How Many Green Roofs Are Built

In 2012 the north american green roof industry recorded 982 green roof projects which was a 24 increase from 2011.

How many green roofs are built.

Installed the most green roofs in north america this past year with 1 326 872 square feet. In more scientific terms green roofs help filter and clean air as well as retain storm water. Some of the common benefits of green roofs are. Were chicago new york city toronto philadelphia and cincinnati.

Improved energy efficiency increased lifespan of the roof membrane proper sound insulation and many more. Green roofs are also becoming increasingly popular in the united states although they are not as common as in. Modern green roofs are made of a system of layers placed over the roof to support soil medium and vegetation. Green roof systems may be modular with drainage layers filter cloth growing media and plants already prepared in movable often interlocking grids or loose laid built up whereby each component of the system may be installed separately.

A properly designed and installed extensive green roof system can cost 108 248 m 2 10 23 sq ft while an intensive green roof costs 355 2 368 m 2 33 220 sq ft however since most of the materials used to build the green roof can be salvaged it is estimated that the cost of replacing a green roof is generally one third of the initial installation costs. This is a relatively new phenomenon and was developed in germany in the 1960s and has spread to many countries since then. It is planted over a specially designed water proofing membrane that ensures protection to the tradition roof of a building. The projects are located on a variety of building sites and represent a diverse set of available extensive green roof installation types including vegetated mat built up and modular tray systems as well as plant types.

This can lead to new opportunities in habitat creation as well as biodiversity preservation.