Extensive Vegetated Green Roofs

A green roof or rooftop garden is a vegetative layer grown on a rooftop.

Extensive vegetated green roofs.

Sometimes called vegetated roofs eco roofs or living roofs green roofs offer a number of sustainable advantages on an otherwise empty unused space. Using green roofs in cities or other built environments with limited vegetation can moderate the heat island effect particularly during the day. A 2006 study by the university of michigan comparing costs of conventional and green roofs showed that on average installing a green roof costs about 22 00 sq. Depending on load capabilities and other application driven requirements of your building s roof green roofs can be planted with herbs grasses flowers even trees in an exciting variety of.

The system is delivered fully pre vegetated. Green roofs are also known as vegetative or eco roofs. Although there are no precise definitions of. 8 to 20 per square foot.

15 to 50 per square foot. Extensive systems also known as compliance roofs are considered the work horses of vegetated roofs. A green roof is a layer of vegetation planted over a waterproofing system that is installed on top of a flat or slightly sloped roof. Vegetated roofs are often chosen based on their soil depth structural requirements and intended purpose and maintenance needs.

The vegetation is designed to be independent as a result of selecting plants capable of developing into a stable ecosystem. Consists of a thin layer of a rather mineral compost about 3 8 cm to 15 cm 1 in to 6 in thick in which very tough plants are being planted. Those plants are ideally native but other rustic species resistant to drought and or other climatic conditions of the environment can be used. There are three main types differ by cost depth of growing medium and plant type.

Fm global allows a vegetated roof over a steel deck with an appropriate fm fire test and suggests par. What is a green roof. 2 2 12 2 of fm loss prevention data sheet 1 35 that vegetated roofs be evaluated for interior fire exposure as regards a class i or class ii rating in the same manner as for conventional roofing systems on metal deck. Green roofs provide shade remove heat from the air and reduce temperatures of the roof surface and surrounding air.

They fall into three main categories extensive intensive and semi intensive. For a conventional roof.