Heat island reduction | U.S. Green Building Council
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LEED BD+C: New Construction | v4 - LEED v4

Heat island reduction

Possible 2 points

Submittal Tips (click to expand)

SS Credit: Heat Island Reduction

Option 1
  • Be sure that all areas are included in the calculations, even if the non-roof or roof materials do not meet the requirements
  • Note that LI 10235 (exempting functional space) is not applicable to v4, it can only be applied to v2009.
  • Ensure that the hardscape and roof areas are consistent with other credits. Be sure that the shade tree area is calculated as the 10-year canopy width at noon (i.e., in plan view, plant canopy width has no extending shadows regardless of time of year).
  • Ensure that the SR value is listed as a decimal value in the calculations.
  • Selected materials may meet either the initial SR/SRI threshold or the 3-year aged SR/SRI threshold. They are not required to meet both. Assume that the SR/SRI is an initial value if not specified in the manufacturer documentation as a three-year value.
  • Projects outside the U.S. can contact manufacturers directly and ask for SRI information. If manufacturers do not provide this information, the project team can identify a similar material from the Cool Roof Rating Council standard for comparison to show that the project’s material meets the intent of the credit.
  • Refer to LEED Interpretation 10411 for a listing of standard nonroof materials, in lieu of project-specific testing data. Manufacturer documentation or an independent testing report showing the tested SR value must be provided if not listed in LEED Interpretation 10411.
Option 2
  • Remember that parking for function of the site, maintenance vehicles for example, cannot be documented as spaces for this option. Include motorcycle parking in vehicle parking spaces.
  • Note that any roof used to shade or cover parking must have a three-year aged SRI of at least 32 or initial SRI of at least 39, be a vegetated roof, or be covered by energy generation systems, such as solar thermal collectors, photovoltaics, and wind turbines.