Pounds Per Square Foot For Green Roof

Pounds per square foot lb ft 2 pounds per square 100 sq.

Pounds per square foot for green roof.

Weight loads start at 17 lbs. Green roofs are usually held in place just by the weight of the grow medium. Extensive green roofs traditionally support 50 120 kg m 2 10 25 pounds per square foot of vegetation while intensive roofs support 390 730 kg m 2 80 150 pounds per square foot of vegetation. Asphalt shingles architectural dimensional or laminate 3 05 lbs.

Today green roofs comes in two primary forms. Intensive which can hold up to 150 pounds per square foot and typically support more diverse types of plants but also requires more maintenance and extensive able to support up to 25 pounds of vegetation per square foot and usually grown naturally and without restriction needing only yearly weeding and fertilization. Tray systems are not a viable option for intensive roofs due to the weight. Asphalt shingles luxury 4 25 lbs.

Therefor a significant amount of attention must be paid to the various waterproofing and root barrier details. Ft saturated and increase with the depth of the grow media. Asphalt shingles 3 tab or strip 1 95 lbs. 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.

The load increases with the use of heavier roofing material. The foot or more of growing medium needed for an intensive green roof creates a load of 80 150 pounds 36 68 kilograms per square foot. Extensive green roofs are relatively light at 15 50 pounds 7 23 kilograms per square foot. Approximately 12 pounds per square foot what it is.

Xeroflor s green roof options include a range of lightweight systems from only 8 10 pounds per square foot to applications of 31 pounds per square foot. The dead load of a typical asphalt shingled wood framed roof is about 15 pounds per square foot. For extensive green roofs up to 150mm 6 in depth no additional structural is usually required. Our green roof assemblies can be used in basic flat roof applications as well as more dynamic roof structures even on slopes up to 45 degrees.

The lite system is typically used on retrofit projects when the roof is engineered with only 15 to 17 pounds per sf for the green roof component.