Green Roof Soil Depth

It is also important to factor in the type and lifetime of the roof membranethat will be used.

Green roof soil depth.

The surface and play requirements are much more demanding than for amenity turf. Careful species selection is needed to ensure outcomes can be met. Liveroof engineered green roof soil weighs approximately 27 to 29 lbs sq. Last for many decades.

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. Consult your local grower for specifics. The structural engineer must factor in the weight of completely saturated soil since the plantings and the soil will hold a significant amount of water. This is especially true of intensive green roofs which can have soil that is two feet deep or more.

These require irrigation and a substrate depth of at least 200 mm. Fully saturated at 4 depth when fully vegetated with liveroof plants. Sports turf requires a designed soil or growing medium to ensure effective drainage and a substrate. It is generally not recommended for hot climates.

Some green roofs are constructed specifically to support sports turf. The lite system is typically used on retrofit projects when the roof is engineered with only 15 to 17 pounds per sf for the green roof component. 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.