Pounds Per Square Foot For Green Roof

The additional weight of people on the roof must also be factored into the load calculations for a green roof.

Pounds per square foot for green roof.

Pounds per square foot lb ft 2 pounds per square 100 sq. 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. 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. Extensive green roofs are relatively light at 15 50 pounds 7 23 kilograms per square foot.

Its dry weight is 12 pounds per square foot and its wet weight is 18 pounds per square foot. Today green roofs comes in two primary forms. The dead load of a typical asphalt shingled wood framed roof is about 15 pounds per square foot. The fourth modular green roof system installed in 2008 was biotrays by green roof solutions.

Semi intensive green roofs require a bit more maintenance since the plants tend to need pruning irrigation and fertilization. Before creating a new flat roof or having it rebuilt you need to calculate what your expected structural load is. 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. 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.

You calculate this in pounds per square foot or usually abbreviated as psf. They are typically constructed in layers but can also be installed using a tray system. Note that roof systems typically include more than one type of material. What is your expected structural load.

The load increases with the use of heavier roofing material. A clay tiled roof may have a dead. Annual maintenance costs. Semi intensive systems generally weigh between 25 and 40 pounds per square foot when dry.

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. The ibhs also notes one inch of ice equals one foot of snow. The epa estimates that the cost of installing a green roof starts at around 10 per square foot for simpler extensive roofing and 25 per square foot for intensive roofs.