Leed Cool Roof Requirements

2 the solar reflectance index is a measure of the constructed surface s ability to reflect solar heat as shown by a small temperature rise it is defined so that a standardblack surface reflectance 0 05 emittance 0 90 is 0 and a standard white surface.

Leed cool roof requirements.

Green roofs are another way to turn your roof into a cool roof and lower the heat island effect and can also promote biodiversity for the surrounding environment. As shown in table 1 the minimum sri for cool roofing has increased in the newer leed v4. Cool roof requirements depend on the roof s slope. 1 heat islands are defined as thermal gradient differences between developed and underdeveloped areas.

Credit values shown on this table reflect those available and do not represent a guarantee of credits to be issued. 202 742 3737 crrc annual membership meeting june 14 2017. Check your local energy code regarding the use of cool roof colors. V4 rating system updates theresa backhus pla leed ap bd c sites ap u s.

Low sloped roofs have a pitch of 9 5 or less 2 12 rise over run. The tabs below outline each rating system s requirements and options for seeking the heat island reduction credit. 31 2005 roofing materials used on low slope roofs with a slope of less than 2 12 must now meet a solar reflectance index sri of 78 while. When cool roofs are used for the heat island reduction credit the crrc rated products directory can be used to find products that meet the requirements.

Options requirements and points vary by rating system. In the earlier leed 2009 requirements cool roofing did not consider aged sri as an option for qualification. Studies monitoring buildings in california and florida demonstrate that cool roofs save residents and building owners 20 to 70 percent in annual cooling energy use and cool metal roofing can qualify for tax incentives and earn leed credits. Under new leed version 2 2 requirements approved oct.

Leed and metal roofing by kevin corcoran april 12 2006. Leed requirements are based on all materials constructed under the project contract of which metal products are only a portion. Cool roof savings cool roofs can reduce heat transfer to the indoor environment thereby lowering air conditioning costs. Usgbc leadership in energy and environmental design leed program currently uses minimum sri values of 78 and 29 for low and steep sloped cool roofs respectivelyiii.

Under new leed version 2 2 requirements approved oct.