Commercial Roof Repair and Replacement in South Houston, TX
Flat roofs on shops, offices and warehouses fail in quiet ways. Here is what to watch for and how to plan work without shutting down your business.
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Recent hail and older buildings
NOAA's Storm Prediction Center logged 32 hail reports within 10 miles of South Houston from 2015 through 2024, and 7 of them measured 1.75 inches or more. The largest was 2 inches, on June 23, 2023. On a low-slope roof, stones that size can puncture membranes, crack older surfaces and crush the insulation underneath. The roof may look fine while water slowly works its way in.
South Houston sits mainly in Harris County, where heavy rain is routine. Many commercial buildings here are older, like the housing around them, and their roofs may have been recovered more than once. Each layer hides what is below, which is why a moisture check matters before choosing a fix.
Inspecting a commercial roof
Interior first
Mark every stain, drip and damp ceiling tile so the roof work can be matched to them.
Surface walk
Seams, flashing, rooftop units, drains and scuppers are checked for damage and wear.
Look for ponding
Water that sits after rain points to clogged drains or a sagging deck. See flat roof drainage systems.
Check for trapped moisture
Wet insulation is the hidden cost on flat roofs and decides between repair and replacement.
Written report
Photos and a clear scope of what needs work.
Common low-slope roof systems
TPO
White, heat-welded single-ply sheets common on newer buildings.
EPDM
Black rubber membrane, glued or taped at seams. Compare them in TPO vs. EPDM roofing.
Modified bitumen
Layered asphalt rolls, durable and easy to patch.
Built-up roofs
Older multi-layer asphalt and gravel systems, still found on many older buildings.
Metal
Panels on warehouses and shops, with fasteners that loosen over time.
Repair, restore or replace
Most commercial roof decisions fall into three choices. A repair closes failed seams, patches punctures and reflashes rooftop units on a roof that is still dry. Restoration adds life to a sound roof, for example with a coating over a clean, dry surface. Replacement tears off the old system when wet insulation is widespread or the deck is failing.
The choice depends less on the age of the roof than on how much water is inside it. That is why a moisture check comes before any recommendation. A coating over wet insulation seals the water in, and a full tear-off on a roof that only needs seam work spends money you did not need to spend. Ask any contractor to show you the evidence behind the scope.
Ways to keep the business running during work
Work in sections so most of the building stays open.
Schedule noisy steps outside peak hours.
Keep entrances, parking and delivery areas clear.
Protect equipment and inventory under work areas.
Agree on daily cleanup so debris does not reach customers.
Read how to reduce business disruption during roof repairs for more.
GemSco commercial roofing
GemSco works on residential and commercial roofs, including low-slope and flat systems, as well as metal and shingle roofs on commercial buildings. We are fully licensed and insured, with 20+ years of experience. Estimates are free and financing is available. Visit our commercial roofing page or see our services in South Houston.
Frequently Asked Questions
How do I know if my building's roof needs replacing or just repair?
The main question is how much water is trapped inside the roof. A dry roof with a few failed seams can be repaired. Wet insulation over large areas usually means replacement. Our guide to signs a commercial roof needs replacement lists the warning signs to watch for.
Can a new commercial roof go over the old one?
Sometimes a recover is possible if the existing roof is dry and there is only one layer. Many older buildings already have more than one, and covering wet insulation traps the moisture. A moisture check and a look at the existing layers decide whether a recover is an option.
What maintenance does a flat roof need?
Clear drains and scuppers, check seams and flashing, and look for damage after storms, ideally in spring and fall. Keep records of each visit. A simple commercial roof maintenance plan catches small problems before they turn into leaks over your equipment or inventory.
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