Intensive Green Roof Loads

Applicable to the greengrid 4 inch depth.

Intensive green roof loads.

The second trussed roof is designed for a dead load of 160kg m 2 and a live load of 40kg m 2. Typically the least expensive vegetative green roof application. Where added loading is required the 6 inch or 8 inch depths can be designed as functional vegetative green roofs. In older buildings or new build this may require costly structural reinforcement which in some cases may prove prohibitively expensive.

Semi intensive green roofs include features of both types. They are usually accessible. Intensive green roofs have more soil and a deeper growing medium sometimes several feet that can support a more diverse plant selection including small trees. Photo by andrew wutke.

The venny green roof melbourne. Intensive green roofs weigh from 35 pounds to beyond 100 pounds per square foot when dry it is all a matter of the soil depth which is affected by the amount of mounding that is used. Extensive green roofs are the simplest to install and are very often added to existing roofs. Thus they have more substantial structural loads and need more frequent maintenance and watering.

A traditional green roof can exert a load of up to 250 kg per m2 and that inevitably means a strong building is required to support the weight. The solution is simple. Depending on the source you look at these roofs may add 10 to 35 pounds per square foot to a roof s load.