NC-2009 SSc7.1: Heat Island Effect—Non-Roof

  • NC_Schools_CS_SSc7-1_Type3_CoolNonRoof Diagram
  • New or existing hardscapes?

    This credit is fairly straightforward and easy to achieve if you are newly creating all the hardscapes. You may comply by applying prescriptive design measures outlined by LEED to 50% of your site’s hardscape, or by covering 50% of your project's parking spaces. If, however, your project includes a planned or existing surface parking lot, replacing the existing asphalt or finding a cost-effective alternative to new asphalt may be challenging and can make this credit difficult to achieve.

    There can be added costs and labor if your project needs to modify existing hardscapes to meet the prescriptive goals of the credit: for example, taking out a black asphalt parking lot to install a more reflective material.

    When dealing with existing hardscapes, it may be more cost-effective to shade areas with trees and architectural canopies, or clean and restore them to their original condition, than to replace them. This credit can be unattainable if your project’s hardscapes do not already comply and you do not have control over the design of hardscapes. 

    Limiting your hardscape makes it easier

    Before working to treat the hardscape surfaces on your project site, don’t forget that the most effective way to reduce heat islands and help with this credit is to limit the amount of hardscape and parking spaces provided in the first place.

    Open-grid pavingLimiting hardscape not only reduces the square footage you must treat with light-colored paving, shading, open-grid paving, or covering, it can also help you gain points under:

    What’s “SRI”?

    The “solar reflectance index” or SRI is the measure of a surface’s ability to reflect solar heat. Higher reflectivity is desirable, because it helps combat the urban heat islandA densely populated area in which pavement and buildings absorb, store, and release solar energy, making the vicinity warmer than it would be if the pavement and buildings were not present. effect. SRI can range from zero to over 100, with darker surfaces closer to zero and lighter surfaces approaching 100.

    FAQs for SSc7.1

    I do not know the SRI value of my hardscape materials. What can I do?

    LEED requires specific SRI values based on product or material—no exceptions. Your first step is to try reaching out to your product manufacturers to obtain this information, or searching for any SRI values that might be applicable, if your material is generic. If this cannot be found, your next option is to send your material to a lab to be tested. Getting this data can be hard with existing materials other than concrete. Finding a similar product and comparing it to yours with images will not be accepted.

    How do I find a lab for getting SRI values? What will it cost?

    Look for laboratories that calculate SRI, or that test reflectivity and emissivity—once you have those values the LEED Online form will complete the calculation. Searching for labs using keywords like surfaces or optics may also be helpful. Make sure the lab you are using follows the reflectivity and emissivity testing ASTMVoluntary standards development organization which creates source technical standards for materials, products, systems, and services criteria mentioned in LEED. Testing could cost $500 to $1,000 per sample.

    I have a mix of various hardscape types with different SRI values. Can I apply a weighted average to see if my project complies?

    Yes, per LEED interpretationLEED Interpretations are official answers to technical inquiries about implementing LEED on a project. They help people understand how their projects can meet LEED requirements and provide clarity on existing options. LEED Interpretations are to be used by any project certifying under an applicable rating system. All project teams are required to adhere to all LEED Interpretations posted before their registration date. This also applies to other addenda. Adherence to rulings posted after a project registers is optional, but strongly encouraged. LEED Interpretations are published in a searchable database at usgbc.org. #5220 made on 07/30/2009, a weighted average is allowable similar to SSc7.2 for roof surfaces. The supporting weighted average calculator in LEEDuser's Documentation Toolkit section can be used to establish a weighted average for all hardscape materials used on your project.

    Should I use the SRI value of new or weathered concrete for my project?

    Concrete weathers over time and its SRI value goes down. Washing the concrete periodically during building operation is recommended. This LEED credit allows you to use the higher SRI value if the concrete is new. Old concrete should get a reduced value unless washed.

    What is hardscape? Is a gravel surface considered hardscape? How about artificial turf? Wood? Tennis courts?

    According to the LEED Reference Guide, "Hardscape consists of the inanimate elements of the building landscaping. Examples include pavement, roadways, stone walls, concrete paths and sidewalks, and concrete, brick, and tile patios." While this clearly demonstrates that gravel roads and paved tennis courts are hardscape, it leaves some gray area. LEEDuser is not aware of specific guidance relating to marginal surfaces like wood, turf, or pea-gravel, but when in doubt, we recommend considering any 'inanimate" surface hardscape, which would include all of those. This should be seen as an opportunity to meet the credit intent by using high-SRI materials.

    There is a reflecting pool on our site. What is the SRI of water? Should we include that in our calculations?

    No. LEED Interpretation #1412, issued 2/7/2006 sets the precedent here in stating that "Water features are excluded from the calculation."

Legend

  • Best Practices
  • Gotcha
  • Action Steps
  • Cost Tip

Pre-Design

Expand All

  • This credit is fairly straightforward to achieve: You may comply by applying prescriptive design measures outlined by LEED to 50% of your project site’s hardscape or by covering 50% of your project's parking spaces. 


