Waterproof membranes now make it easier to design green-roof systems that capture water for irrigation, allow drainage, support the growing medium, and resist the invasion of roots.

• 如今防水膜让绿色屋顶系统的设计变得更容易，可以捕捉水分以灌溉、进行排水、支持生长培养基，并防止植物的根入侵。