Commercial and Flat Roofs in Jacinto City: Repair, Replace, Maintain
A flat roof hides its problems until water reaches the space below. Here is what owners of commercial buildings in Jacinto City should watch, and how to plan the work.
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Storms and older buildings in Jacinto City
Jacinto City is in Harris County, within the Houston-Pasadena-The Woodlands metro area. NOAA's Storm Prediction Center logged 26 hail reports within 10 miles of the city from 2015 through 2024. Seven of them were 1.75 inches or larger, and the largest was 2 inches on May 9, 2019. Large hail returned in 2023 and 2024.
On a low-slope roof, hail lands straight on the surface. Bigger stones can bruise or puncture the membrane and crush the insulation board below, leaving soft spots that hold water. Buildings in an area where half of the homes date to before 1960 (U.S. Census Bureau, American Community Survey 2020-2024) often have older roofs too, sometimes with several layers stacked over the original.
Heavy rain is the everyday test. A low-slope roof depends on its drains, and one clogged drain can leave a large area under standing water after a single storm. Over time, ponding water breaks down seams and adds weight the structure was not designed to carry for long. Our guide to flat roof drainage systems explains the options.
A practical plan for a commercial roof
Baseline inspection
Walk the roof, photograph every seam, curb and drain, and note wet or soft areas.
Clear the drainage
Clean drains, scuppers and gutters so water leaves the roof after each storm.
Fix the small things
Reseal open seams and repair flashing at curbs and walls before they spread water under the membrane.
Check after storms
After hail or high wind, look again. Damage on a flat roof rarely shows from the ground.
Plan the replacement
When repairs pile up or wet insulation spreads, budget for a new roof instead of ongoing patches.
Keep records
Save photos, invoices and inspection notes in one place. They show the roof's history when you plan a replacement or ask your insurer about storm damage.
Low-slope systems you will hear about
TPO
A white single-ply membrane with heat-welded seams, common on newer low-slope roofs.
EPDM
A rubber membrane, often black, used for decades on flat roofs. Compare both in TPO vs. EPDM roofing.
Modified bitumen
Asphalt-based sheets applied in layers, often seen on older commercial buildings.
Metal
Used on buildings with enough slope for panels to shed water.
Built-up roofs
Layers of felt and asphalt, often topped with gravel, still found on some older buildings.
Signs the roof is costing you money
Leaks show up near HVAC units or along walls after every heavy rain.
Water stands on the roof for days after a storm.
Ceiling tiles stain or sag inside the building.
Blisters, cracks or loose seams appear on the membrane.
Repairs are being made several times a year on the same roof.
Energy bills climb because wet insulation under the membrane no longer does its job.
Working with GemSco
GemSco handles residential and commercial roofing, including low-slope and flat roofs. The company is fully licensed and insured with 20+ years of experience, estimates are free and financing is available. Read our commercial roof maintenance plan guide, learn about our commercial roofing service or see our work in Jacinto City.
Frequently Asked Questions
How do I know if hail damaged my building's flat roof?
Flat roof hail damage is hard to see from the ground and may not leak at first. Look for dents on rooftop units, vents and edge metal. A walk of the roof can find bruises, punctures and soft spots in the insulation. If hail of 1.75 inches or more fell nearby, a check is worth it.
Can a new membrane go over the old roof?
Sometimes, if the existing roof is dry and the structure can carry the extra layer. If the insulation under the old roof is wet, covering it traps moisture and shortens the life of the new roof. Testing for wet areas comes first, and the written estimate should explain the choice.
How do we keep the business open during roof work?
Plan the work in sections, protect the space below and agree on work hours that fit your operation. Talk through deliveries, parking and noise before the start date. Our article on reducing business disruption during roof repairs lists the questions to ask.
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