Pwd Green Roof

What is a green roof.

Pwd 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. In a major initiative philadelphia is building an extensive network of rain gardens green roofs wetlands and other infrastructure to capture stormwater. A business is provided the credit to reward the construction of a roof that supports living vegetation. Green infrastructure trees green roofs and bio retention areas creates shade reduces the amount of heat absorbing materials and emits water vapor all of which cool hot air.

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. The green roof tax credit is a credit against the business income and receipts tax birt. This cooling effect will be sufficient to reduce heat stress related fatalities in the city during extreme heat wave events.

There are two general categories of green roofs. Green roofs can be added to existing roofs and can cover all or part of the roof. 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. Gsi projects installed and maintained by pwd as part of our gsi program.

The designer is referred to section 3 2 4 for information on using smps in series. 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 green roof is a roof or section of roof that is vegetated.

The site is intended for use by providers of professional planning and engineering services contracted by philadelphia. This is a resource for planners and designers seeking guidance on the process for creating green stormwater infrastructure gsi for philadelphia water. A green roof can be installed on many types of roofs from small slanting roofs to large commercial flat roofs. They fall into three main categories extensive intensive and semi intensive.

A green roof is a roof that has been covered with living vegetation to provide stormwater management cooling natural habitat and other benefits.