to reduce the thermal gradient differences between developed and
undeveloped land by implementing highly reflective impervious
surfaces or related strategies.
Option 1 - Combine the following strategies for 50% of site
hardscape. Shade (within 5 years of occupancy). Paving materials
with a Solar Reflectance Index (SRI) of at least 29. Open grid
Option 2 - Place a minimum of 50% of total parking spaces under
cover. Any roof used to cover parking must have an SRI of at least
- Replace asphalt with concrete where possible
- Plant trees in vegetation strips around parking lots or
- Consolidate parking into a parking garage
- In most cases, standard grey concrete complies with minimum SRI
- If using a weighted average calculation, specifying white (high
reflectance) cement can greatly increase the average reflectivity
of your impervious areas. This is a potential cost increase above
standard asphalt paving.
- In campus applications, check campus standards for acceptable
concrete mixes. Light or colored concrete may not be acceptable
when matching existing campus site design color schemes.
- Pervious pavement is required to meet the same reflectivity
standards as other hard surface areas such as concrete.
- Shading of non-roof impervious site surfaces is calculated as
the mean shade coverage at 10am, noon, and 3pm on June 21.
- Do not "double-count" shaded, high-albedo surface areas when
completing the credit calculations.
- 61% of all California LEED Certified projects achieved this
credit for LEED v2.1.
Additional EDR Resources
Design Briefs: Design
For Your Climate
Designers: e-News #6: What You Plant on the Outside Affects Energy