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PREVENTING COMMERCIAL ROOF LEAKS

June 24, 2024

Owning a commercial building provides a stable environment for your business to thrive. However, maintaining the building is crucial for smooth operations. One common issue that can disrupt your business is a roof leak.



Commercial roof leaks can do more than just inconvenience you; they can damage valuable assets critical to your business. Understanding why leaks happen and how to prevent them can reduce their impact on your property. Addressing a leaky roof quickly can save on repair costs and protect your assets in the long run.

Why Do Commercial Roofs Leak?

Understanding the causes behind commercial roof leaks helps in quickly identifying effective repair methods. Here are several common reasons why commercial roofs develop leaks, along with indicators to help you pinpoint these issues.

Drainage Issues

The drainage system of a commercial roof is vital for its longevity and ability to prevent leaks. Without adequate drainage, water can pool on the roof, finding its way into crevices and gaps, leading to leaks into the interior. Over time, the standing water not only exacerbates leaks but can also add undue weight to the building's structure, causing it to weaken. Additionally, pools of water can cause moss and plants to grow, which can damage the roof faster.

Proper drainage requires installing components like drains, downspouts, scuppers, and gutters during construction. If your roof already has these, regularly clear them of debris, leaves, and other blockages to ensure water flows off the roof efficiently.

Roof Design or Installation Problems

Many commercial buildings have flat/low-slope roofs because they cover large areas. However, this design can cause problems. If the roof isn't designed or installed well, it may leak often. Poor design might mean not enough drainage outlets or missing the slight slope needed for water to run off. These mistakes can make water pool and increase the risk of leaks.

Inadequate Sealing

Commercial roofs have many openings for like drains, vents, pipes, and HVAC units. These need to be carefully sealed to stop water from getting in and causing leaks. Even if they're sealed at first, it's important to check them often. Regular inspections help catch wear and tear early. If you notice any problems with the seals, fix them right away. This helps prevent worse roof damage later.

Inadequate Maintenance

Routine maintenance is crucial for the longevity and durability of any part of a building, and the roof is no exception. If you ignore maintenance, small problems can grow into big ones over time. Weather like strong winds and heavy rain can really test a roof, so checking it often is important. 



While you can't control the weather, regular inspections can help your roof stand up to it better. These checks can find weak spots or damage early, allowing for quick fixes that can make your commercial roof last much longer.

Flashing Damage

Flashing, the metal pieces that line the edges and joints of your roof, is crucial for preventing leaks. It protects the roofing membrane's edges. Over time, weather and temperature changes can cause flashing to warp, expand, or contract. This can create openings for water to breach the membrane and damage the roof's structure. Regular inspections can help spot warped or damaged flashing. Quick repairs or replacements of affected areas can prevent water infiltration and more extensive damage.

Membrane Damage

The commercial roof membrane is a waterproof layer that protects your building. It can get damaged over time by sunlight, people walking on it, extreme temperatures, and other factors. Look for signs of damage like holes, cracks, blisters, or shrinking areas that show the insulation underneath. If water gets into the insulation, it can cause leaks and might require big repairs or even replacing the whole membrane. Check your roof regularly and fix any damage quickly to avoid these problems.

End of Lifespan

Every roof, no matter how well-maintained, has a limited lifespan. Commercial roofing materials are made to last for a certain time, but they eventually wear out. Regular upkeep can help your roof last longer, but weather will still take its toll over time. If your roof is nearing its expected lifespan and you're having leak problems even with regular maintenance, it's probably time to think about replacing it. This can prevent more serious issues from developing in your building.

How to Avoid Commercial Roof Leaks?

A leaky roof in your commercial building may initially seem like a minor inconvenience, but it can lead to more significant problems if left unaddressed. Learning how to avoid leaks altogether is the best way to protect your building and save on costly repairs.

Clean Debris from Roof

Keeping your roof clean is crucial for good drainage. On a flat/low-slope roof, things like leaves, branches, dust, and trash can build up. This can block water flow and cause puddles. Set up regular checks to make sure your roof stays clear of debris. This helps prevent clogs in your drainage system.

Conduct Routine Inspections

Set up regular maintenance checks for your commercial roof to keep it in good shape. Professional inspectors can spot problems early, before they become big issues. They usually look at the roof's surface, openings, edges, and sealed areas. They'll make small repairs as needed to keep your roof working well.

Control Access to the Roof

Foot traffic can cause damage and leaks over time. To reduce this risk, only allow trained people to access the roof. Limiting who can go on the roof helps prevent accidents and ensures that those who do go up there know how to handle it properly.

Immediately Address Damage to Flashing or Membrane

Keep a close eye on your roof's flashing and membrane. If you see any cracks, warping, or other damage, deal with it quickly. Call roofing experts for immediate repairs. This can stop small problems from turning into big leaks.


 Following these steps can really help protect your commercial roof from leaks. But if you ignore leaks when they happen, you might face worse problems, such as:

Wall & Ceiling Damage

Leaks can cause interior damage. Paint may bubble or peel, and drywall might need replacement. Excess moisture can weaken structures, potentially leading to sagging or collapsed ceilings.

Mold & Mildew

Unaddressed leaks create ideal conditions for mold and mildew growth. This can spread through the HVAC system, affecting air quality and posing health risks.

Health Concerns

Mold exposure can trigger allergies and respiratory issues. Water accumulation also creates slip hazards, risking injuries and liability issues.

Electrical Problems

Water infiltrating electrical systems can cause short circuits or sparks, creating fire hazards. Protecting electrical systems from leaks is crucial for safety.

Rotting Wood

Wooden roof elements absorbing water can expand, contract, and rot. This weakens the roof's structural integrity, potentially leading to more serious issues over time.

How to Handle a Commercial Roof Leak?

Even with the best prevention, commercial roof leaks can still happen. When they do, it's crucial to have a plan ready. Acting quickly can help reduce damage and keep your building safe. A good response can minimize water damage and stop small problems from becoming big ones. Here's what you need to do if you find a leak in your commercial roof. These steps will help you handle the situation efficiently and protect your property.

Protect Your Space and Properties:

When a leak occurs, act quickly to safeguard your property. Move smaller items out of harm's way and use plastic tarps or sheets to cover larger items that can't be moved. Place buckets under the leak to contain water temporarily. These immediate steps can significantly reduce water damage to your equipment, furniture, and other valuables.

Locate the Source:

Identifying the exact entry point of the leak is crucial for efficient repairs. Carefully inspect the area, looking for issues in drainage systems or compromised roofing materials. Once you've found the likely source, mark it clearly. This will help your roofing contractor quickly diagnose and repair the problem, saving time and potentially reducing repair costs.

Call the Professionals for Maintenance:

After safeguarding your belongings and identifying the leak's source, it's time to bring in the experts. Contact a professional roofing contractor like All Seasons Roofing for repairs. They can provide solutions ranging from specific area repairs to full roof restoration or replacement. Given the complexities of commercial roof leaks, professional help ensures a thorough and lasting fix, protecting your building from future issues.

At All Seasons Roofing, we know how important it is to fix roof leaks quickly and properly. We use the right materials and methods to fix your specific leak problems. We don't just patch things up - we work to prevent future leaks too. Our careful approach helps protect your property and keeps your roof working well for longer. Let us take care of your commercial roof with our repair services and maintenance plans.

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