  • Surfaces absorb and emit varying degrees of heat based on color and material. The photo shows four adjacent surfaces at the same time on a summer day in Chicago. The new black asphalt has the highest temperature at 126 degrees, while the new white concrete is almost 20ºF less, at 108ºF. Image – YRG SustainabilityIf you need to modify existing hardscapes to meet the prescriptive goals of the credit, you can face added costs. For example, demo of a black asphalt parking lot to install a material with a lighter SRI would be an added expense compared with resurfacing the same asphalt. When dealing with existing hardscapes, it may be more cost-effective to shade areas with trees and architectural canopies than to replace the hardscapes with lighter SRI material.


  • Examine existing conditions to help guide site plan development. Does your existing site have shading from trees, covered parking, or light-colored hardscape? Are there ways to minimize your project site’s hardscape and parking areas (including gravel, which is considered hardscape)?   


  • Define your project’s LEED boundary, and ensure that it is consistent across all credits pursued by your project. The LEED boundary defines the scope of work, and must include any land that will be disturbed and or used by your project.


  • Benefits of reduced hardscapeYou won’t find it in the credit requirements, but the best strategy here is to limit the amount of hardscape and number of parking spaces provided in the first place. This not only reduces the hardscape square footage you must treat with light-colored paving, shading, open-grid paving, or covering, it can also help you earn:


  • Explore ways to share parking with adjacent sites, and encourage carpooling and other strategies to reduce the amount of parking area needed.


  • Some strategies for limiting the amount of hardscape include: 

    • Share parking with adjacent sites, and encourage carpooling and other ways to minimize demand for parking.
    • Stack the parking— either underground or in a parking garage. 
    • Analyze anticipated site walking patterns to discover ways to minimize the length of sidewalks from parking lots to buildings. Place building entrances where people will need them, not far across expanses of sidewalk.
    • If there are existing trees onsite, look for opportunities to place the project’s necessary hardscapes adjacent to the trees to utilize shading and plant new trees and anticipate the shading that will be present in five years.

Schematic Design

Expand All

  • After you have reduced your parking hardscape as much as possible through reduced parking spaces, stacked parking, minimizing sidewalks, and other strategies, try the following steps to reduce heat island effect even further.


  • Option 1: Treat 50% of Site Hardscapes 


  • Determine the square footage of all non-roof hardscape on your site. You'll need to integrate the strategies below for 50% or more of this area.


  • Although an area of hardscape may meet two different requirements, the area can only be counted once. For example, pavement that is both light-colored and shaded may not be counted twice in credit calculations.


  • Shading by Trees and Vegetated Landscape


  • Explore integrating hardscape shading by trees.


  • Consult with a landscape architect to specify native and adapted tree species with large canopies. This strategy can reduce the number of trees that need to be planted, watered, and maintained—while providing the maximum shading potential.


  • It is helpful to plant trees in vegetated strips within hardscape areas to maximize the shading potential. Strips can be placed between parking rows, or as a vegetated buffer between surface parking and walkways.


  • Trees may be able to provide not only shade for hardscapes but also shade and wind protection for the building—potentially reducing cooling as well as heating loads in the building, and saving operational costs. 


  • When calculating the shading area of trees, you may need to use modeling software. Google Sketchup is a free, easy-to-use application that can help you determine shading area. (See Resources.) 


  • Treed shadow graphicTo determine the shadow cast by a tree, average the shadow area cast by the three time of day shown in the diagram.Shading is calculated on the summer solstice (June 21). Take the average of the shaded areas measured at 10:00 a.m., 12:00 p.m., and 3:00 p.m. 


  • Shading by Architectural Canopies or Photovoltaic (PV) Structures


  • Solar PV over parkingConsider shading parking with solar PV panels, which will also contribute to EAc1 and EAc2. Image – YRG SustainabilityExplore integrating architectural canopies with an SRI equal to or greater than 29, or photovoltaic (PV) canopies.


  • The shading area used for this requirement is equivalent to the footprint of the covering as seen from above (not the average shading angle as used for trees).


  • You cannot count shading cast from the building itself, as your project building does not cover non-building hardscape area from an aerial view. However, you can count canopies that protrude from buildings and shade hardscapes.


  • Architectural devices need to have an SRI of 29 or higher. This gives you a variety of light-colored materials to choose from. Get specifications from manufacturers as you choose materials.


  • Canopies, terraces, balconies, and other architectural devices are covered by the calculations for this credit if they do not have conditioned space below them. Coverings that have conditioned space below are considered roofs and are covered under SSc7.2: Heat Island Effect—Roof.


  • Shading using Photovoltatic (PV) panels is a great way to contribute to this credit, but the PV panels have the potential to create a lot of glare. Be sure to orient the PV panels in a way that does not affect building occupants or drivers (while still making sense from the perspective of exposure to the sun to generate electricity).


