Flat roof repair
Leaks, splits and failed details on low-slope
Water still sitting 48 hours after rain is the industry's working definition of ponding, and it is a problem rather than a cosmetic issue. It adds dead load, accelerates membrane breakdown, and sits on seams continuously until one gives. The cause is almost always a drainage fault or a deflection in the deck rather than the membrane, so patching the leak that eventually appears without correcting the fall means doing it again.
Cook County sits far enough south to take the inland remnants of Gulf and Atlantic tropical systems, and on a low-slope roof that matters differently than it does on a pitched one. Sustained wind drives rain horizontally against upstands and parapets for hours, finding terminations and counter-flashing that shed vertical water perfectly well. The heat does the slower damage: roofs across Cook County run hot for most of the year, which ages membrane, hardens seam adhesive and works every detail loose through thermal cycling. Then the humidity means that once water is inside the build-up it does not leave — saturated insulation in this climate stays saturated, quietly adding load and destroying thermal performance long before anyone reports a leak. That is why a moisture survey here tells you more about a roof's remaining life than its age does.
Yes, in three ways. It loads the structure — water weighs about five pounds per square foot per inch of depth. It degrades most membranes faster under constant immersion. And it sits on seams continuously, which is where it eventually gets in.
Usually. Most ponding traces to blocked or undersized drainage, which is straightforward. Where it is genuine deck deflection, tapered insulation or crickets can restore fall over the affected area without touching the rest of the roof.
Leaks, splits and failed details on low-slope
Heat-welded single-ply
The joint between sheets
Extending life without a tear-off
Active water in an occupied building
Finding the source on a large roof
You will get a straight answer on whether Cook County needs someone out today or whether it can wait — before anyone quotes you for anything.
Call (706) 696-1888