Intensive Green Roof Weight

Layered system extensive growing media.

Intensive green roof weight.

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. Once the plants are installed and the soil is moist these rooftop green spaces can weigh as much as 150 pounds per square foot. 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. The vegetation consists of shrubs and trees often in combination with ground cover.

375 drainage layer 1 water retention layer includes 2 lbs s f. 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. With that in mind the real variable in the weight is the depth of planting material. An intensive green roof weight varies from 35 to beyond 100 pounds per square foot when dry.

Plant material weight plugs or cuttings system depth dry weight saturated weight. To bear this weight an expensive custom support structure is required. 3 media depth 11 14 lbs ft2 20 24 lbs ft2.