Pwd Green Roof

In a major initiative philadelphia is building an extensive network of rain gardens green roofs wetlands and other infrastructure to capture stormwater.

Pwd green roof.

They fall into three main categories extensive intensive and semi intensive. The philadelphia zoning code offers incentives to installing green roofs by providing exceptions to certain residential density rules. These exceptions apply to properties in rm 1 cmx 2 and cmx 2 5 zoning districts. A green roof is a roof or section of roof that is vegetated.

There are two general categories of green roofs. A green roof can be installed on many types of roofs from small slanting roofs to large commercial flat roofs. The goal is to prevent runoff from overwhelming sewers and polluting waterways and to help green america s fifth largest city. A green roof system is composed of multiple layers including waterproofing a drainage layer an engineered planting media and specially selected plants.

A business is provided the credit to reward the construction of a roof that supports living vegetation. Green roofs can be combined with other stormwater management practices smps in series to meet the philadelphia water department pwd stormwater regulations stormwater regulations. Green roofs are also known as vegetative or eco roofs. What is a green roof.

A green roof is a layer of vegetation planted over a waterproofing system that is installed on top of a flat or slightly sloped roof. This is a resource for planners and designers seeking guidance on the process for creating green stormwater infrastructure gsi for philadelphia water. Gsi projects installed and maintained by pwd as part of our gsi program. By bruce stutz march 29 2018.

A green roof is defined by the ordinance as a treatment to a rooftop that supports living vegetation and includes a synthetic high quality waterproof membrane drainage layer root barrier soil layer and vegetation layer. Green roofs can be added to existing roofs and can cover all or part of the roof. The site is intended for use by providers of professional planning and engineering services contracted by philadelphia. This cooling effect will be sufficient to reduce heat stress related fatalities in the city during extreme heat wave events.

The designer is referred to section 3 2 4 for information on using smps in series.