  • Installing freestanding canopies can be very cost-effective and will require little maintenance in the long run.  


  • PV canopies will have more of an upfront cost (that can often be offset with government incentives), but is a great way to install renewable energy onsite, contributing to EAc2: Onsite Renewable Power, without losing the functionality of your parking.


  • Light-Colored Materials


  • Explore integrating the use of light-colored hardscape material with an SRI value of at least 29.


  • SRI is the measure of a material’s ability to reject solar heat and is determined by a material’s light reflectance and heat admittance. For example, dark colors have values close to 0 SRI absorb most of heat they receive, while lighter colors have higher values and tend to reflect heat.


  • Obtain the SRI value of materials you are considering from the manufacturer.


  • For concrete and asphalt, you can use the following default SRI numbers from the LEED Reference Guide:

     


  • Power-washing old concrete can help restore it to near-new SRI values. For the purposes of documenting the credit, it is assumed that the material has the new value, unless existing hardscape is being used. For existing hardscape, you must either use the weathered value, or document that surfaces have been cleaned and lightened enough to be equivalent to the default SRI values.


  • Concrete has higher SRI values than asphalt and so is preferable for this credit. However, it is also generally more expensive than asphalt, but it is more durable and often has a lower life-cycle cost, as it must be replaced less often. This is especially true in high-traffic areas, turnarounds, and areas of heavy-duty vehicle use. If concrete can’t be used everywhere due to the price, use it selectively in high wear-and-tear areas.  


  • Open-Grid Paving


  • Explore using 50% pervious, open-grid paving.


  • Using open-grid paving allows water to infiltrate the ground, which could also help your project team achieve the stormwater management credits SSc6.1 and SSc6.2


  • Open grid pavingOpen-grid paving is different from porous paving—Open grid paving is laid out in a pattern that exposes areas of the ground allowing vegetation to grow in the open cells.  Porous paving is continuous paving that allows water to penetrate it minimizing runoff.  Porous paving alone without an open grid will not help you earn the credit, as you need the vegetation and its associated evapotranspiration help mitigate the heat island effect. Porous paving can qualify as a light colored material, however, if it has an SRI of 29 or higher. 


  • The open-grid paving itself should be at least 50% pervious and contribute to 50% of your project's hardscape areas.


  • Open-grid paving can be just as durable as other types of paving, but it may require additional maintenance to ensure that open cells do not become clogged.


  • Open grid paving is the most beneficial when it is applied on top of permeable soil that promotes infiltration. Soils with high clay content, or land with shallow bedrock may prevent water infiltration thus making open grid paving less functional.


  • Option 2: Cover 50% of the Site Parking


  • Determine the number of parking spaces needed for your project. Fifty percent or more of those need to be under cover—underground, under deck, under roof, or under the building. Parking roofs must have an SRI value of at least 29, or be vegetated, or be covered by architectural canopies or PV arrays (following the options listed above).


  • Consider locating parking underground, freeing up more site area for other uses, such as larger building footprints, open space, and landscaping.


  • If 50% of your project’s parking is underground or under the building, there is no parking roof requiring any SRI value. The building roof would be calculated according to SSc7.2 requirements even though the building covers parking spaces. 


  • If you use photovoltaic structures to shade hardscapes, they can count either toward shading hardscapes under Option 1, or shading parking spaces under Option 2—but not both.  Decide which compliance path you want the PV to fall under.  


  • Parking spots apply to all parking areas within the LEED boundary. Off-site parking outside the LEED boundary is not included in this credit.

Design Development

Expand All

  • Revisit your site hardscape area calculations to ensure that you are still meeting the requirement that 50% of the site hardscape is shaded, open-grid paved, or light-colored—or that 50% of the parking is under cover.  


  • Be sure to collect the SRI values for all hardscape materials you are planning to use toward this credit.


  • Create a site plan for the LEED submittal that clearly indicates the following:

    • For Option 1: Square feet of all hardscapes. This should be indicated for each type of hardscape material. Indicate the SRI value, shading area, and or open grid paving area on the plan for each hardscape type.
    • For Option 2: How many total parking spaces exist onsite, and how many are under cover.

Construction Documents

Expand All

  • Include any specific material properties and SRI criteria in the construction and landscaping specifications. 

Construction

Expand All

  • Ensure that the materials and landscaping are used according to your specifications for credit compliance.

Operations & Maintenance

Expand All

  • Include regular cleaning practices for hardscapes and coverings, especially for light-colored surfaces, as their SRI value will tend to drop, making them less reflective, as they get darker and dirtier. Committing to this is not required to earn the credit, but helps realize the benefit of it.


  • Include regular weeding practices for any open-grid paving, to keep the material durable and ensure that the spaces do not become clogged.

