Leaks Around Scupper on Chicago Commercial Roof: Causes & Repair Solutions

Leaks around scuppers are a common issue on flat commercial roofing systems, especially in older Chicago buildings where weather and age have compromised the original installation. In this particular case, the scupper area was leaking due to loose membrane flashing, which had pulled away from the base and allowed water to bypass the drainage system and infiltrate the roof structure.

To properly resolve this issue, our team at Anchor Point Roofing will begin by carefully removing the deteriorated and loose membrane surrounding the scupper. This is a crucial step, as patching over compromised material will not ensure a lasting repair. Once the area is clean, we will apply an asphalt primer to prepare the surface for new material and promote proper adhesion.

Next, we will install new modified bitumen flashing around the entire scupper, overlapping the roof membrane and extending up the vertical surfaces as needed to create a watertight transition. Modified bitumen is a durable, flexible material well-suited for high-risk areas such as scuppers and penetrations on commercial roofs.

To complete the repair, we will seal the area with Lucas 6000, a high-performance, UV-resistant coating that enhances the longevity of the flashing and provides an additional layer of waterproofing. This process not only stops the active leak but also strengthens the roof’s ability to handle heavy rains and freeze-thaw cycles common in Chicago.

If you’re a building owner or property manager dealing with leaks around roof scuppers, contact Anchor Point Roofing for expert commercial roofing repairs in Chicago. We specialize in detailed membrane work and can help extend the life of your flat roof with targeted, high-quality repairs.

Location: Chicago, IL