How Much Gph For Extensive Green Roof

These are usually container or raised bed gardens.

How much gph for extensive green roof.

Extensive green roofs have a growing medium of less than 200mm and a roof structure similar to conventional roof coverings. They need at least 30cm 1ft depth of. Extensive green roofs are a surface treatment for rooftops typically less than 6 inches in depth involving the addition of growth media and plants to create a sustainable green space on a flat or nearly flat roof. The popularity of green roofs has increased in the united states due to their many benefits while pretty green roofs serve a much greater purpose than simple beautification.

They are virtually maintenance free. How much do green roofs cost. For a conventional roof. With more depth of growing substrate 100 200 mm it can support a greater diversity of plants but not shrubs and trees.

A green roof also known as a rooftop garden or a living roof is a vegetative layer grown on a rooftop. Intensive thick extensive thin and semi extensive somewhere in between. An extensive green roof on the other hand is a thinner lighter version that looks more similar to a standard roof. Calculating the average cost of green roofs can be difficult because there a number of variables not just the size and accessibility of the site but the types of plants that are going to be grown on it a large scale green roof on top of an exclusive london high rise might cost hundreds of thousands whereas the small garden you have on your garage may have cost.

An extensive green roof is the most common and least expensive type of green roof with costs ranging from 10 20 a square foot 2. They consist of a thin layer of soil with continuous coverage of growing material. Often it will be planted with sedum stonecrop. Hand weeding watering and feeding are all necessary and it may sometimes be necessary to replant areas that have failed.

15 to 50 per square foot. Consists of a thick layer of soil 50 200mm in which a variety of grasses herbs flowers and shrubs can grow. They weigh between 60 200kg sqm and are relatively economical. Semi extensive green roofs take 12 18 months to establish during which time they will need maintenance.

They are fairly lightweight and can be installed on roofs with a pitch from 0º to 30º. There are three basic types of green roof. 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. Semi extensive green roof.

It can be sloped or flat. Intensive vs extensive green roof. A semi extensive green roof sits somewhere in between the two main options and is based on the extensive roof principles.