Commercial Roofing in Lewisville: Flat and Low-Slope Roofs Under Texas Storms
A commercial roof protects inventory, equipment and the people inside. Here is what Lewisville property owners and managers should know about flat roofs, hail and upkeep.
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Storm exposure for Lewisville buildings
Lewisville spans parts of Dallas County and Denton County. NOAA's Storm Prediction Center logged 162 hail reports within 10 miles of the city from 2015 through 2024, and 51 of them were 1.75 inches or larger. The biggest stone measured 4.25 inches on June 11, 2023.
For a flat roof, that matters in a specific way. Hail can puncture or bruise a membrane, crack seams and damage rooftop units and their curbs. On a low-slope roof, water does not run off fast, so a small opening can let in a lot of water before anyone sees a stain.
Rooftop equipment needs its own look after a storm. Fins on condenser coils dent easily, and curbs and pitch pans around units are common leak points. Checking them along with the membrane gives a full picture of the damage.
Common commercial roof systems
TPO and PVC
Single-ply membranes with heat-welded seams, common on low-slope buildings. Compare options in TPO vs. EPDM roofing.
EPDM
A rubber membrane with glued or taped seams, used on many flat roofs.
Metal
Panels that shed water well on low slopes, with fasteners and seams that need regular checks.
Shingle on mixed buildings
Offices and retail with pitched sections may combine shingles with a flat area.
Keeping a flat roof working
Inspect twice a year
Spring and fall, plus after any hail or high wind.
Check seams and penetrations
Most leaks start at seams, curbs, pipes and edges.
Fix small issues fast
A small patch now costs less than wet insulation later.
Keep records
Dated photos and repair notes help with budgeting and with insurance claims.
Signs it may be time to replace
Leaks in several areas at once.
Wet insulation found in core samples or by soft spots underfoot.
Widespread blistering, shrinking or split seams.
Large areas of standing water that remain long after rain.
See more in signs a commercial roof needs replacement.
Repair costs that keep rising year after year on the same roof.
Working with GemSco
GemSco handles residential and commercial roofing, including low-slope and flat roofs, metal and shingle. We are family owned, fully licensed and insured, with 20+ years of experience. We plan around your operations, and our post on reducing business disruption during roof repairs shares how. Learn more about our commercial roofing service.
Planning the roof budget
A commercial roof lasts longer when it is managed, not just repaired when it leaks. A simple plan sets inspection dates, keeps a log of repairs and flags the areas that keep coming back. That log tells you when repairs stop making sense and replacement should go into next year's budget.
Our post on a commercial roof maintenance plan shows what such a plan can include. For owners who also lease space, sharing those records with tenants helps everyone know who handles what when a leak appears.
Frequently Asked Questions
Can hail damage a commercial membrane roof?
Yes. Large hail can bruise the insulation below the membrane, crack aged membranes and damage seams, flashings and rooftop equipment. Damage is not always visible from a quick walk, so a close inspection with photos after a storm is the best way to know.
How long does a commercial roof inspection take?
It depends on the size and access of the roof and how many units and penetrations it has. The inspector walks the field, checks seams, edges, drains and equipment curbs and documents findings with photos and a written report.
Can repairs be done while the business stays open?
In many cases, yes. Work can be phased and scheduled to keep entrances, parking and noisy work away from peak hours. A clear plan agreed in advance helps the crew and your staff work around each other safely.
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