Leed Sri Roof

In the earlier leed 2009 requirements cool roofing did not consider aged sri as an option for qualification.

Leed sri roof.

New construction and major renovation about leed the leed leadership in energy and environmental design green building rating system is a voluntary consensus based market driven program that provides third party verification of high performance energy efficient sustainable. Low sloped roofs those below 2 12 and flat roofs must have an average initial albedo of at least 0 65 and steep sloped roofs must have an average initial albedo of 0 25 or more. Projects seeking leed v4 have the option of qualifying using either initial sri or by obtaining the 3 year aged sri value. To meet leed requirements a roofing material must have a sri of 29 or higher for steep slope 2 12 roofing and a sri value of 78 or higher for low slope roofing.

The environmental protection agency s energy star roof product program www energystar gov has cool roofing specifications for both low sloped and sloped roofs. Incorporates both solar reflectance and thermal emissivity in a single value. Green roofs and leed certification. Berridge s kynar 500 hylar 5000.

Green building council s leed 2 2 uses sri as a way to evaluate a cool roof. For leed compliance please reference the sri values for the berridge color finishes below. Leadership in energy and environmental design. Buildings can earn a credit for reducing the heat island effect with a high reflectance roof but it depends on the type of roof.

Gaf green building playbook for leed v4 updated february 2020 4 gaf green building playbook leed v4 for bd c. Emissivity is a material s ability to release absorbed energy. As shown in table 1 the minimum sri for cool roofing has increased in the newer leed v4. Leed version 2 2 is the first national specification to use a relatively new measure of reporting a cool roof s properties.

One way to make a decision is to use the solar roof index sri to evaluate a cool roof. For leed v4 in existing buildings low sloped roofs must have an initial sri of 82 or a three year aged sri of 64. Cool metal roof colors are optimal for reducing energy consumption particularly where cooling loads dominate. A steep sloped roof must have an initial sri of 39 or a three year aged sri of 32.