Pounds Per Square Foot For Green Roof

Asphalt shingles architectural dimensional or laminate 3 05 lbs.

Pounds per square foot for green roof.

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. 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. Ft kilograms per square meter kg m 2 source. 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. Pounds per square foot lb ft 2 pounds per square 100 sq. Approximately 12 pounds per square foot what it is. The load increases with the use of heavier roofing material.

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. 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. Asphalt shingles luxury 4 25 lbs.

Today green roofs comes in two primary forms. 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. Asphalt shingles 3 tab or strip 1 95 lbs.

Weight loads start at 17 lbs. A more typical extensive roof with 3 to 4 inches of growing medium weighs 17 to 18 pounds per square foot and a deeper intensive system can weigh 35 pounds or more per square foot. Extensive green roofs are relatively light at 15 50 pounds 7 23 kilograms per square foot. Therefor a significant amount of attention must be paid to the various waterproofing and root barrier details.

When fully saturated and with mature plant cover a thin extensive green roof can weigh about 13 pounds per square foot.