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Why is My Roof Leaking?

Two construction workers stand on a rooftop surrounded by tools and roofing materials under a cloudy sky

At SBR Roofing, we understand how disruptive and stressful a leaking roof can be for business owners, landlords, and property managers. When a roof starts to leak, it threatens your property’s safety, integrity, and operational continuity. Here is a clear breakdown of why your roof might be leaking, what to watch for, and how to prevent more serious damage.

Common Causes of Commercial Roof Leaks

Several factors can cause commercial roofs to develop leaks over time. Some of the most common include:

  1. Aging Roofing Systems Roof materials deteriorate with age, especially under the constant sun exposure we experience in LA, Ventura, and Orange Counties. As roofing membranes, flashings, and sealants break down, vulnerabilities develop.
  2. Poor Installation or Workmanship Even a newer system can fail prematurely if a roof is not installed according to manufacturer specifications or industry standards. We often see issues like improperly sealed seams, misaligned membranes, and poorly fastened flashing.
  3. Roof Penetrations HVAC units, vents, drains, and skylights create openings that must be properly sealed. These penetrations are frequent sources of leaks if the flashing around them becomes loose, cracked, or degraded.
  4. Standing Water (Ponding) Flat and low-slope roofs are prone to ponding water if drainage is inadequate. Standing water accelerates membrane wear and can lead to leaks through small cracks or seams.
  5. Weather Damage Southern California’s intense sun, heavy rainstorms, and occasional strong winds can all inflict wear and tear. Over time, these environmental factors cause roof systems to lose flexibility and crack or split.
  6. Clogged or Damaged Drains and Gutters When water can’t properly drain, it backs up onto the roof, increasing the risk of leaks around drains and along the roof perimeter.

Identifying a Leak

Early detection is critical to minimizing damage. Signs that your roof may be leaking include:

  • Water stains on ceilings, walls, or around windows.
  • Dripping water inside the building during or after rain.
  • Visible damage to the roofing membrane or flashing.
  • Mold or mildew growth inside the structure.
  • Sagging sections of ceiling tiles or drywall.

Keep in mind that water often travels along structural components before becoming visible inside the building. The leak’s origin may not be directly above where water appears.

Risks of Ignoring Roof Leaks

Delaying roof repairs creates serious risks, including:

  • Structural Damage: Persistent moisture can rot wood, corrode metal, and weaken concrete.
  • Interior Damage: Flooring, insulation, drywall, and electrical systems are all vulnerable to water damage.
  • Mold and Mildew: Unchecked leaks create an ideal environment for mold growth, which can trigger health issues and costly remediation.
  • Operational Disruption: For businesses, water intrusion can halt operations, damage inventory, and increase liability.
  • Increased Repair Costs: Minor leaks that could have been easily repaired can evolve into major roofing failures requiring expensive replacements.

Preventive Measures

The best defense against roof leaks is a proactive approach:

  1. Schedule Regular Inspections At SBR Roofing, we recommend professional inspections at least twice a year—once before the rainy season and once after. Inspections catch early signs of wear, allowing for small repairs before bigger problems arise.
  2. Maintain Roof Drainage Systems Clean out gutters, scuppers, and drains regularly to prevent water buildup.
  3. Address Minor Repairs Promptly Small cracks, blisters, or seam separations should be repaired immediately to prevent water infiltration.
  4. Document Roof Conditions Maintain detailed records of roof inspections, repairs, and maintenance. This helps track the roof’s condition over time and supports warranty claims if necessary.
  5. Work with Experienced Professionals Not all roofing companies are the same. We have built our reputation on 60 years of consistent quality, thorough work, and long-term value. Working with a proven roofing professional ensures repairs are made correctly the first time.

If you’re seeing signs of a leak or want to ensure your roof stays watertight for years to come, SBR Roofing is ready to help. Our experienced team is committed to protecting your property and providing lasting solutions.

Protect your home with trusted experts—contact SBR Roofing today for reliable roof leak repair.