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.

Pwd green roof.

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 business is provided the credit to reward the construction of a roof that supports living vegetation.

The site is intended for use by providers of professional planning and engineering services contracted by philadelphia. Green roofs can be added to existing roofs and can cover all or part of the roof. A green roof system is composed of multiple layers including waterproofing a drainage layer an engineered planting media and specially selected plants. In a major initiative philadelphia is building an extensive network of rain gardens green roofs wetlands and other infrastructure to capture stormwater.

They fall into three main categories extensive intensive and semi intensive. 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. These exceptions apply to properties in rm 1 cmx 2 and cmx 2 5 zoning districts. There are two general categories of green roofs.

Green roofs are also known as vegetative or eco roofs. A green roof can be installed on many types of roofs from small slanting roofs to large commercial flat roofs. What is a green roof. The green roof tax credit is a credit against the business income and receipts tax birt.

The philadelphia zoning code offers incentives to installing green roofs by providing exceptions to certain residential density rules. 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. This cooling effect will be sufficient to reduce heat stress related fatalities in the city during extreme heat wave events. 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 is a roof or section of roof that is vegetated.