
Commercial Roofs in Richardson: Low-Slope Care in Hail Country
Offices, retail spaces and small warehouses often sit under flat or low-slope roofs. Those roofs fail differently from a house roof, and they need their own plan.
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Hail and low-slope roofs in Dallas County
Richardson lies mainly in Dallas County. NOAA's Storm Prediction Center logged 150 hail reports within 10 miles of the city from 2015 through 2024, and 41 were 1.75 inches or larger. The largest, 4.25 inches, was reported on April 11, 2016. That is a large share of reports for one city area, and a flat roof has no slope to shed what lands on it.
On a flat roof, hail can bruise the insulation board under the membrane, crack aging seams and dent metal edges and rooftop units. The damage often stays hidden until water spreads under the surface and shows up inside, far from the impact. Rooftop units add risk. Service crews walk the same paths for years, and every curb, pipe and drain is a seam the membrane has to seal around.
Common low-slope systems on the market
TPO and PVC
Single-ply membranes with heat-welded seams, common on newer commercial buildings.
EPDM
A rubber membrane with a long track record on flat roofs. Compare it in TPO vs. EPDM roofing.
Modified bitumen and built-up
Layered systems found on many older buildings.
Metal
Used on warehouses and some retail. Fasteners and seams need regular checks.
Warning signs on a commercial roof
Water still standing on the roof two days after rain.
Blisters, bubbles or splits in the membrane.
Open seams at edges and around rooftop units.
Stained ceiling tiles inside.
Clogged drains or scuppers. See flat roof drainage systems.
Keeping the business running during the work
Inspection and report
We document the roof with photos and give a written estimate. Estimates are free.
Plan around operations
Work areas, access and noisy steps can be scheduled to limit disruption. Read how to reduce business disruption during roof repairs.
Repair or replace
Targeted repairs when the system is sound, full replacement when it is not. Which system fits depends on the building, its use and what is on the roof now.
Set a maintenance routine
Regular checks after storms catch problems early. See a commercial roof maintenance plan.
Budgeting for a commercial roof
Owners who wait for a failure usually pay the most, because the bill then includes wet insulation, interior damage and lost business days. A roof that is inspected on a schedule gives you time to plan repairs and set money aside for a replacement before it becomes urgent.
Keep a simple file for the building: the roof type, when it was installed, every inspection report and every repair with photos. That history helps any contractor give an accurate estimate. It also helps an adjuster after a storm, since it shows what the roof looked like before the hail. Financing is available if the project needs to be spread out.
Working with GemSco
GemSco is family owned, fully licensed and insured, with 20+ years of experience in residential and commercial roofing, including low-slope, flat and metal roofs. Learn more on our commercial roofing page and the one for roofing in Richardson, or call (844) 980-5506. Free estimates come in writing, with photos of the conditions that drive each line item.
Frequently Asked Questions
How often should a flat commercial roof be inspected?
A common practice is to inspect at least twice a year, usually in spring and fall, and again after every major storm. In an area with frequent large hail like Richardson, the post-storm checks matter most. Regular inspections catch clogged drains and open seams before they turn into interior leaks and damaged stock.
Can a commercial roof be repaired instead of replaced?
Often, yes. If the membrane is mostly sound and the insulation underneath is dry, sealing seams, patching punctures and fixing flashing can extend its life. If water has soaked the insulation across large areas, or the membrane has turned brittle, replacement is usually the better long-term choice. Checking for trapped moisture helps decide.
Does hail damage on a flat roof always cause a leak?
Not right away. Hail can crush insulation board or crack the membrane surface without an immediate leak. Over time, foot traffic, heat cycles and standing water widen those weak spots. That is why a documented inspection after a large hail event is worth doing even when the ceiling tiles look clean.
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