What is the primary benefit of using green roofing systems?

The primary benefit of using green roofing systems is their significant contribution to stormwater management. Green roofs typically consist of vegetation, growing media, and a waterproofing membrane that together capture and absorb rainwater. This absorption delays the runoff and reduces the volume and velocity of stormwater that enters drainage systems, which can alleviate pressure on urban infrastructure and minimize the risk of flooding.

By retaining and slowing down stormwater flow, green roofs can also improve water quality, as the vegetation filters pollutants before the water reaches the ground or drainage systems. This makes them an excellent choice for environmentally sustainable building practices and urban planning.

While green roofs can enhance building aesthetics and potentially reduce energy costs by providing insulation, their most critical functional advantage lies in how they manage stormwater, making them valuable in urban environments where traditional drainage systems may be overwhelmed. The assertion that green roofs eliminate the need for waterproofing is inaccurate; proper waterproofing is still essential to prevent leaks and protect the building structure beneath the green roof.