Green roofs have lower runoff coefficients (water is retained), but they also release water slowly. However, during intense rain, once saturated, they behave like impermeable surfaces. Worse, gravel or vegetation can block outlets.
is more than a bureaucratic hurdle—it is a mature, field-tested engineering standard that prevents catastrophic roof failures. By adhering to its rainfall intensity maps, two-stage overflow protection, and rigorous hydraulic calculations, you ensure:
Solution : Always check the national annex for your country and the latest isohyetal maps.
Nbn En 12056-3 ((new)) [ PRO ]
Green roofs have lower runoff coefficients (water is retained), but they also release water slowly. However, during intense rain, once saturated, they behave like impermeable surfaces. Worse, gravel or vegetation can block outlets.
is more than a bureaucratic hurdle—it is a mature, field-tested engineering standard that prevents catastrophic roof failures. By adhering to its rainfall intensity maps, two-stage overflow protection, and rigorous hydraulic calculations, you ensure: nbn en 12056-3
Solution : Always check the national annex for your country and the latest isohyetal maps. Green roofs have lower runoff coefficients (water is