Denton Commercial Roofing: Flat Roofs Under Frequent Hail
For a business in Denton, the roof protects inventory, equipment and daily operations. Hail makes flat roofs a closer-watch item here.
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Common commercial roof systems
Single-ply membranes
TPO and EPDM sheets with welded or sealed seams. See TPO vs. EPDM roofing.
Modified bitumen and built-up
Layered systems that resist foot traffic around rooftop units.
Metal
Panel roofs on warehouses, shops and offices, low-slope or pitched. Fasteners and seams need regular checks after storms.
Low-slope shingle
Some smaller commercial buildings use shingle systems on their steeper sections.
Denton hail and flat roofs
NOAA's Storm Prediction Center logged 114 hail reports within 10 miles of Denton from 2015 through 2024. Thirty-eight were 1.75 inches or larger, and the largest, 4.25 inches, fell on March 26, 2017. Large hail was reported in 8 of those 10 years.
On a flat roof, hail can puncture a membrane, crush the insulation board under it or split seams. Metal panels dent and fasteners can loosen. These problems rarely show from the parking lot. Water may travel under the membrane before it reaches a ceiling tile, so the leak inside is often far from the damage on top. For buildings in Denton County, a check after every large storm is part of normal upkeep.
From survey to repair
Roof walk
Drains, seams, edges and penetrations are checked, with photos of every issue.
Moisture check
Soft areas and interior stains show where water has reached the insulation.
Options in writing
Targeted repair, a recover where it fits, or full replacement, laid out in a written estimate.
Work plan
Access, staging and noisy work are planned around business hours where possible.
Upkeep that adds years to a flat roof
Clear drains and scuppers before and after storm season. See flat roof drainage systems.
Check membrane seams and flashing around rooftop units twice a year.
Keep foot traffic to walk pads around equipment.
Remove debris and branches before they block water or tear the membrane.
Log every inspection and repair with photos.
Walk the roof after any storm with large hail, even if nothing leaks inside.
Watch for ponding that is still there two days after rain, a sign of sagging deck or blocked drains.
Why flat roofs need a different approach
A pitched roof sheds water within seconds. A flat roof relies on a slight slope, drains and scuppers, so water sits on it longer after every storm. When a drain clogs or the deck sags, ponding water stresses seams and finds any weak spot. That is why commercial roofs need planned upkeep instead of waiting for a leak. A clogged drain found during a routine visit costs little to clear. The same drain found after a week of rain can mean wet insulation across a whole section. Our commercial roof maintenance plan guide lays out a simple schedule.
Planning a replacement
When repairs keep piling up, a replacement may cost less over time than another round of patches. Our article on signs a commercial roof needs replacement covers the warning signs. GemSco handles residential and commercial roofing, is fully licensed and insured, and has 20+ years of experience. Learn more about our commercial roofing service or our work in Denton.
Frequently Asked Questions
How do I know if hail damaged my building's flat roof?
Look for dents on rooftop units, vents and metal edges, which show the hail size. Damage to the membrane itself is harder to spot and often needs a close walk of the roof. Leaks may show up away from the damage, so an inspection after large hail is the safest approach.
Can a commercial roof be repaired instead of replaced?
Often, yes, when the damage is limited and the insulation underneath is dry. Repairs can cover seams, flashing and punctures. When wet insulation spreads across large areas, a replacement or recover is usually the better choice. A survey with photos shows which applies to your building.
Do you work with property managers?
Yes. Property managers and owners get the same photos and written estimate, which makes it easier to share findings with a board, a tenant or an insurer. Read how to reduce business disruption during roof repairs for ways to plan work around operations.
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