Leaks in a commercial roof quickly become a significant headache for any business owner. A single leak can disrupt operations, damage valuable equipment, and even pose safety risks to employees and customers. And while leaks might seem random, they often result from specific, avoidable issues. Factors such as poor installation, weather damage, clogged gutters, and even the natural wear and tear of time can all play a role.
By understanding what typically causes commercial roofs to leak, business owners can take proactive steps to protect their property. This guide will walk you through the most common reasons behind commercial roof leaks and how to keep your roof—and your business—dry and secure.
Poor Installation Practices
A commercial roof is only as good as the quality of its installation. Improper sealing, inadequate flashing, and poorly placed roofing materials can create weak spots where water can quickly enter.
A rushed job or cutting corners during installation often leads to small gaps or vulnerabilities that, over time, become major leak points. Ensuring your roof is installed by experienced professionals who adhere to industry standards can help prevent this common issue.
Ponding Water on Flat Roofs
Water pools on flat roofs, known as ponding, when water doesn’t drain properly. This can happen due to inadequate slope design, clogged drains, or debris accumulation. Over time, standing water can break down roofing materials, leading to leaks. Regular inspections and proper drainage solutions are vital to preventing ponding water from becoming a problem.
Damaged or Worn Flashing
Flashing is critical to any commercial roof, sealing the joints where the roof meets walls, chimneys, or other structures. Over time, flashing can rust, crack, or become loose due to weather exposure or building movement.
The damage or improper installation of flashing leaves gaps for water to seep in, leading to leaks. Regularly checking and maintaining flashing can help prevent these vulnerabilities.
Membrane Damage
Damage to the membrane is a common cause of leaks in flat roofs with membrane systems like TPO, EPDM, or PVC. These membranes can be punctured by foot traffic, debris, or severe weather conditions.
Even small tears or blisters can allow water to penetrate, causing damage to the roof’s underlying structure. Regular inspections to identify and repair minor membrane damage can prevent more extensive and costly problems later.
Age and Wear and Tear
All roofing materials degrade over time due to constant exposure to the elements. As a commercial roof ages, it becomes more susceptible to cracks, splits, and other forms of deterioration that can cause leaks. Regular maintenance and timely replacement of aging roofs are essential to avoid the inevitable problems of an old, worn-out roof.
Clogged Gutters and Downspouts
Gutter and downspouts are designed to carry water away from the roof. If leaves, debris, or dirt become clogged, water can back up and pool on the roof, leading to leaks. Routine cleaning and maintenance of gutters and downspouts can ensure proper drainage and help prevent water from damaging your roof.
Roof Penetrations and Additions
Penetrations such as vents, HVAC units, skylights, and other equipment installations are necessary for many commercial buildings but can also be potential leak sources. Over time, the seals around these penetrations can degrade, crack, or fail, allowing water to seep into the roofing system. Regular inspection and resealing of these areas can help prevent leaks from becoming problematic.
Weather-Related Damage
Many weather conditions, such as heavy rain, hail, snow, and high winds, can severely damage commercial roofs. Hail can puncture membranes, and strong winds tear off shingles or tiles. Ice dams can also form during winter, trapping water and causing it to back up under the roofing materials. Protecting your roof with durable materials and scheduling post-storm inspections can help catch and repair weather-related damage early.
Improper Roof Slope and Drainage Design
Slight slopes are necessary for flat roofs to ensure proper drainage. If the hill is adequate or the drains are appropriately placed, water can accumulate, leading to leaks. Regularly assessing the roof’s drainage design and making necessary adjustments can help prevent water from pooling and causing damage.
Lack of Regular Maintenance
One of the most common reasons for roof leaks is a lack of regular maintenance. Minor problems can be noticed with routine inspections and develop into significant leaks. Maintenance that includes regular inspections, cleaning, and minor repairs can help keep your commercial roof in good condition and leak-free.
Conclusion
Leaks in commercial roofing systems can stem from various causes, from poor installation and weather damage to natural wear and tear. Understanding these causes is essential for preventing leaks and maintaining a robust and durable roof. Regular inspections, quality installation, and proactive maintenance are critical strategies for keeping your commercial roof in optimal condition and protecting your business from costly disruptions.
At Torham Exterior Solution Inc., we offer comprehensive commercial roofing services, including installation, maintenance, and repair, to help businesses in Hamilton keep their roofs secure and their operations running smoothly.