The Bauder green roof package light has been developed specifically for lightweight roof structures. The water storage panel can retain approx. 10 l /m2. This additional water reservoir enables the substrate to be reduced in depth to 50 mm The weight of the entire system when water-saturated comes to approx. 70 kg/m2. Due to the smaller amount of root space, the diversity of species is limited in comparison with the standard package. For roofs with sufficient load-bearing capacity we therefore always recommend the standard package.