Intensive Green Roof Loads

Applicable to the greengrid 4 inch depth.

Intensive green roof loads.

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. 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. The venny green roof melbourne. Depending on the source you look at these roofs may add 10 to 35 pounds per square foot to a roof s load.

Thus they have more substantial structural loads and need more frequent maintenance and watering. The solution is simple. The second trussed roof is designed for a dead load of 160kg m 2 and a live load of 40kg m 2. The venny green roof has shallow substrates on two types of roof the first roof is on shipping containers and is designed for a dead load of 250kg m 2 and live load of 100kg m 2.

In older buildings or new build this may require costly structural reinforcement which in some cases may prove prohibitively expensive. Where added loading is required the 6 inch or 8 inch depths can be designed as functional vegetative green roofs. A variation of the extensive green roof is called semi extensive. Typically the least expensive vegetative green roof application.

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. Photo by andrew wutke. Functional or extensive vegetative green roofs are well suited to roofs with little load bearing capacity.