{"id":711,"date":"2026-02-12T10:12:53","date_gmt":"2026-02-12T10:12:53","guid":{"rendered":"https:\/\/globalrainlock.com\/?p=711"},"modified":"2026-02-12T10:29:28","modified_gmt":"2026-02-12T10:29:28","slug":"wat-gebeurt-er-met-water-als-het-je-dak-raakt","status":"publish","type":"post","link":"https:\/\/globalrainlock.com\/en\/wat-gebeurt-er-met-water-als-het-je-dak-raakt\/","title":{"rendered":"What happens to water when it hits your roof?"},"content":{"rendered":"

Water on the roof: a simple phenomenon, with complex consequences. When rain falls, it seems simple: water comes, water goes. But due to the combination of increasingly extreme showers and more and more paving in urban environments, rainwater ends up in systems that are not made for it. Too fast, too much, too abrupt.<\/p>\n\n\n\n

What really happens to that water?<\/strong><\/p>\n\n\n\n

Peak flow<\/p>\n\n\n\n

During heavy rain showers, an extremely large amount of water reaches the roof at the same time in a short period of time. This not only causes a peak in discharge, but also a 'wave' that falls. Without buffering, this water goes directly into the sewer, which leads to overloading of the drainage system and risk of local flooding.<\/p>\n\n\n\n

Pavement and scale levels<\/p>\n\n\n\n

As a result, we see a recurring cycle of: too much water in too short a time (flooding), then too little water over long periods (drought) and also too much heat on paved surfaces (heat stress).<\/p>\n\n\n\n

Te veel water in te korte tijd (wateroverlast), dan te weinig water over lange periodes (droogte) en bovendien te veel hitte op verharde oppervlakken (hittestress). <\/p>\n\n\n\n

Building level as a starting point<\/p>\n\n\n\n

It all starts on the roof. If no effective buffering takes place there, the rest of the system \u2013 sewage, soil, urban heat balance \u2013 will follow immediately. Roofs without smart rainwater storage therefore not only cause water drainage, but contribute to the broader problem of water balance in the construction environment.<\/p>\n\n\n\n

Why is this relevant for you as a roof manager?<\/strong><\/p>\n\n\n\n

If you already invest in solar panels or infrastructure on your roof, you know how important a well-functioning roof is for lifespan, performance and maintenance costs. But rainwater also plays a role there: not only as a burden, but also as an opportunity;<\/p>\n\n\n\n