Why Is My Flat Roof Leaking Around Roof Penetrations?

Leaks around roof penetrations on a flat roof are one of the most common issues property owners face, especially in areas like Chicago where roofs are exposed to constant weather changes. These leaks are often caused by a loose or deteriorating membrane around the penetration, or by failure within the pitch pan system. Over time, the existing pitch pan can settle, and the pourable sealant inside it may crack, shrink, or separate from the pipe or flashing. Once this happens, water can easily find its way into the roof system, leading to interior leaks and potential structural damage if left unaddressed.

At Anchor Point Roofing, we focus on addressing the root cause of the problem rather than just applying temporary fixes. Roof penetrations—such as vent pipes, HVAC lines, and electrical conduits—require proper sealing and flashing to remain watertight. If the surrounding membrane becomes loose or compromised, it creates vulnerable points where water can enter. Our team carefully inspects these areas to determine whether the issue stems from membrane failure, aging materials, or a settled pitch pan.

For penetrations with an existing pitch pan that has settled or where the pourable sealant has deteriorated, we provide a thorough repair process. This includes removing the old, failed sealant and replacing it with a new, high-quality pourable sealant designed to remain flexible and durable over time. In addition, we reinforce the entire area by installing new modified bitumen flashing around the pitch pan. This added layer of protection helps ensure a strong, long-lasting seal that prevents water intrusion even during heavy rain or snow melt.

In cases where the membrane around the penetration is loose or improperly installed, we secure and repair the membrane to restore its integrity. Proper flashing installation is key to preventing recurring leaks, and our team ensures that every roof penetration is sealed according to best practices.

If you’re experiencing leaks or want to proactively address potential problem areas, Anchor Point Roofing provides dependable Chicago roof repair services tailored to flat roofing systems. Our goal is to extend the life of your roof, eliminate leak points, and give you peace of mind knowing your roof penetrations are properly sealed and protected.

Location: Chicago, IL