Ponding water on aluminum roofing occurs when water collects and remains standing for more than 48 hours after rain. This happens because the roof surface is uneven or has dips where water can’t drain properly. It can also be caused by clogged gutters, improper roof pitch, or debris build-up blocking water flow. If left untreated, ponding water can accelerate corrosion on aluminum roofs and lead to leaks or structural damage over time. Simple diagnostics involve visually inspecting your roof after rain to identify low spots where water pools instead of flowing off. You can safely check for blockages in gutters and downspouts, remove any debris, and ensure that roof drains are clear to improve drainage. These are small DIY steps that can often reduce ponding without significant costs or risk.
If ponding persists despite these initial checks, it’s a good idea to call a professional roofer experienced with metal roofing. When consulting a contractor, ask specifically if they have experience with aluminum roof maintenance and how they plan to address drainage issues without compromising the metal’s protective coatings or warranty. Also, inquire about their method for leveling or repairing roof surfaces—will they use sealants, add tapered insulation, or replace panels? These questions help ensure the fixes are durable and won’t inadvertently void your warranty. Since aluminum roofs require careful handling, professional evaluation is essential to confirm the roof’s structural integrity and prevent ongoing damage from water accumulation.