Commercial Roof Leak Repair: Fixing A Leaky Roof

March 20th, 2024 BY First American Roofing

Dealing with a leaky roof at your commercial property? Don’t panic! In this blog post, we’ve got you covered with everything you need to know about commercial roof leak repair. From identifying the source of the leak to fixing it for good, we’ll walk you through the process step by step. Let’s dive in and get that leaky roof sorted out!

Inside this blog:

Keep reading to learn everything you need to know about commercial roof leak repair so you can ensure your investment remains protected with a solid roof over its head!

💧 Understanding Commercial Roof Leaks

First things first, let’s talk about why commercial roofs leak in the first place. Commercial roofs are exposed to the elements day in and day out, and over time, wear and tear can take its toll. Here are a few common reasons why commercial roofs develop leaks:


As commercial roofs age, they become more susceptible to damage from exposure to sunlight, rain, and temperature fluctuations. Over time, the materials may degrade, leading to cracks, tears, and other vulnerabilities that can result in leaks.

Poor Installation

If a commercial roof was not installed correctly or with subpar materials, it may develop leaks sooner rather than later. Improperly sealed seams, inadequate flashing, and shoddy workmanship can all contribute to premature roof failure and water infiltration.

Weather Damage

Severe weather events such as storms, high winds, and hail can cause damage to commercial roofs, leading to leaks. Flying debris, falling branches, and pounding rain can compromise the integrity of the roof system, creating entry points for water to enter the building.

Lack of Maintenance

Neglecting regular maintenance tasks such as cleaning gutters and inspecting for damage can allow small issues to escalate into major leaks over time. By staying proactive with maintenance, property owners can catch potential problems early and address them before they lead to costly water damage and disruptions to business operations.

🔍 Identifying the Source of the Leak


The first step in fixing a leaky roof is identifying where the leak is coming from. 

Here’s how to do it:

Inspect the Interior

Start by inspecting the interior of your commercial property for water stains, mold, or damp spots on the ceiling or walls. These can indicate the general location of the leak. Additionally, look for signs of water accumulation or pooling, as these may suggest an ongoing or persistent leak that requires immediate attention.

Check the Roof

Next, head up to the roof and look for signs of damage such as missing shingles, cracked flashing, or punctures in the roofing membrane. Pay close attention to areas where different roofing materials meet, as these are common spots for leaks to occur. Don’t forget to check around rooftop equipment, vents, and chimneys, as these areas are prone to leaks due to penetrations in the roof surface.

4 Common Commercial Roof Leak Repair Solutions

Once you’ve identified the source of the leak, it’s time to fix it! Here are some common commercial roof leak repair solutions:

1. Patch Repairs

For small leaks or punctures in the roofing membrane, patch repairs can be a quick and effective solution. Roofing contractors can apply patching material to seal the leak and prevent further water infiltration. It’s important to ensure that the patch material is compatible with the roofing material to achieve a lasting repair.

2. Flashing Replacement

Damaged or deteriorated flashing around vents, chimneys, or skylights can cause leaks. Replacing the flashing with new, weatherproof material can help prevent water from seeping into the roof.

Additionally, consider upgrading to more durable flashing materials, such as stainless steel or copper, for enhanced longevity and protection against future leaks.

3. Sealant Application

Applying a waterproof sealant to seams, joints, and penetrations in the roofing membrane can help create a watertight barrier and prevent leaks. Be sure to choose a high-quality sealant that is specifically designed for use on commercial roofing systems and follow the manufacturer’s instructions for proper application to ensure optimal performance.

4. Roof Coating

Applying a reflective roof coating can not only seal leaks but also extend the lifespan of the roof by protecting it from UV damage and reducing energy costs. Roof coatings come in various formulations, including acrylic, silicone, and elastomeric, each offering different benefits such as flexibility, durability, and weather resistance.

Consider consulting with a roofing professional to determine the best coating option for your commercial roof based on its specific needs and conditions.

Tips for Preventing Future Roof Leaks


Nobody wants to deal with a leaky roof twice! Here are some tips for preventing future roof leaks:

🛠️ Fix Your Leaky Roof Like a Pro

Dealing with a leaky roof at your commercial property can be stressful, but with the right approach, it’s nothing you can’t handle! By identifying the source of the leak, implementing the appropriate repair solutions, and taking steps to prevent future leaks, you can keep your commercial property dry and protected for years to come. So roll up your sleeves, grab your toolbox, and let’s get that leaky roof fixed once and for all! 

Contact our pro roofers at First American Roofing today for top tier customer service and high quality craftsmanship. We’re excited to hear your questions and help bring your roofing vision to life!