Usgbc Requirements For Green Roof

The latest requirements for low slope roofing design.

Usgbc requirements for green roof.

This presentation provides requirements for successful low slope and roof design. 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. 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. 202 742 3737 crrc annual membership meeting.

Process water requirements added outdoor water use requirements added to design and construction. Nonroof and roof option 2. By lowering air conditioning demand green roofs decrease the production of associated air pollution and greenhouse gas emissions. Lighter and shorter vegetation is recommended for slanted roofs.

Materials that meet new and future energy efficiency regulations are. Green roofs must be designed to allow for safe access and working conditions for green roof inspection and maintenance personnel. For leed v4 in existing buildings low sloped roofs must have an initial sri of 82 or a three year aged sri of 64. A steep sloped roof must have an initial sri of 39 or a three year aged sri of 32.

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. State law requires that all applications for a green roof tax abatement must include an applicant agreement with a maintenance plan for the compliance period year of abatement plus three additional years. Chosen plants should be based on the type of roof surrounding climate and condition of the building.

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. For flatter roofs and stronger buildings taller and heavier vegetation can be used. 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.

Emphasis is placed on system components and defines design requirements materials selection and codes. Buildings can earn a credit for reducing the heat island effect with a high reflectance roof but it depends on the type of roof.