Ponding water shortens membrane life, voids warranties, and generates callbacks. Here's a practical framework for picking the right fix.
Every ponding problem has a cause: structural deflection, inadequate slope in the original design, a curb or penetration interrupting flow, or a clogged/undersized drain. Match the fix to the cause — not the symptom.
If water has nowhere to go, no slope product will save you. Confirm drains are clear, sized correctly, and positioned at low points. Prefabricated drain and scupper flashings (like those from Acme Cone) make retrofit tie-ins cleaner and faster.
Behind curbs, skylights, and HVAC units, a cricket splits and redirects flow around the obstruction. Traditional builds use tapered insulation under the membrane — effective, but it means opening the roof system.
The right answer for large-area slope correction on reroofs, but heavy on design, lead time, and cost for a spot problem.
For localized ponding at curbs, a semi-self-leveling compound like Curb Slope creates positive slope from the curb to the field of the roof without tearing into the system. It's the service-call answer: fast application, fast return to service, no tear-off.
Whatever moves the water, the terminations decide whether it stays out. Membrane-clad metal (like Clad Rex laminated drip edge and gravel stop) and hand-welded prefab flashings keep edges and penetrations watertight where drainage changes direction.
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Send us the details — deck, membrane, and the problem. We'll match a product to it.
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