Pwd Green 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.

Pwd green roof.

Two types of green roof exist. Since one green acre is as valuable as another water department workers have been installing green stormwater infrastructure projects in a range of public areas focusing on neighborhoods with little or no green space. But they also must create a growing area and potentially provide support irrigation and root protection barriers while staying as light as possible. Green roofs can be added to existing roofs and can cover all or part of the roof.

A green roof also known as a rooftop garden or a living roof is a vegetative layer grown on a rooftop. Green roof growing medium is composed of mineral aggregates and only a small amount of organic material. The site is intended for use by providers of professional planning and engineering services contracted by philadelphia. It is also recommended that the applicants notify the philadelphia city planning commission regarding its review of the zoning permit application.

There are two general categories of green roofs. It should also be light weight resistant to decomposition and compression and physically and chemically stable. The philadelphia water department has taken the lead in the project through its green city clean waters initiative. The layers of a green roof must like any roof accommodate drainage and protect the building from the elements with a waterproof membrane.

Green roofs can be combined with other stormwater management practices smps in series to meet the philadelphia water department pwd stormwater regulations stormwater regulations. Gsi projects installed and maintained by pwd as part of our gsi program. Unlike traditional black tar roofs green roofs reduce energy costs by absorbing heat instead of attracting it and. A green roof can be installed on many types of roofs from small slanting roofs to large commercial flat roofs.

A green roof is effective in reducing the volume and velocity of stormwater runoff from roofs by temporarily storing stormwater slowing excess stormwater released into the combined sewer system and promoting evapotranspiration. A construction certification package for the green roof. The designer is referred to section 3 2 4 for information on using smps in series. It should have good consistent drainage and aeration with a structure that enables it to hold water.