  • USGBC

    Excerpted from LEED 2009 for New Construction and Major Renovations

    SS Credit 7.1: Heat island effect - nonroof

    1 Point

    Intent

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

    Requirements

    Option 1

    Use any combination of the following strategies for 50% of the site hardscapeHardscape consists of the inanimate elements of the building landscaping. Examples include pavement, roadways, stone walls, concrete paths and sidewalks, and concrete, brick, and tile patios. (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 occupancy.
    • 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 reflectanceAlso known as albedo: the fraction of solar energy that is reflected by a surface on a scale of 0 to 1. Black paint has a solar reflectance of 0; white paint (titanium dioxide) has a solar reflectance of 1. The standard technique for its determination uses spectrophotometric measurements, with an integrating sphere to determine the reflectance at each wavelength. The average reflectance is then determined by an averaging process, using a standard solar spectrum, as documented by ASTM Standards E903 and E892 index2 (SRI) of at least 29.
    • Use hardscape materials with an SRI of at least 29.
    • 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 green roof or be covered by solar panels that produce energy used to offset some nonrenewable resource use.

    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 ASTMVoluntary standards development organization which creates source technical standards for materials, products, systems, and services 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.


    Potential Technologies & Strategies

    Employ strategies, materials and landscaping techniques that reduce the heat absorption of exterior materials. Use shade (calculated on June 21, noon solar time) from native or adapted trees and large shrubs, vegetated trellises or other exterior structures supporting vegetation. Consider using new coatings and integral colorants for asphalt to achieve light-colored surfaces instead of blacktop. Position photovoltaic cells to shade impervious surfacesSurfaces that promote runoff of precipitation volumes instead of infiltration into the subsurface. The imperviousness or degree of runoff potential can be estimated for different surface materials..

    Consider replacing constructed surfaces (e.g., roof, roads, sidewalks, etc.) with vegetated surfaces such as vegetated roofs and open grid paving or specify high-albedoAlbedo is synonymous with solar reflectance. materials, such as concrete, to reduce heat absorption.

Organizations

ASTM

This is the organization that sets the testing standards for material heat emissivityEmissivity is the ratio of the radiation emitted by a surface to the radiation emitted by a black body at the same temperature. and reflectance that help determine a material’s SRI.


American Concrete Pavement Association

This national association represents concrete pavement contractors, cement companies, equipment and material manufacturers, and suppliers. See Albedo: A Measure of Pavement Surface Reflectance, R&T Update (3.05) (June 2002).


Lawrence Berkeley National Laboratory, Heat Island Group

Lawrence Berkeley National Laboratory conducts heat island research to find, analyze, and implement solutions to minimize heat island effectHeat island effect refers to the absorption of heat by hardscapes, such as dark, nonreflective pavement and buildings, and its radiation to surrounding areas. Other sources may include vehicle exhaust, air-conditioners, and street equipment. Reduced airflow because of tall buildings and narrow streets exacerbate the effect.. Current research efforts focus on the study and development of more reflective surfaces for roadways and buildings.

Web Tools

Sketch-up

Use this software to model shaded areas from trees.


U.S. EPA, Heat Island Effect

This site offers basic information about heat island effectHeat island effect refers to the absorption of heat by hardscapes, such as dark, nonreflective pavement and buildings, and its radiation to surrounding areas. Other sources may include vehicle exhaust, air-conditioners, and street equipment. Reduced airflow because of tall buildings and narrow streets exacerbate the effect., its social and environmental costs, and strategies to minimize its prevalence.

Non-Roof Weighted Average Calculator

LEED BD&C allows projects with a mix of hardscapeHardscape consists of the inanimate elements of the building landscaping. Examples include pavement, roadways, stone walls, concrete paths and sidewalks, and concrete, brick, and tile patios. surface types (or projects with one hardscape type whose SRI is lower than the threshold but more than 50% of the total hardscape area) to demonstrate compliance through a "weighted" calculation, which can be performed with this spreadsheet.

Site Plan – 50% Parking Spaces Under Cover

Option 2

This site plan from a LEED project shows SSc7.1 compliance, with 50% of parking spaces located under cover.

Product Cut Sheets

Check the SRI index of products specified to earn this credit. The pavers in these examples have varying SRI values, some of which would contribute to the credit, and some of which would not.

SRI Calculator

This calculator produced by Lawrence Berkeley National Labs (LBNL) allows you to compute solar reflectanceAlso known as albedo: the fraction of solar energy that is reflected by a surface on a scale of 0 to 1. Black paint has a solar reflectance of 0; white paint (titanium dioxide) has a solar reflectance of 1. The standard technique for its determination uses spectrophotometric measurements, with an integrating sphere to determine the reflectance at each wavelength. The average reflectance is then determined by an averaging process, using a standard solar spectrum, as documented by ASTM Standards E903 and E892 index (SRI) and roof surface temperature based on solar reflectance and thermal emittance based on ASTMVoluntary standards development organization which creates source technical standards for materials, products, systems, and services standard E 1980.

LEED Online Forms: NC-2009 SS

The following links take you to the public, informational versions of the dynamic LEED Online forms for each NC-2009 SS credit. You'll need to fill out the live versions of these forms on LEED Online for each credit you hope to earn.

