Roof Leaks Around Penetrations on Chicago Commercial Flat Roofs: What You Need to Know

Roof penetrations—such as PVC pipes, waste stacks, and ventilation exhausts—are among the most common sources of leaks on commercial flat roofs in Chicago. These penetrations create openings in the roofing system that must be properly flashed and sealed to remain watertight. Over time, flashing can deteriorate, fasteners can become exposed or rusted, and the seal around the base of the penetration may develop gaps—all of which can allow water to enter the building envelope.

At Anchor Point Roofing, we frequently address leaks caused by failing flashing or improper boot installations around these penetrations. As part of our repair process, we remove any deteriorated materials and provide and install new modified bitumen flashing or lead boots as needed. We also seal the repaired area with a commercial-grade aluminum coating to reinforce protection and blend with the existing roof system.

If your Chicago commercial roof has visible openings around roof penetrations or signs of interior water intrusion, it may be time for a professional inspection and targeted repairs. Contact us today to ensure your roofing system remains watertight and protected.

Service provided: Commercial Roofing

Location: Chicago, IL