5 Common Commercial Roof Problems (& Long-Lasting Fixes)

Commercial property owners and building managers frequently encounter common commercial roof problems that can disrupt operations, lead to costly repairs, and even endanger the integrity of the entire building. Whether caused by weather, time, or poor workmanship, these issues require immediate attention paired with effective solutions.

This blog dives into the most common issues and provides actionable advice for long-lasting solutions. You’ll learn about:

  • The primary causes of roof leaks and their fixes
  • How to identify problems with roofing materials in time to avoid bigger concerns
  • Ways to prevent poor installation issues from wreaking havoc on your building

Read on to equip yourself with insights that save you time, money, and stress while keeping your building safe and protected.

1. Roof Leaks

Roof leaks are the most frequently encountered issue when it comes to commercial roofing. These leaks can lead to water infiltration, compromising the structural integrity of the building and resulting in additional damage such as mold growth and ruined insulation.

A flat rooftop with multiple HVAC units, ventilation ducts, puddles of water, and scattered plastic crates.

Causes of Roof Leaks

  • Clogged Drains: If your drainage system is blocked by debris, standing water can accumulate on the roof surface, leading to leaks.
  • Faulty Seals: Seals around vents, skylights, or HVAC units can deteriorate over time, allowing water to seep in.
  • Ponding Water: Flat commercial roofs, in particular, are prone to ponding water, which can erode roofing materials over time and cause leaks.

Fixes for Roof Leaks

  • Regular Maintenance: Schedule inspections and ensure drains, gutters, and downspouts remain debris-free.
  • Resealing Flashings: Ensure professionals reseal or replace worn flashing around roof penetrations to create a watertight barrier.
  • Install Tapered Insulation: This can help prevent ponding water by improving drainage on flat roofing surfaces.

2. Poor Installation

Improper installation is one of the leading causes of roofing failures and premature wear. If the roofing system is not installed correctly, even high-quality materials won’t perform as expected.

Signs of Poor Installation

  • Visible gaps, bubbles, or wrinkles in the roof membrane
  • Improper alignment of roofing materials
  • Early failure of roofing components, such as flashing or vents

Fixes for Poor Installation

The only solution to poor roof installation often involves hiring experienced roofers to assess the entire system. Look for certified professionals who are trained to install specific roofing materials and systems. A good contractor will follow manufacturer guidelines to ensure longevity and performance.

3. Damaged Roofing Materials

Over time, harsh weather, constant UV exposure, and wear-and-tear can compromise even the best roofing materials. Cracks, tears, and surface abrasion are all common commercial roof problems caused by damaged materials.

Aerial view of two people repairing shingles on a gray rooftop. Tools and replacement shingles are scattered around them, and their shadows are visible on the roof.

Types of Roofing Material Damage

  1. Torn Membranes: Single-ply materials like TPO or EPDM can tear due to extreme weather or physical damage.
  2. Cracked Shingles or Tiles: Older roofs or those subjected to heavy loading often develop cracked shingles or tiles.
  3. Degraded Coatings: Protective coatings break down after prolonged exposure to the sun, reducing energy efficiency and water resistance.

Fixes for Damaged Roofing Materials

  • Replace damaged sections promptly to prevent further deterioration.
  • Apply new coatings to extend the roof’s lifespan and energy efficiency.
  • Use high-durability materials in future installations or repairs tailored to the local climate.

4. Ponding Water

Flat or low-slope commercial roofs often experience ponding water, making it one of the most persistent issues faced by property owners. Water that remains stagnant for 48 hours or longer can lead to structural issues, leaks, and the growth of algae.

Solutions for Ponding Water

  1. Install tapered insulation systems to improve drainage.
  2. Add additional drainage points to disperse water faster.
  3. Consider recoating the roof with a protective material specifically designed for water resistance.

5. Shrinkage and Blistering Problems

Issues like shrinkage, blistering, and cracks can significantly worsen over time if ignored, posing a serious threat to the integrity of a commercial roof.

Typical Shrinkage and Blistering Issues

  • Shrinkage occurs when the roof membrane contracts, leading to gaps around edges.
  • Blistering can develop due to trapped air, moisture, or poor adhesion during installation.

Fixes for Shrinkage and Blistering on a Commercial Roof

  • Inspect vulnerable areas regularly and fill gaps with appropriate sealants.
  • Conduct thermal imaging scans to pinpoint moisture pockets before resealing the blistered area.

✅ Checklist of Maintenance Problems (and Fixes)

Proper maintenance often prevents minor issues from escalating into full-scale repairs. Here’s a handy checklist to review potential maintenance problems and how to resolve them.

1. What happens if your gutters get clogged?

  • Problem: Clogged gutters lead to water pooling and possible leaks.
  • Fix: Clean gutters once per season to prevent blockages.

2. Is lack of regular inspections harming your roof?

  • Problem: Without inspections, small issues go unnoticed and worsen over time.
  • Fix: Partner with a professional roofing contractor to schedule biannual inspections.

3. Are failing roof coatings causing concerns?

  • Problem: Roof coatings may degrade, leaving the surface vulnerable to UV rays and corrosion.
  • Fix: Reapply a high-quality roof coating every 5–10 years for continual protection.

A construction worker in a safety harness and helmet uses a power drill to install metal roofing sheets on a building

Why Choose G. Cannon for Your Roofing Needs

When it comes to addressing common commercial roof problems, you need a trusted team with the expertise to deliver long-lasting solutions. At G. Cannon, we specialize in a wide range of roofing systems, ensuring your building remains secure, efficient, and well-maintained.

With decades of experience, advanced techniques, and a commitment to personalized service, G. Cannon has become the go-to roofing expert for commercial property owners and building managers alike.

Don’t wait for minor issues to become costly repairs. Contact G. Cannon today for your free roofing estimate and take the first step toward long-term reliability!

Father and son outside house, enjoying a stress-free cup of coffee.

Hassle-Free Services Every Time

Reach Out to G. Cannon Today!

Get a Free Estimate