Version 4 forms: (newest)

Version 3 forms:

These links are posted by LEEDuser with USGBC's permission. USGBC has certain usage restrictions on these forms; for more information, visit LEED Online and click "Sample Forms Download."

Construction Submittal

HardhatDocumentation for this credit is part of the Construction Phase submittal.

224 Comments

0
0
Rashida Mogri Design Performance Leader Gensler
Aug 27 2014
LEEDuser Member

LEED Boundary & Covered Parking (Vegetated Roof)

We designed a building/garage right up against an existing building/garage. All of our new construction parking (within the LEED boundary) is either under the tower footprint, or under or vegetated green roof. During our preliminary construction review, the technical advice (action item) stated that existing satellite imagery indicated that the existing garage parking was not covered, and therefore we did not meet the credit requirements. If those are outside our LEED boundary, and not part of our building, shouldn't those be excluded? I was hoping to just resubmit a plan with the LEED boundary explicitly showing those spaces outside the LEED boundary.

Post a Reply
0
0
Laura Long Project Manager NORR
Aug 27 2014
LEEDuser Member
269 Thumbs Up

Regular Maintenance Program for Pressure Washing Concrete

Hi,

Could anyone tell me what would be considered "regular" maintenance for pressure washing concrete to be able to use the higher SRI value for the concrete? Is there a suggested amount of times per year to pressure wash the concrete?

1
1
0
Crissy Tsai Sustainability Coordinator, Webcor Builders Aug 27 2014 LEEDuser Expert 902 Thumbs Up

Laura,

I don't think there is an official statement for regular maintenance. The SRI is based off if the color of the concrete not on the maintenance.

Post a Reply
0
0
GBC Council CL Chile GBC
Aug 10 2014
LEEDuser Member
37 Thumbs Up

What about buildings occupying the whole site?

Hi! We have a building which occupies 100% of the project site as it is located in a densely developed area which allows it. This building has no parking, thus we can achieve SS c4.4 but what about SS c7.1? Can we achieve it if we have no hardscapeHardscape consists of the inanimate elements of the building landscaping. Examples include pavement, roadways, stone walls, concrete paths and sidewalks, and concrete, brick, and tile patios. at ground level?. Thanks so much for your help.

1
1
0
LEEDme STRATEGIE D'IMPRESA Aug 29 2014 LEEDuser Member 61 Thumbs Up

I think that a Zero lot line building can’t achive the credit 7.1. The purpose of this credit is to reduce the heat island effectHeat island effect refers to the absorption of heat by hardscapes, such as dark, nonreflective pavement and buildings, and its radiation to surrounding areas. Other sources may include vehicle exhaust, air-conditioners, and street equipment. Reduced airflow because of tall buildings and narrow streets exacerbate the effect. on the non-roof surfaces. If the project does not present hardscapes it will not be possible to implement any strategy that meets the requirements listed in the credit.

Alberto - LEEDme

Post a Reply
0
0
Courtney Royal, LEED AP BD+C Sr. Sustainability Consultant Taitem Engineering
Aug 06 2014
LEEDuser Member
968 Thumbs Up

Shading by trees

Hello,

I have never documented this credit by using the shading option from existing tree canopy. I understand you'll need to calculate shaded area from each tree on June 21 at 10, 12, and 3pm. My question is how do I get those values? Thanks!

1
1
0
Scott Adams Principal, Sustainable Integration LLC Aug 12 2014 Guest 19 Thumbs Up

You need to determine the diameter of the canopy and the height of each tree. With that information you can determine the shade area the same way you do for structures.

Post a Reply
0
0
Nicole Kimoto Architects Pacific, Inc.
Jul 30 2014
LEEDuser Member
445 Thumbs Up

Asphalt Paving Coatings?

The client has decided to proceed with providing new asphalt paving instead of concrete, but they are planning on providing a coating or thermoplastic paint over. If the coating/paint has an SRI of 29 or greater would this work to achieving this credit?

1
1
0
Crissy Tsai Sustainability Coordinator, Webcor Builders Aug 05 2014 LEEDuser Expert 902 Thumbs Up

Nicole,

If the painting/coating has a SRI of 29 or higher this would allow you to achieve the credit. I have used this approach on another project that achieved the credit.

Post a Reply
0
0
Q +
Jul 17 2014
LEEDuser Member
76 Thumbs Up

Grass pavers?

Good morning.

Anyone know if grass pavers count as hardscapeHardscape consists of the inanimate elements of the building landscaping. Examples include pavement, roadways, stone walls, concrete paths and sidewalks, and concrete, brick, and tile patios.? We've used this material instead of asphalt in a number of locations on a project, but if I can't count it as hardscape, I won't be able to categorize the positive impact on the potential heat island effectHeat island effect refers to the absorption of heat by hardscapes, such as dark, nonreflective pavement and buildings, and its radiation to surrounding areas. Other sources may include vehicle exhaust, air-conditioners, and street equipment. Reduced airflow because of tall buildings and narrow streets exacerbate the effect..

