Why a polder roof?
A surplus of paved surface creates high pressure on the sewer system in cities during heavy rainfall. Due to climate change, these downpours will become increasingly extreme. The polder roof is the solution for dynamic water storage on roofs. In this way, a huge part of the city can be softened, preventing flooding. Investments will have to be made in the public space (from garden to roof) to make the city rainproof. Rainwater can also be collected and reused.
Rainwater is a resource, not a waste stream.
What is a polder roof?
The polder roof consists of a system of crates in which rainwater can be stored. The basin created in this way can be dynamically controlled. In this way, the polder roof is able to store all the rain that falls on the roof and discharge it to the sewer system at a convenient time. In this way, flooding in the city is prevented. In addition, the polder roof serves as the drainage layer for the green roof, roof garden or roof park and the water that is stored in the polder roof can be used to irrigate the plantings.