Intensive Green Roof 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.

Intensive green roof weight.

Layered system extensive growing media. 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. 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. 3 media depth 11 14 lbs ft2 20 24 lbs ft2.

To bear this weight an expensive custom support structure is required. 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. 375 drainage layer 1 water retention layer includes 2 lbs s f.

Once the plants are installed and the soil is moist these rooftop green spaces can weigh as much as 150 pounds per square foot. With that in mind the real variable in the weight is the depth of planting material. 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.