden downpour can overwhelm clogged drains and scuppers, and water left standing finds its way through the smallest gap. Keeping drains clear between inspections is one of the cheapest ways to protect a commercial roof.
What to check on a commercial roof after hail
Roof surface
Fractures, punctures and bruised areas on flat and low-slope roofs.
Skylights
Cracks that let water in and create a fall hazard.
Metal panels and trim
Dents, chipped coatings and loosened fasteners. See metal roofing.
Rooftop units
Dented housings and damaged curbs and flashing around them.
Drains and gutters
Debris and granules that block drainage and cause ponding. See gutter repair.
Edge metal and coping
Loosened by storm winds, letting water and air get under the roof surface.
How we handle a commercial hail inspection
Access
Roof access and timing coordinated with the building manager.
Full-roof survey
Every section photographed, with damage marked by location.
Report
Photos and written findings an owner or insurer can follow.
Options
Repair, section replacement or full replacement, priced in writing. See commercial roof repair and commercial roof replacement.
Records worth keeping for each building
Date of the last roof replacement and the system installed
Photos from the last inspection, section by section
Repair history with dates and locations on the roof
Storm dates and any claims filed
Manufacturer warranty documents
Contact details for the building's insurance agent and carrier
Insurance and planning
Coverage for storm damage depends on the building's policy and the insurer's decision, and GemSco does not promise claim outcomes. We inspect, document with photos and provide a written estimate, which gives owners a clear starting point. Our roof insurance claims page explains how claims generally work.
GemSco is family owned, licensed and insured, and an elite contractor for Owens Corning and GAF. We handle residential and commercial roofing in San Antonio, Houston, DFW and Austin. Estimates are free. For homes in the city, see San Antonio roofing.
Frequently Asked Questions
Should a commercial roof be inspected after every hailstorm?
After any storm that leaves dents on cars, equipment or gutters, yes. Commercial roofs are rarely seen up close, so damage can sit for months. An inspection soon after the storm ties the damage to the date and catches problems before water reaches the insulation. Many policies also set time limits for reporting damage.
Can damaged sections be replaced without redoing the whole roof?
Often, yes. If the damage is concentrated and the rest of the roof is sound, replacing the affected sections can be practical. When damage is spread across the roof or the insulation is wet in many areas, a full replacement usually makes more sense. The inspection report shows exactly where the damage is.
Does GemSco also roof an owner's homes or rentals?
Yes. GemSco handles residential and commercial roofing, so an owner with a commercial building and rental houses can use one contractor for both. Each property gets its own inspection, photos and written estimate, which keeps budgeting simple and makes it easy to compare one roof against another.
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GemSco Roofing & Solar serves Houston, DFW, Austin, San Antonio and surrounding areas. We’re family owned and fully licensed and insured.