Your commercial roof is one of the hardest-working parts of your building. It shields you from the elements, helps regulate indoor temperatures, and plays a crucial role in energy efficiency. But like anything else, it doesn’t last forever. Small issues can quickly escalate into costly repairs—or even a full roof replacement—if they’re ignored for too long.

At The Duerson Corporation, we’ve seen how catching problems early can save business owners thousands in repairs. Here are seven warning signs that your commercial roof may need some attention.

1. Water Stains or Interior Leaks
If you see brown stains on your ceilings or walls, bubbling paint, or even water dripping inside your building, there’s a good chance your roof is compromised. Even a small leak can lead to mold, structural damage, and costly repairs if left unchecked.

What to Do:
Schedule a roof inspection immediately. Leaks rarely fix themselves, and the longer you wait, the worse they’ll get.

2. Pooling Water on the Roof
Flat commercial roofs are designed to drain water efficiently. If you notice standing water that lingers for more than 48 hours after it rains, your roof isn’t draining properly. This adds extra weight and stress to the roof and increases the risk of leaks and structural damage.

What to Do:
Check for clogged drains and clear out any debris. If ponding water is a recurring problem, you may need to adjust the roof’s slope or drainage system.

3. Bubbling or Blistering in the Roofing Material
Have you noticed spots where your roof looks like it’s bubbling up? This is a sign that moisture is trapped beneath the surface. Over time, this weakens the roofing membrane and can cause cracks, leaks, and further deterioration.

What to Do:
Have a professional assess the damage. In many cases, early intervention can prevent a costly replacement.

4. Cracks, Tears, or Loose Seams
Your roof goes through a lot—temperature changes, strong winds, and general wear and tear. Over time, this can lead to cracks, tears, or loose seams. If these aren’t addressed, water can seep in and start causing damage.

What to Do:
Schedule regular inspections to catch these issues early. Small repairs now can prevent major problems later.

5. Unexpected Spikes in Energy Bills
If your heating and cooling costs have jumped without explanation, your roof might be to blame. A damaged or aging roof can lose its ability to insulate properly, forcing your HVAC system to work harder to maintain a comfortable indoor temperature.

What to Do:
If you’ve noticed a sudden rise in energy costs, it’s worth getting your roof inspected. A well-maintained, energy-efficient roof—like Duro-Last—helps regulate indoor temperatures and keeps costs down.

6. Mold or Mildew Growth
Mold on your ceiling, walls, or even on the exterior of your building can signal excess moisture getting in where it shouldn’t be. Left unchecked, mold and mildew can spread quickly, leading to health concerns and additional structural damage.

What to Do:
Identify and fix the source of the moisture immediately. Mold won’t go away on its own and can cause serious issues if ignored.

7. Your Roof is Just… Old
Even the best roofs don’t last forever. If your commercial roof is more than 15–20 years old, it’s time to keep a closer eye on its condition. Older roofs are more prone to leaks, insulation problems, and structural wear.

What to Do:
If your roof is aging but still in decent shape, regular maintenance can extend its lifespan. But if you’re noticing consistent issues, it might be time to start planning for a replacement.

Don’t Wait Until It’s Too Late

Your roof isn’t something you want to take chances with. Catching small problems early can save you a lot of money and frustration down the road. At The Duerson Corporation, we specialize in installing and maintaining Duro-Last roofing systems—designed for durability, energy efficiency, and long-term performance.

If you’ve noticed any of these warning signs, or if it’s just been a while since your last inspection, reach out to us today. Let’s make sure your roof stays in top shape for years to come.