Green Roof Substrate Depth

The physical and chemical properties of the substrate mix together with its depth and total volume influences what vegetation can be supported on the green roof.

Green roof substrate depth.

Intensive roofs which are thicker with a minimum depth of 12 8 cm 5 1 16 in and can support a wider variety of plants but are heavier and require more maintenance and extensive roofs which are shallow ranging in depth from 2 cm 13 16 in to 12 7 cm 5 in lighter than intensive green roofs and require minimal maintenance. We have investigated green roof meadows installed with 3 different substrate depths 50 75 100 125 mm and using two different substrates. These require irrigation and a substrate depth of at least 200 mm. Extensive green roof substrates are for use on shallow green roof systems 200mm depth and are often associated with sedum mat sedum plug plant or wildflower planting.

Intensive green roof substrates are engineered to suit larger vegetation such as shrubs and trees. Crucial for the adoption and installation of the systems. The green roof design needs to accommodate adequate water retention suitable drainage structural loading and the depth of green roof growing substrate. The depth varies depending on the type of roof you are constructing.

Continued research the swedish green roof market is currently undergoing a change towards an increased. There are two types of green roof. Careful plant selection and maintenance is needed to ensure annuals do not become weeds on a green roof. Extensive 25 100mm.

Semi extensive 100 200 mm. Have a known saturated weight loading that forms part of the structural load capacity of the roof.