Thanks!

1
2
0
Crissy Tsai Sustainability Coordinator, Webcor Builders Jul 17 2014 LEEDuser Expert 902 Thumbs Up

Grass pavers do count as hardscapeHardscape consists of the inanimate elements of the building landscaping. Examples include pavement, roadways, stone walls, concrete paths and sidewalks, and concrete, brick, and tile patios. and should be calculated in the open grid paving system square footage.

2
2
0
Q + Jul 17 2014 LEEDuser Member 76 Thumbs Up

Great! Thanks so much, Crissy - both for the information and for getting back to me so quickly.

Have a good day!

Q

Post a Reply
0
0
Sahar Abi-Ziki
Jul 01 2014
Guest
57 Thumbs Up

any SRI requirements for pavers and roads on site?

We are trying to achieve SS.c7.1, we have more then 50% of parking underground. we have few parking on site (outside and not covered) and we were wondering if there is any requirements of SRI for these parking spots. Is there any SRI minimum requirements for the pavers, walkways, and roads on sites? I have problems feeling the LEED letter for this credit , I am choosing case 1 (option 2) but I am not able to achieve 1 point by only entering the info regarding number of parking spots, am I missing something here?

1
1
0
Crissy Tsai Sustainability Coordinator, Webcor Builders Jul 17 2014 LEEDuser Expert 902 Thumbs Up

First I would document the credit as Case 2 - Parking Undercover and input the parking spaces there.

Post a Reply
0
0
Jonathan Weiss
Jun 24 2014
LEEDuser Member
2170 Thumbs Up

Louvered Parking Cover

I've been working on this type of strategy for a long time but our design team asked me a question I could not answer:

For a project in a hot, arid climate we are designing parking coverage for 100% of the parking spaces - freestanding canopies - and we want to leave some open-ness so that air can move through and to minimize sand and dust accumulation on the canopies.

Is there guidance on how "covered" the covered parking needs to be? If we have 100% of parking that is 80% covered, is that equivalent to 80% of parking 100% covered? The template only offers a space for number of covered spaces, but is this a valid alternative compliance path?

Is the cover calculated by sunlight directly overhead? 12 noon on the equinox? Average of 10 AM and 2 PM?

Thanks!

Post a Reply
0
0
Heather DeGrella Sustainability Coordinator Opsis Architecture
May 07 2014
LEEDuser Member
545 Thumbs Up

Glass Canopy over Compliant Hardscape

We have a glass canopy over a plaza with compliant hardscapeHardscape consists of the inanimate elements of the building landscaping. Examples include pavement, roadways, stone walls, concrete paths and sidewalks, and concrete, brick, and tile patios.. Do we have to include the glass's SRI? Does anyone know of a default SRI for glass?

1
1
0
Heather DeGrella Sustainability Coordinator, Opsis Architecture Jun 16 2014 LEEDuser Member 545 Thumbs Up

Just wanted to bump this back into the conversation. Does anybody have a similar experience with an exterior glass canopy and have any knowledge of how that is considered for Heat Island effectHeat island effect refers to the absorption of heat by hardscapes, such as dark, nonreflective pavement and buildings, and its radiation to surrounding areas. Other sources may include vehicle exhaust, air-conditioners, and street equipment. Reduced airflow because of tall buildings and narrow streets exacerbate the effect.?

Post a Reply
0
0
E H Sustainability Architect
May 05 2014
LEEDuser Member
2958 Thumbs Up

SRI of wood?

I have a project with wood (not composite woodComposite wood consists of wood or plant particles or fibers bonded by a synthetic resin or binder. Examples include particleboard, medium-density fiberboard (MDF), plywood, oriented-strand board (OSB), wheatboard, and strawboard.) deck areas. How does one determine the SRI of the wood? Is there a default value available for light, medium, or dark wood?

1
1
0
Crissy Tsai Sustainability Coordinator, Webcor Builders May 06 2014 LEEDuser Expert 902 Thumbs Up

EH,

I haven't worked on a project that has deck areas, so I'm not quite sure how to determine the SRI of wood. Sorry.

Post a Reply
0
0
FABIO VIERO Head of Sustainability Manens-Tifs s.p.a.
Apr 01 2014
LEEDuser Member
461 Thumbs Up

Carparking spaces located under ground level

We have 100% of carparking spaces located in 2 stories below ground level.
All the roofs of the upper floor form the pedestrian hardscapeHardscape consists of the inanimate elements of the building landscaping. Examples include pavement, roadways, stone walls, concrete paths and sidewalks, and concrete, brick, and tile patios. for the plaza situated above.
In addition the plaza is located 7 meters below ground level and it is an open space to sky.
We would like to follow Option 2.
Questions:
1) Can we consider the parking as underground parking spaces
2) Does the pedestrian hardscape have an SRI requirement?

