Commercial Roofs in McKinney: Flat, Low-Slope and Steep
A leak in a business means lost days, not just a stain. Here is how to keep a commercial roof in McKinney working through storm season.
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Hail on flat and low-slope roofs in Collin County
NOAA's Storm Prediction Center logged 156 hail reports within 10 miles of McKinney from 2015 through 2024, with 59 at 1.75 inches or larger and a top size of 4.5 inches. On a flat roof, hail hits the whole surface at once. It can puncture or bruise single-ply membranes, crack coatings and dent rooftop units and their curbs.
Low-slope roofs also drain slowly. A small puncture lets water spread under the membrane before it shows inside. Regular checks after storms matter more here than on most steep residential roofs.
Storms that frequent also test the rooftop equipment. HVAC units, vents and skylights each add seams and flashing that hail and wind can loosen. On many buildings the leaks come from those details, not from the open field of the roof.
Common low-slope systems
Single-ply membranes
TPO and EPDM are common on low-slope buildings. Our guide on TPO vs. EPDM roofing compares them.
Metal roofs
Seams, fasteners and panel ends need regular checks to stay tight.
Steep-slope commercial
Shingle, tile and stone-coated roofs on offices, churches and retail buildings.
Drainage
Drains, scuppers and gutters that move water off before it ponds. See flat roof drainage systems.
Warning signs on a commercial roof
Water standing on the roof two days after rain.
Blisters, splits or open seams in the membrane.
Stains on ceiling tiles near walls or rooftop units.
Rust or loose fasteners on metal panels.
Repairs stacked on repairs in the same area.
Ponding near rooftop units after each storm.
Repair, recover or replace
A repair fixes a defined problem: a split seam, a punctured area, a failed flashing detail. It makes sense when the rest of the roof is sound and dry underneath.
A recover adds a new membrane over the existing roof where conditions allow. It depends on the condition of the deck and insulation, which must be dry. Wet insulation traps water and needs to come out.
A full replacement removes the old system down to the deck. It is the right call when damage is widespread or the roof has reached the end of its service life. Our guide on signs a commercial roof needs replacement lists what to watch for, and a commercial roof maintenance plan helps delay that day.
How we handle a commercial job
Call
Tell us the address, building type and what you are seeing. Estimates are free.
Survey
We walk the roof, check drains and seams, and photograph damage.
Options
Repair, recover or replace, with a written estimate for each that applies.
Scheduling
We plan work around your hours where possible. Read how to reduce business disruption during roof repairs.
Follow-up
A maintenance plan keeps small issues small after storm season.
Working with GemSco on a McKinney building
GemSco is family owned, fully licensed and insured, with 20+ years of roofing experience on residential and commercial work. We handle low-slope and flat systems, metal and steep-slope roofs, and storm damage on all of them. If a storm hits the building, we document the roof with photos and provide a written estimate for your insurer and your records. Estimates are free. Learn more on our commercial roofing page.
Frequently Asked Questions
How often should a commercial roof in McKinney be inspected?
Twice a year is a common plan, once before and once after the spring storm season, plus after any large hail. With large hail near McKinney in 7 of the last 10 years, checks after storms are the ones that catch membrane damage before it spreads.
Can a membrane roof be repaired after hail?
Often, yes, when the damage is limited. Punctures and split seams can be patched. If the membrane is bruised across the whole roof or water is trapped in the insulation, replacement or a recover may be the better option. A survey with photos shows which applies.
Do you work on both small and large buildings?
GemSco works on residential and commercial roofs, including low-slope and flat systems. Tell us about the building, the roof type and the issue you are seeing, and we will schedule a free estimate. A survey with photos is the first step on any size of building.
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GemSco Roofing & Solar serves Houston, DFW, Austin, San Antonio and surrounding areas. We’re family owned and fully licensed and insured.