Leed Sri Roof

Emissivity is a material s ability to release absorbed energy.

Leed sri roof.

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. Green roofs and leed certification. One way to make a decision is to use the solar roof index sri to evaluate a cool roof. Leed version 2 2 is the first national specification to use a relatively new measure of reporting a cool roof s properties.

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. 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. For leed compliance please reference the sri values for the berridge color finishes below.

In the earlier leed 2009 requirements cool roofing did not consider aged sri as an option for qualification. The environmental protection agency s energy star roof product program www energystar gov has cool roofing specifications for both low sloped and sloped roofs. Projects seeking leed v4 have the option of qualifying using either initial sri or by obtaining the 3 year aged sri value. Incorporates both solar reflectance and thermal emissivity in a single value.

Solar reflectance index sri. 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. Leadership in energy and environmental design.

Any roof used to shade or cover parking must 1 have a three year aged sri of at least 32 if three year aged value information is not available use materials with an initial sri of at least 39 at installation 2 be a vegetated roof or 3 be covered by energy generation systems such as solar thermal collectors photovoltaics and wind turbines. As shown in table 1 the minimum sri for cool roofing has increased in the newer leed v4. Leadership in energy and environmental design leed is the green building rating system developed by the united states green building council usgbc the intent is to provide a standard certification process that registers buildings constructed with environmental performance efficiency and occupant health. Berridge s kynar 500 hylar 5000.