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LEED v4
Retail – New Construction
Sustainable Sites
Heat island reduction

LEED CREDIT

Retail-NC-v4 SSc5: Heat Island Reduction 1-2 points

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SPECIAL REPORT

LEEDuser expert

emily reese

LEED AP BD+C, GGP, GPCP, ENV SP, Fitwel Ambassador, GCP

Jacobs
Senior Sustainability Coordinator

SPECIAL REPORT

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Credit language

USGBC logo

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

Intent

To minimize effects on microclimates and human and wildlife habitats by reducing heat islands.

Requirements

Choose one of the following options:

Option 1. nonroof and roof (2 points except Healthcare, 1 point Healthcare)

Meet the following criterion:

Area of Nonroof Measures   Area of High-Reflectance Roof   Area of Vegetated Roof   Total Site Paving Area   Total Roof Area
—————— + —————— + —————— +
0.5   0.75   0.75    

Alternatively, an SRI and SR weighted average approach may be used to calculate compliance.

Use any combination of the following strategies.

Nonroof measures

  • Use the existing plant material or install plants that provide shade over paving areas (including playgrounds) on the site within 10 years of planting. Install vegetated planters. Plants must be in place at the time of occupancy permit and cannot include artificial turf.
  • Provide shade with structures covered by energy generation systems, such as solar thermal collectors, photovoltaics, and wind turbines.
  • Provide shade with architectural devices or structures that have a three-year aged solar reflectance (SR) value of at least 0.28. If three-year aged value information is not available, use materials with an initial SR of at least 0.33 at installation.
  • Provide shade with vegetated structures.
  • Use paving materials with a three-year aged solar reflectance (SR) value of at least 0.28. If three-year aged value information is not available, use materials with an initial SR of at least 0.33 at installation.
  • Use an open-grid pavement system (at least 50% unbound).

High-reflectance roof
Use roofing materials that have an SRI equal to or greater than the values in Table 1. Meet the three-year aged SRI value. If three-year aged value information is not available, use materials that meet the initial SRI value.

Table 1. Minimum solar reflectance index value, by roof slope

  Slope Initial SRI OR 3-year aged SRI
Low-sloped roof ≤ 2:12 82   64
Steep-sloped roof > 2:12 39   32

Vegetated roof
Install a vegetated roof.

OR

Option 2. parking under cover (1 point)

Place a minimum of 75% of parking spaces under cover. 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.

SITES-LEED Equivalency

This LEED credit (or a component of this credit) has been established as equivalent to a SITES v2 credit or component. For more information on using the equivalency as a substitution in your LEED or SITES project, see this article and guidance document.

See all forum discussions about this credit »

What does it cost?

Cost estimates for this credit

On each BD+C v4 credit, LEEDuser offers the wisdom of a team of architects, engineers, cost estimators, and LEED experts with hundreds of LEED projects between then. They analyzed the sustainable design strategies associated with each LEED credit, but also to assign actual costs to those strategies.

Our tab contains overall cost guidance, notes on what “soft costs” to expect, and a strategy-by-strategy breakdown of what to consider and what it might cost, in percentage premiums, actual costs, or both.

This information is also available in a full PDF download in The Cost of LEED v4 report.

Learn more about The Cost of LEED v4 »

Frequently asked questions

Should we include motorcycle parking spaces in our total parking count for the Parking Under Cover option?

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If the manufacturer cannot provide the SR or SRI values, can standard values be used based on the color of the material?

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

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If the top floor of a parking garage includes parking spaces, is it considered a roof or non-roof surface?

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.)

In LEED v4, are there standard allowed SR values for things like concrete, as in LEED 2009?

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

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How should we account for off-site parking under this credit?

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Can I exclude functional usable areas like recreation courts or rooftop patios?

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What if I need to have a material tested?

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Projects that provide covered parking are eligible for points under this credit, but what if a project provides no parking?

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

See all forum discussions about this credit »

Documentation toolkit

The motherlode of cheat sheets

LEEDuser’s Documentation Toolkit is loaded with calculators to help assess credit compliance, tracking spreadsheets for materials, sample templates to help guide your narratives and LEED Online submissions, and examples of actual submissions from certified LEED projects for you to check your work against. To get your plaque, start with the right toolkit.

