Commercial roofs are built to be durable and long-lasting — but they’re not immune to wear and tear. Whether you manage a warehouse, retail space, or office building, knowing the most common issues that affect flat or low-slope roofs can save you time, money, and headaches down the road.
Here are the most common commercial roof problems, what causes them, and how you can prevent costly repairs.
1. Ponding Water
What it is: Water that collects in puddles on a flat roof and doesn’t drain within 48 hours.
Why it’s a problem:
Ponding water increases the risk of leaks, speeds up membrane deterioration, and can add significant weight to the roof structure.
Prevention tips:
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Ensure proper slope and drainage systems
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Keep drains and gutters clear of debris
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Schedule regular inspections after heavy rain or snow
2. Membrane Damage or Blistering
What it is: Bubbles, cracks, or tears in the roofing membrane caused by trapped moisture, UV exposure, or age.
Why it’s a problem:
Once compromised, the membrane can no longer fully protect the roof from water intrusion.
Prevention tips:
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Have a professional roofing contractor perform annual inspections
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Repair small blisters or tears before they expand
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Consider a protective coating for aging membranes
3. Flashing Failures
What it is: Deterioration or separation of the metal or rubber material that seals roof edges, vents, and HVAC units.
Why it’s a problem:
Flashing is often the first place leaks start, especially after storms or extreme temperature shifts.
Prevention tips:
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Check flashings regularly for signs of lifting or cracking
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Use high-quality materials designed for your roofing system
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Have flashing professionally replaced when it’s failing
4. Poor Installation or Repairs
What it is: Incorrect materials, shortcuts, or lack of expertise during the installation or repair process.
Why it’s a problem:
Improper work can shorten the life of your roof and void the warranty — even if the damage isn’t visible right away.
Prevention tips:
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Hire a licensed, experienced commercial roofing contractor (like us!)
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Ask for references and project portfolios
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Always get a second opinion before authorizing major work
5. Neglected Maintenance
What it is: Letting small issues go unchecked — clogged drains, debris buildup, or loose flashing.
Why it’s a problem:
Minor problems can turn into major repairs if not addressed early.
Prevention tips:
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Set up a regular maintenance schedule
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Conduct visual checks each season
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Document roof conditions for warranty and insurance purposes
🛠️ Pro Tip: Prevention Costs Less Than Repair
The truth is, most commercial roof problems start small. A quick inspection or simple fix today can save you from major water damage, business disruptions, or full roof replacement down the road.
📍 Need Help with Your Commercial Roof?
We specialize in commercial roofing inspections, maintenance, and repairs for flat and low-slope buildings. If you’ve noticed standing water, visible wear, or it’s been over a year since your last inspection, we’re here to help.
👉 Schedule a Free Commercial Roof Inspection
Or call us at 1-866-860-7119 to talk with our local team.