Autumn brings not only beautiful colors, but also heavy rain showers and falling leaves that pose a risk to your home. Use this checklist to ensure that water on a flat roof doesn't have the chance to damage the structure.
Why a Fall Inspection is Essential
A flat roof is more vulnerable to the elements than a sloped roof. In the fall, leaves, twigs, and moss quickly accumulate, clogging drains. When this happens, a layer of water quickly forms on the flat roof . This extra weight can strain the roof structure and significantly increase the risk of leaks. By taking action now, you can prevent costly repairs this winter.
For more background information, please also read our article Water on a flat roof: The complete guide to causes, risks and solutions .
The ultimate checklist for your flat roof
1. Check the drains and city outlets
The most important step is clearing the rainwater drain. Manually remove any debris around the outlets. If the water doesn't drain immediately, the blockage is often deeper. You can read more about this in Choosing between a city drain or a leaf trap .
2. Inspect the roof covering for blisters and cracks
Carefully walk across the roof and look for imperfections. Bubbles often indicate trapped moisture, which can expand and cause cracks in frost. Also pay attention to the seams of the roof covering; these are the weakest points where water can penetrate.
3. Remove organic material
Leaves and branches retain moisture and create a breeding ground for algae and moss. This eventually damages the top layer of your roofing. A clean roof dries faster and reduces the risk of water retention on the roofing .
What to do if there is persistent water on a flat roof?
Sometimes a blockage isn't the only cause, but a construction defect prevents water from flowing to the drain. In that case, water remains even after cleaning. To determine whether this is harmful, you can read How much water can remain on a flat roof?
For situations where water needs to be removed manually, such as after a heavy downpour or a temporarily faulty drain, a flat-suction pump is essential. The
Flat suction submersible pump
Automation for extra security
Want a hassle-free experience? Then you can choose a system that automatically switches on when water is detected. This is especially useful for roofs prone to puddles or where drainage problems regularly occur. The
Submersible pump with water sensor 3mm
Frequently asked questions about roof maintenance
How often should I inspect my flat roof?
It's recommended to inspect your property at least twice a year: in spring and fall. An additional check is always advisable after a heavy storm.
Is stagnant water on a flat roof always bad?
A small puddle that evaporates within 24 hours is usually not a problem. If the water remains longer, it's called water accumulation, and action must be taken to protect the roofing.
Can I clean my gutters and drains myself?
Yes, with a ladder and good work gloves, you can easily do this yourself. Follow our step-by-step guide: Cleaning your gutters and drains yourself .
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Consequences of water accumulation for the roof covering