Usgbc Requirements For Green Roof

On the other hand intensive green roofing structures consist of more than six inches of soil and have greater weight and maintenance requirements than extensive green roofs.

Usgbc requirements for green roof.

Installing a green roof will get you a half point if it covers over 50 of the home with another point if you install storm water controls to regulate runoff. A steep sloped roof must have an initial sri of 39 or a three year aged sri of 32. Leed certified builders can have their homes certified as green under the leed for homes system whereby architects specify what sorts of materials and processes will earn leed certification. Buildings can earn a credit for reducing the heat island effect with a high reflectance roof but it depends on the type of roof.

Lighter and shorter vegetation is recommended for slanted roofs. Process water requirements added outdoor water use requirements added to design and construction. 202 742 3737 crrc annual membership meeting. Green roofs must be designed to allow for safe access and working conditions for green roof inspection and maintenance personnel.

Applications for a solar tax abatement requires that the eligible expenditures of the solar electric generating system are disclosed. According to a study conducted by the national research council of canada even a six inch extensive green roof can reduce summer energy demands by more than 75 percent. In addition the roofing surface must also be able to withstand a wider variety of plant materials which can add considerable weight to the structure. The top layer of a green roof consists of vegetation.

Chosen plants should be based on the type of roof surrounding climate and condition of the building. The latest requirements for low slope roofing design. By lowering air conditioning demand green roofs decrease the production of associated air pollution and greenhouse gas emissions. For leed v4 in existing buildings low sloped roofs must have an initial sri of 82 or a three year aged sri of 64.

Emphasis is placed on system components and defines design requirements materials selection and codes. Overall green roof systems installed on 50 or more of the roof surface virtually guarantees 2 leed points and can contribute an additional 7 points toward leed certification almost 20 of the total needed for a project to be leed certified. This access must be a permanent feature of the building such as a pilot house roof hatch or exterior stairs to the green roof. For flatter roofs and stronger buildings taller and heavier vegetation can be used.

Materials that meet new and future energy efficiency regulations are. Nonroof and roof option 2.