Pwd Green Roof

This is a resource for planners and designers seeking guidance on the process for creating green stormwater infrastructure gsi for philadelphia water.

Pwd green roof.

An extensive green roof contains up to six inches of soil is lightweight accommodates shallow rooted plant species and provides baseline stormwater insulation and ecological benefits. Green roof growing medium is composed of mineral aggregates and only a small amount of organic material. A green roof can be installed on many types of roofs from small slanting roofs to large commercial flat roofs. 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.

Green roofs can be added to existing roofs and can cover all or part of the 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. The philadelphia water department has taken the lead in the project through its green city clean waters initiative.

The site is intended for use by providers of professional planning and engineering services contracted by philadelphia. 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 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. 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. Unlike traditional black tar roofs green roofs reduce energy costs by absorbing heat instead of attracting it and. Gsi projects installed and maintained by pwd as part of our gsi program.

A green roof also known as a rooftop garden or a living roof is a vegetative layer grown on a rooftop. It is also recommended that the applicants notify the philadelphia city planning commission regarding its review of the zoning permit application. Applicants should email pwd planreview phila gov to notify pwd that they intend to apply for the green roof density bonus. There are two general categories of green roofs.