What Causes Leaks?

If you're dealing with a leaking roof at your commercial facility, you're not alone. Roof leaks are a common issue for property managers and business owners, and they can quickly lead to costly damage if ignored. At American Roofing, we specialize in identifying and fixing commercial roof leaks fast. Most leaks are caused by four main issues, and recognizing the early signs can help you avoid major headaches.

Common Causes of Roof Leaks

Membrane Issues

  • Your roof membrane is designed to protect your facility, but when it becomes compromised, it can open the door to water intrusion. Splits, tears, cracks, and exposed laps are the most common culprits. Open laps are usually due to poor workmanship during installation, while cracks and other damage often occur from aging or faulty materials. These issues should be addressed immediately to prevent further damage.

Drain and Gutter Problems

  • Gutters, drains, and scuppers play a vital role in moving water off your roof. When these elements are clogged, loose, or improperly sealed, water can pool and make its way into your building. We often find leaks around flashing near drains, which is why we secure loose components, tighten connections, and apply high-quality sealants where needed.

Ponding Water

  • Ponding water refers to water that sits on your roof for more than 48 hours after rain. This is usually a sign of a drainage problem. Not only does standing water increase stress on your roof system, but it also speeds up the breakdown of roofing materials. Our team can pinpoint the root cause and recommend drainage solutions to eliminate this risk.

Flashing and Detail Failures

  • Flashings protect the most vulnerable areas of your roof — around vents, HVAC units, skylights, and walls. Over time, flashing can loosen or seals can fail, creating an entry point for water. Routine inspections and seal maintenance are essential for long-term roof performance.​


​Signs of Leaking Roof Early Detection is Key. Watch for These Common Indicators:
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There's a Water Stain

​Ceiling stains, especially around ceiling tiles, often point to ongoing water exposure. If the stains are spreading or running down walls, the problem is likely getting worse.

Dripping Water

If you notice dripping from your roof deck, ceiling, or structural steel, it’s a red flag. Water puddling on the floor away from plumbing should always be checked out.

Odor and Mold

A strange or musty odor can be a sign of hidden leaks inside your walls. Mold thrives in damp conditions, so if you smell something off, it’s worth investigating.

Blistering and Cracking

Blisters look like bubbles forming on your roof's surface. These areas collect water under the membrane, which can lead to leaks if not repaired.

Leaky Skylights

Skylights are a common source of leaks, especially as they age. If water is coming in around one, it’s time to call in a professional roofer for an inspection.

Water Draining from Overflows

Overflow drains are backup systems. If water is pouring from them, your primary drainage system is not functioning correctly and could lead to structural issues.


​Don't Wait — Get Expert Help Today!

If you suspect a roof leak, call American Roofing right away. Our team is trained to find the source fast and provide immediate repair solutions. Protect your property, prevent damage, and keep your business running smoothly.