Thanks in advance for your help

1
1
0
Crissy Tsai Sustainability Coordinator, Webcor Builders May 06 2014 LEEDuser Expert 902 Thumbs Up

1) Yes, your parking will be considered 100% of spaces are underground.
2) The pedestrian hardscapeHardscape consists of the inanimate elements of the building landscaping. Examples include pavement, roadways, stone walls, concrete paths and sidewalks, and concrete, brick, and tile patios. should have an SRI of at least 29. If you have concrete you will meet this requirement as concrete is SRI 30.

Post a Reply
0
0
Eleni Tsivitzi Rowell Brokaw Architects, P.C.
Feb 27 2014
LEEDuser Member
6 Thumbs Up

Combine Option 1 and Option 2?

I was just wondering if anyone has attempted combining compliant SRI/shading by trees (option 1) with underground parking (option 2) for this credit. Obviously both meet the intent and it would seem reasonable to be able to use both to achieve the credit. If so, is there a formula to demonstrate compliance - similar to the one in SSc7.2 Option 3?

Post a Reply
0
0
Charalampos Giannikopoulos
Feb 16 2014
LEEDuser Member
48 Thumbs Up

SRI documentation

At a project attempting SSc7.1 white cement tile has covered 100% of exterior hardscapeHardscape consists of the inanimate elements of the building landscaping. Examples include pavement, roadways, stone walls, concrete paths and sidewalks, and concrete, brick, and tile patios.. According to the Reference Guide table (p.122) the SRI value of the white cement tile is 90. Would reference to this table qualify as documentation for credit compliance?

1
1
0
Crissy Tsai Sustainability Coordinator, Webcor Builders Feb 18 2014 LEEDuser Expert 902 Thumbs Up

Yes, you can input 90 as the SRI for the white cement tile in the template and no further backup documentation is needed.

Post a Reply
0
0
Sahar Abi-Ziki
Feb 06 2014
Guest
57 Thumbs Up

SSc7.1: Heat Island Effect—Non-Roof

Hello,
Our project have 346 parking spaces on 4 underground levels , only 35 will be outside and will not be covered. Since we have more then 50% parking spaces under ground, we can achieve the credit. 2 questions:
- 16 out of 35 exterior spaces will be located on the roof top of a small part of the underground garage. Do we have to apply IRS 29 for this area?
- How can we achieve an exemplary performanceIn LEED, certain credits have established thresholds beyond basic credit achievement. Meeting these thresholds can earn additional points through Innovation in Design (ID) or Innovation in Operations (IO) points. As a general rule of thumb, ID credits for exemplary performance are awarded for doubling the credit requirements and/or achieving the next incremental percentage threshold. However, this rule varies on a case by case basis, so check the credit requirements. for this credit? Would it be possible if all exteriors constructed surfaces on site including the exterior parking area have 29 IRS? For example using new coating and integral colorant for asphalte to achieve light- colored surfaces instead of black top?
Thank you

1
1
0
LEEDme STRATEGIE D'IMPRESA Feb 07 2014 LEEDuser Member 61 Thumbs Up

You have to choose an option and than earn an Innovation in Design credit for exemplary performanceIn LEED, certain credits have established thresholds beyond basic credit achievement. Meeting these thresholds can earn additional points through Innovation in Design (ID) or Innovation in Operations (IO) points. As a general rule of thumb, ID credits for exemplary performance are awarded for doubling the credit requirements and/or achieving the next incremental percentage threshold. However, this rule varies on a case by case basis, so check the credit requirements. by demonstrating that either (1) 100% of nonroof impervious surfacesSurfaces that promote runoff of precipitation volumes instead of infiltration into the subsurface. The imperviousness or degree of runoff potential can be estimated for different surface materials. have been constructed with high-albedoAlbedo is synonymous with solar reflectance. or open-grid paving, or will be shaded within 5 years; or (2) 100% of the on-site parking spaces have been located under cover. Can you cover your 35 exterior spaces with PV panels or SRI>29 surfaces or other compliant design features?

Post a Reply
0
0
michelle bombeck Project Assistant O'Brien & Company
Jan 23 2014
LEEDuser Member
38 Thumbs Up

SRI calculation in credit form is off?

The SSc7.1 credit form gives you the option to either manually enter the SRI if you know it, or to enter the emittance and reflectance values and let the form calculate for you. The BD+C reference guide indicates that new gray concrete has an emissivityEmissivity is the ratio of the radiation emitted by a surface to the radiation emitted by a black body at the same temperature. of .9, a reflectance of .35, and an SRI of 38. Yet, when I enter the emissivity and reflectance on the credit form and click calculate, I am given an SRI of 99.8. Is this a glitch in the form or am I missing something?

1
1
0
Crissy Tsai Sustainability Coordinator, Webcor Builders Feb 07 2014 LEEDuser Expert 902 Thumbs Up

I would just manually enter in the SRI of 35 for the gray concrete. Typically, most products provide the SRI values.

