Schertz Commercial Roofing: Repair, Replacement and Upkeep
Commercial roofs rarely fail all at once. They fail at seams, drains and edges, one small problem at a time, until water reaches the deck.
Schedule Your Roofing Inspection Today
Fill out the information below and we’ll reach out to complete your estimate as soon as possible!
What fails first on a low-slope roof
Seams that open as the membrane expands and shrinks in the heat.
Flashing at walls, curbs and rooftop units.
Drains and scuppers clogged with leaves and debris.
Edge metal that loosens in high winds.
Penetrations for pipes, conduits and vents added over the years.
Rooftop units whose curbs and flashing were never resealed after service visits.
Weather and buildings in Schertz
NOAA's Storm Prediction Center logged 30 hail reports within 10 miles of Schertz from 2015 through 2024. Only 1 was 1.75 inches or larger, a 2-inch stone on April 12, 2016. That is a lighter large-hail record than many nearby areas, but flat roofs face every storm directly, and smaller hail can still damage aging membranes and rooftop equipment.
Heat may be the bigger daily factor. Low-slope roofs absorb sun all day, and membranes expand and contract with each cycle. Over years, that movement opens seams and pulls at flashing. Schertz spans Comal, Guadalupe and Bexar counties (U.S. Census Bureau), and owners with buildings across the area should treat each roof on its own record.
Drainage keeps everything else working
Standing water is the enemy of a low-slope roof. It adds weight, speeds up membrane wear and finds every weak seam. Most ponding comes from clogged drains, settled insulation or a deck that has sagged over time. Clearing drains and scuppers in spring and fall is the simplest step a building owner can take.
If water still sits for more than a couple of days after rain, the slope may need to be corrected with tapered insulation or added drains. Read flat roof drainage systems for how those options work. Fixing drainage often adds years to a membrane that would otherwise fail early.
Common commercial roof systems
TPO and EPDM
Single-ply membranes widely used on low-slope roofs. Compare them in TPO vs. EPDM roofing.
Modified bitumen
Asphalt-based rolls, often seen on older commercial buildings.
Metal
Common on shops and warehouses, with seams and fasteners that need regular checks. See metal roof maintenance.
Sloped sections
Shingle or tile over offices and entrances on mixed-use buildings.
How a commercial job runs
Survey
We inspect the roof surface, drains, edges and rooftop units and document findings with photos.
Scope
A free estimate in writing separates urgent repairs from planned work.
Schedule
Work is planned to limit disruption to tenants and customers.
Communicate
Tenants and staff get a clear schedule so work areas and entrances are planned ahead. Read reduce business disruption during roof repairs.
When to replace
Repairs make sense when the membrane is sound and the insulation below is dry. When water has spread under large areas, or when leaks keep coming back in new places, replacement is usually the better use of budget. Our article on signs a commercial roof needs replacement lists what to look for.
GemSco is family owned, fully licensed and insured, with 20+ years in residential and commercial roofing. Learn more on our commercial roofing service page or the Schertz roofing page.
Frequently Asked Questions
Does heat really damage a flat roof?
Yes, over time. Low-slope roofs take direct sun for most of the day, and membranes expand and contract with each heat cycle. That movement stresses seams and flashing. Regular checks catch open seams early, before water gets into the insulation below.
How do I find a leak on a large flat roof?
Water can travel a long way under a membrane before it shows inside. The search starts at the interior stain and works outward to nearby seams, drains and penetrations. Photos and a survey of the whole roof help find the real entry point rather than patching the wrong spot.
Can GemSco work on both the flat and sloped parts of a building?
Yes. GemSco works on low-slope and flat roofs as well as asphalt shingle, metal, stone-coated, tile and wood shake. Handling both in one plan keeps the transitions between roof sections, where many leaks start, properly sealed.
More Roofing Help in Schertz
Roofing in Schertz, TX
City overviewRoof Repair in Schertz
Learn MoreRoof Replacement in Schertz
Learn MoreStorm & Hail Damage in Schertz
Learn MoreRoof Inspection in Schertz
Learn MoreGutters in Schertz
Learn MoreSolar Panel Installation in Schertz
Learn MoreSolar Removal & Reinstall in Schertz
Learn MoreCommercial Roofing Near Schertz
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.