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LEED v2009
Existing Building Operations
Sustainable Sites
Heat Island Reduction—Nonroof

LEED CREDIT

EBOM-2009 SSc7.1: Heat island effect - nonroof 1 point

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Credit achievement rate

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LEEDuser expert

Crissy Tsai

Webcor Builders
Sustainability Coordinator

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Credit language

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© Copyright U.S. Green Building Council, Inc. All rights reserved.

Intent

To reduce heat islands1 to minimize impacts on microclimates and human and wildlife habitats.

Requirements

Choose 1 of the following options:

Option 1

Use any combination of the following strategies for 50% of the site hardscape (including roads, sidewalks, courtyards and parking lots):

  • Provide shade from the existing tree canopy or within 5 years of landscape installation; landscaping (trees) must be in place at the time of certification application.
  • Provide shade from structures covered by solar panels that produce energy used to offset some nonrenewable resource use.
  • Provide shade from architectural devices or structures that have a solar reflectance index (SRI)2 of at least 29. Implement a maintenance program that ensures these surfaces are cleaned at least every 2 years to maintain good reflectance.
  • Use hardscape materials with an SRI of at least 29 and implement a maintenance program that ensures these surfaces are cleaned at least every 2 years to maintain good reflectance.
  • Use an open-grid pavement system (at least 50% pervious).
  • OR

    Option 2

    Place a minimum of 50% of parking spaces under cover3. Any roof used to shade or cover parking must have an SRI of at least 29, be a vegetated roof or be covered by solar panels that produce energy used to offset some nonrenewable resource use. Implement a maintenance program that ensures all SRI surfaces are cleaned at least every 2 years to maintain good reflectance. The top parking level of a multilevel parking structure is included in the total parking spaces calculation but is not considered a roof and is not required to be an SRI surface.

    1 Heat islands are defined as thermal gradient differences between developed and underdeveloped areas.
    2 The solar reflectance index (SRI) 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 (reflectance 0.80, emittance 0.90) is 100. to calculate the SRI for a given material, obtain the reflectance value and emittance value for the material. SRI is calculated according to ASTM E 1980. Reflectance is measured according to ASTM E 903, ASTM E 1918, or ASTM C 1549. Emittance is measured according to ASTM E408 or ASTM C 1371.
    3 For the purposes of this credit, under cover parking is defined as parking underground, under desk, under roof, or under a building.
    Credit substitution available

    You may use the LEED v4 version of this credit on v2009 projects. For more information check out this article.

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Frequently asked questions

Our building doesn’t have any onsite parking. Can we earn this credit by documenting that we don’t provide parking to occupants?

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How can we calculate the SRI of our existing hardscape materials?

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Many of our building occupants use parking that’s outside the LEED project boundary and is not owned or maintained by building management or tenants (for example, city-owned street parking or a parking garage owned by another property manager). Do we include these spaces in our SSc7.1 calculations?

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We’re can’t earn this credit now but we’d like to when we go for EBOM recertification. How can reduce the heat island affect of our building’s site hardscape over time?

The answer to this question is available to LEEDuser premium members. Start a free trial »

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Credit achievement rate

XX%

Upgrade to LEEDuser Premium to see how many projects achieved this credit. Try it free »

LEEDuser expert

Crissy Tsai

Webcor Builders
Sustainability Coordinator

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USGBC logo

© Copyright U.S. Green Building Council, Inc. All rights reserved.

Intent

To reduce heat islands1 to minimize impacts on microclimates and human and wildlife habitats.

Requirements

Choose 1 of the following options:

Option 1

Use any combination of the following strategies for 50% of the site hardscape (including roads, sidewalks, courtyards and parking lots):

  • Provide shade from the existing tree canopy or within 5 years of landscape installation; landscaping (trees) must be in place at the time of certification application.
  • Provide shade from structures covered by solar panels that produce energy used to offset some nonrenewable resource use.
  • Provide shade from architectural devices or structures that have a solar reflectance index (SRI)2 of at least 29. Implement a maintenance program that ensures these surfaces are cleaned at least every 2 years to maintain good reflectance.
  • Use hardscape materials with an SRI of at least 29 and implement a maintenance program that ensures these surfaces are cleaned at least every 2 years to maintain good reflectance.
  • Use an open-grid pavement system (at least 50% pervious).
  • OR

    Option 2

    Place a minimum of 50% of parking spaces under cover3. Any roof used to shade or cover parking must have an SRI of at least 29, be a vegetated roof or be covered by solar panels that produce energy used to offset some nonrenewable resource use. Implement a maintenance program that ensures all SRI surfaces are cleaned at least every 2 years to maintain good reflectance. The top parking level of a multilevel parking structure is included in the total parking spaces calculation but is not considered a roof and is not required to be an SRI surface.

    1 Heat islands are defined as thermal gradient differences between developed and underdeveloped areas.
    2 The solar reflectance index (SRI) 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 (reflectance 0.80, emittance 0.90) is 100. to calculate the SRI for a given material, obtain the reflectance value and emittance value for the material. SRI is calculated according to ASTM E 1980. Reflectance is measured according to ASTM E 903, ASTM E 1918, or ASTM C 1549. Emittance is measured according to ASTM E408 or ASTM C 1371.
    3 For the purposes of this credit, under cover parking is defined as parking underground, under desk, under roof, or under a building.
    Credit substitution available

    You may use the LEED v4 version of this credit on v2009 projects. For more information check out this article.

XX%

Upgrade to LEEDuser Premium to see how many projects achieved this credit. Try it free »

Got the gist of SSc7.1 but not sure how to actually achieve it? LEEDuser gives step-by-step help. Premium members get:

  • Checklists covering all the key action steps you'll need to earn the credit.
  • Hot tips to give you shortcuts and avoid pitfalls.
  • Cost tips to assess what a credit will actually cost, and how to make it affordable.
  • Ideas for going beyond LEED with best practices.
  • All checklists organized by project phase.
  • On-the-fly suggestions of useful items from the Documentation Toolkit and Credit Language.

In the end, LEED is all about documentation. LEEDuser’s Documentation Toolkit, for premium members only, saves you time and helps you avoid mistakes with:

  • Calculators to help assess credit compliance.
  • Tracking spreadsheets for materials purchases.
  • Spreadsheets and forms to give to subs and other team members.
  • Guidance documents on arcane LEED issues.
  • Sample templates to help guide your narratives and LEED Online submissions.
  • Examples of actual submissions from certified LEED projects.

Our building doesn’t have any onsite parking. Can we earn this credit by documenting that we don’t provide parking to occupants?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

How can we calculate the SRI of our existing hardscape materials?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

Many of our building occupants use parking that’s outside the LEED project boundary and is not owned or maintained by building management or tenants (for example, city-owned street parking or a parking garage owned by another property manager). Do we include these spaces in our SSc7.1 calculations?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

We’re can’t earn this credit now but we’d like to when we go for EBOM recertification. How can reduce the heat island affect of our building’s site hardscape over time?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

LEEDuser expert

Crissy Tsai

Webcor Builders
Sustainability Coordinator

See all LEEDuser forum discussions about this credit » Subscribe to new discussions about EBOM-2009 SSc7.1