Stormwater Roof Drainage Design

Many factors affect how quickly water drains off a roof if water drains completely and if the roof is watertight.

Stormwater roof drainage design.

Roof drainage design by greg burn 1 october 2009 build 114 the roof on a new building needs to be more than just aesthetically appealing and able to keep the building weathertight it must also effectively collect and dispose of rainwater. Stormwater drainage design modern storm water design focuses on three important areas. Through dep approval of sew er certifications approval that the city sew er can accept the proposed discharge and. Stormwater is then carried away to either a collection point or to the graded area around the building and flows naturally away from the building.

A typical commercial or multifamily residential building will utilize one of the following types of primary roof drainage. A roof drainage system usually comprises gutters eaves and downpipes. Typical roofing stormwater work roof plumbing work involves a roof drainage system that collects and disposes of stormwater. Native beds established on the green roof at dpr s five borough building on randall s island.

This form of roof drainage is preferred if a clean exterior appearance is desired. Often the floor plan of a building is designed then a roof is fitted over the plan. These will drain to somewhere near the center of the roof and down through the building to underground storm mains or a detention pond.