LEEDuser expert

emily reese

LEED AP BD+C, GGP, GPCP, ENV SP, Fitwel Ambassador, GCP

Jacobs
Senior Sustainability Coordinator

Get the inside scoop

Our editors have written a detailed analysis of nearly every LEED credit, and LEEDuser premium members get full access. We’ll tell you whether the credit is easy to accomplish or better left alone, and we provide insider tips on how to document it successfully.

USGBC logo

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

Intent

To minimize effects on microclimates and human and wildlife habitats by reducing heat islands.

Requirements

Choose one of the following options:

Option 1. nonroof and roof (2 points except Healthcare, 1 point Healthcare)

Meet the following criterion:

Area of Nonroof Measures   Area of High-Reflectance Roof   Area of Vegetated Roof   Total Site Paving Area   Total Roof Area
—————— + —————— + —————— +
0.5   0.75   0.75    

Alternatively, an SRI and SR weighted average approach may be used to calculate compliance.

Use any combination of the following strategies.

Nonroof measures

  • Use the existing plant material or install plants that provide shade over paving areas (including playgrounds) on the site within 10 years of planting. Install vegetated planters. Plants must be in place at the time of occupancy permit and cannot include artificial turf.
  • Provide shade with structures covered by energy generation systems, such as solar thermal collectors, photovoltaics, and wind turbines.
  • Provide shade with architectural devices or structures that have a three-year aged solar reflectance (SR) value of at least 0.28. If three-year aged value information is not available, use materials with an initial SR of at least 0.33 at installation.
  • Provide shade with vegetated structures.
  • Use paving materials with a three-year aged solar reflectance (SR) value of at least 0.28. If three-year aged value information is not available, use materials with an initial SR of at least 0.33 at installation.
  • Use an open-grid pavement system (at least 50% unbound).

High-reflectance roof
Use roofing materials that have an SRI equal to or greater than the values in Table 1. Meet the three-year aged SRI value. If three-year aged value information is not available, use materials that meet the initial SRI value.

Table 1. Minimum solar reflectance index value, by roof slope

  Slope Initial SRI OR 3-year aged SRI
Low-sloped roof ≤ 2:12 82   64
Steep-sloped roof > 2:12 39   32

Vegetated roof
Install a vegetated roof.

OR

Option 2. parking under cover (1 point)

Place a minimum of 75% of parking spaces under cover. 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.

SITES-LEED Equivalency

This LEED credit (or a component of this credit) has been established as equivalent to a SITES v2 credit or component. For more information on using the equivalency as a substitution in your LEED or SITES project, see this article and guidance document.

Cost estimates for this credit

On each BD+C v4 credit, LEEDuser offers the wisdom of a team of architects, engineers, cost estimators, and LEED experts with hundreds of LEED projects between then. They analyzed the sustainable design strategies associated with each LEED credit, but also to assign actual costs to those strategies.

Our tab contains overall cost guidance, notes on what “soft costs” to expect, and a strategy-by-strategy breakdown of what to consider and what it might cost, in percentage premiums, actual costs, or both.

This information is also available in a full PDF download in The Cost of LEED v4 report.

Learn more about The Cost of LEED v4 »

Should we include motorcycle parking spaces in our total parking count for the Parking Under Cover option?

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.)

If the manufacturer cannot provide the SR or SRI values, can standard values be used based on the color of the material?

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.)

If the top floor of a parking garage includes parking spaces, is it considered a roof or non-roof surface?

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.)

In LEED v4, are there standard allowed SR values for things like concrete, as in LEED 2009?

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 should we account for off-site parking under this credit?

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.)

Can I exclude functional usable areas like recreation courts or rooftop patios?

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.)

What if I need to have a material tested?

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.)

Projects that provide covered parking are eligible for points under this credit, but what if a project provides no parking?

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

emily reese

LEED AP BD+C, GGP, GPCP, ENV SP, Fitwel Ambassador, GCP

Jacobs
Senior Sustainability Coordinator

See all LEEDuser forum discussions about this credit » Subscribe to new discussions about Retail-NC-v4 SSc5