Leak Repairs

How to Find and Fix Common Commercial Roof Leaks Before They Spread

December 1, 2024 7 min read Silver Rock Roofing
Roofer working on commercial roof repair

A small leak can quickly become a major problem if not addressed promptly. Water intrusion damages insulation, rots wood, promotes mold growth, and can destroy equipment and inventory. Learn how to identify and fix common commercial roof leaks before they cause extensive damage.

Most Common Leak Sources in Commercial Roofs

1. Flashing Failures

Flashing is the material used to seal edges, penetrations, and transitions on your roof. It's the #1 source of leaks. Damaged, lifted, or corroded flashing allows water to seep underneath the roofing membrane.

2. Roof Penetrations

HVAC units, vents, pipes, skylights, and other rooftop equipment create penetrations that require sealing. Boot failures, cracked pipe collars, and deteriorated sealant around penetrations are common leak sources.

3. Seam Failures

The seams where roofing membrane sheets overlap are vulnerable to separation, especially after years of thermal cycling. Heat-welded seams can fail, and adhesive seams can lift.

4. Ponding Water

Water that pools on flat roofs for more than 48 hours breaks down roofing materials and finds any weak points. Ponding water is especially damaging during freeze-thaw cycles.

5. Storm Damage

High winds can lift and tear roofing materials. Hail creates punctures and dents. Flying debris can puncture the membrane. Storm damage often goes unnoticed until leaks appear inside.

How to Find the Source of a Leak

Finding the exact source of a commercial roof leak can be challenging because water can travel along beams and decking before appearing inside. Here's how to track it down:

  • Start at the interior stain and work upward to the roof
  • Check all roof penetrations in the area first
  • Inspect flashing around edges, walls, and penetrations
  • Look for signs of ponding water or drainage issues
  • Check seams for separation or deterioration

When to Call a Professional

While minor issues like cracked sealant can sometimes be addressed temporarily, most roof leaks require professional repair. Here's when to call in the experts:

  • Any leak that's appeared inside your building
  • Visible damage to the roofing membrane
  • Multiple leak sources or widespread issues
  • After any significant storm event

Silver Rock Roofing offers comprehensive leak detection and repair services for Atlanta commercial properties. Our experienced technicians can quickly identify the source and provide lasting repairs.

Expert Leak Detection & Repair

Don't let a small leak become a big problem. Get professional help today.