The vegetation consists of shrubs and trees often in combination with ground cover.
Intensive green roof weight.
Layered system extensive growing media.
4 625 media depth 15 20 lbs ft2 25 30 lbs ft2.
You can compare an intensive roof to a normal garden and this is why an intensive green roof is also known as a roof garden or garden roof.
Once the plants are installed and the soil is moist these rooftop green spaces can weigh as much as 150 pounds per square foot.
The planting medium in intensive green roofs starts at 6 inches although you will see some wiggle room in various definitions and really elaborate designs may exceed a couple feed.
Plant material weight plugs or cuttings system depth dry weight saturated weight.
The depth of an intensive green roof is tied to the soil depth which is obviously affected by the frequency of mounding that is used.
With that in mind the real variable in the weight is the depth of planting material.
The depth of an intensive green roof ranges from 15 cm to as much as 150 cm and can easily weigh as much 300 to more than 1500 kg m2.
An intensive green roof weight varies from 35 to beyond 100 pounds per square foot when dry.
To bear this weight an expensive custom support structure is required.