Water Trapped Under Flat Roof Membrane in Chicago – What Homeowners Need to Know

If you’re dealing with a waterbed-like feeling under your flat roof in Chicago, you’re not alone. This common issue—where water gets trapped beneath the roofing membrane—can signal underlying problems that shouldn’t be ignored.

Water under the membrane can occur for several reasons. It might be due to openings or tears in the membrane, deteriorated seams, or compromised flashing. In some cases, masonry issues like cracks in parapet walls or gaps in coping can also allow water to seep beneath the surface. Poor drainage or clogged scuppers and downspouts may worsen the situation by allowing water to pool for extended periods.

At Anchor Point Roofing, our expert team begins the repair process by safely draining the trapped water and thoroughly inspecting the affected area. Once the surface is prepped, we install a new membrane that matches the existing system—whether it's a weathered TPO or modified bitumen roof. For modified bitumen roofs, we also apply a commercial-grade aluminum coating to enhance protection and extend roof life.

If you’re seeing signs of water intrusion or noticing a soft, spongy feel on your roof, don’t wait. Reach out to Anchor Point Roofing, your trusted Chicago flat roof repair experts. We’re here to help you protect your property with reliable, long-lasting solutions.

Location: Chicago, IL