How Much Gph For Extensive Green Roof

How much do green roofs cost.

How much gph for extensive green roof. Consists of a thick layer of soil 50 200mm in which a variety of grasses herbs flowers and shrubs can grow. A semi extensive green roof sits somewhere in between the two main options and is based on the extensive roof principles. Semi extensive green roof. 8 to 20 per square foot.

Often it will be planted with sedum stonecrop. These are usually container or raised bed gardens. 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. They are fairly lightweight and can be installed on roofs with a pitch from 0º to 30º.

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. With more depth of growing substrate 100 200 mm it can support a greater diversity of plants but not shrubs and trees. Semi extensive green roofs take 12 18 months to establish during which time they will need maintenance. 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.

An extensive green roof on the other hand is a thinner lighter version that looks more similar to a standard roof. Unlike traditional black tar roofs green roofs reduce energy costs by absorbing heat instead of attracting it and. 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. Intensive thick extensive thin and semi extensive somewhere in between.

They weigh between 60 200kg sqm and are relatively economical. They are virtually maintenance free. For a conventional roof. Extensive green roofs have a growing medium of less than 200mm and a roof structure similar to conventional roof coverings.

15 to 50 per square foot. They need at least 30cm 1ft depth of. It can be sloped or flat. 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.

There are three basic types of green roof. Intensive vs extensive green roof. Extensive green roof advocates have claimed numerous benefits including improved air quality stormwater attenuation reduction of.