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 roof loads.
They are usually accessible.
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.
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 venny green roof melbourne.
Where added loading is required the 6 inch or 8 inch depths can be designed as functional vegetative green roofs.
Depending on the source you look at these roofs may add 10 to 35 pounds per square foot to a roof s load.
Photo by andrew wutke.
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.
Applicable to the greengrid 4 inch depth.
Functional or extensive vegetative green roofs are well suited to roofs with little load bearing capacity.
A variation of the extensive green roof is called semi extensive.
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.
Extensive green roofs are the simplest to install and are very often added to existing roofs.