Post a Reply
0
0
Devani PERERA Green Building Consultant ELAN
Nov 27 2013
LEEDuser Member
246 Thumbs Up

No parking and no hardlandscaping

My project does not have parking and more than 50% of the landscaping will be planted.

Can I validate this credit that we limit the creation of hardlandscaping?

Thanks a lot

1
4
0
Devani PERERA Green Building Consultant, ELAN Dec 02 2013 LEEDuser Member 246 Thumbs Up

To be precise, would the project still be eligible to submit this credit if the project has little or almost no hardscaping?

2
4
0
Crissy Tsai Sustainability Coordinator, Webcor Builders Dec 02 2013 LEEDuser Expert 902 Thumbs Up

Devani,

I would think that if the project has very little or no hardscaping you would not comply with the intent of the credit and would not be able to achieve the points.

3
4
0
Devani PERERA Green Building Consultant, ELAN Dec 03 2013 LEEDuser Member 246 Thumbs Up

Thank you Crissy for your response and you have confirmed my analyse of the credit.
But logically speaking larger landscaped spaces and reduced hardscaped areas has a more favorable effect on the heat island effectHeat island effect refers to the absorption of heat by hardscapes, such as dark, nonreflective pavement and buildings, and its radiation to surrounding areas. Other sources may include vehicle exhaust, air-conditioners, and street equipment. Reduced airflow because of tall buildings and narrow streets exacerbate the effect. than including hardscaped areas meeting the SRI values. But projects that use this path of increased vegetated spaces miss the oportunity to obtain the credit SSc7.1 which doesnt seem right. Have I got this right?

4
4
0
Crissy Tsai Sustainability Coordinator, Webcor Builders Dec 03 2013 LEEDuser Expert 902 Thumbs Up

Increase vegetated spaces would be considered under SSc5.1 - Site Development Protect or Restore Habitat or SSc5.2 - Site Development Max Open Space.

Post a Reply
0
0
Stefano G
Oct 01 2013
Guest
8 Thumbs Up

Underground parking roof?

For underground parking to qualify, can the roof just meet the CRIColor-rendering index, or CRI, is a scale of 0 to 100, used by manufacturers of fluorescent, metal halide, and other non-incandescent lighting equipment to describe the visual effect of the light on colored surfaces. Natural daylight is assigned a CRI of 100. of at least 29 requirement without being either a green roof or covered by solar panels?

1
1
0
Susan Walter Sr Project Architect, Wilmot/Sanz Oct 01 2013 LEEDuser Expert 14199 Thumbs Up

Short answer: Yes.

Longer answer: You said 'underground' which implies to me that parking is either below a building or below a plaza or landscaped area which complies with the credit. If you meant parking deck, then the answer is still yes with a qualifier. The top level of the deck can be covered with an SRI compliant topping but only the spaces below that level qualify.

It appears that the 'under desk' is a typo and should read 'under deck'.

Post a Reply
0
0
Marcio Alberto Casado Pereira
Sep 30 2013
LEEDuser Member
3220 Thumbs Up

Future development in the same LPB

Hi folks,

In need of some light on a review we received.

We have a multiple buldings Project. there are 4 LPBs inside of the LCB. One of this LPB contains a hardscapeHardscape consists of the inanimate elements of the building landscaping. Examples include pavement, roadways, stone walls, concrete paths and sidewalks, and concrete, brick, and tile patios. area that is being built now and a future hardscape area anticipated for expansion.

The review team asked us to "ensure that future development is included in the calculations". However, this portion of the site will not be built anytime soon, so we have no idea of how big it is and what type of material will be used. Is just a MASTER plan, not a final Project.

How are we supposed to include this area in the calculations to satisfactorignly respond to the review comment? As of today, 98% of the built hardscape complies with the credit via SRI/open grid/shade, and the credit asks for 50%. I don't know what the review team means by "include the future expansion in the calculations".

And, to make it even more confusing, the MPR#3 says about SSc7.1, page 17: "Strategies that contributed to an earlier LEED project's capture of this credit may not be used by a later Project. If there is new development during a later phase on the same land (such as new sidewalk), then strategies associated with that new feature may cotribute to the capture of the credit for that phase".

To sum up: there is the hardscape already built and there is the hardscape that will be built in the future within the same LPB. The review team is aking us to include the future hardscape in the calculations of the newly built hardscape. However, if we include the future hardscape our percentage may drop from 98% to less than 50%, preventing credit compliance, because there is not enough information about the future expansion yet, is just a general area and we don't know what types of material will be used there. How do we respond to this review comment?

Thanks

1
2
0
Marcio Alberto Casado Pereira Sep 30 2013 LEEDuser Member 3220 Thumbs Up

Thanks E H. I could read your response from my email, but can't see it here...so here's what I got from you:

"Greetings, There is a new comment by E H on the LEEDuser forum: NC 2009 SSc7.1: Heat Island Effect—Nonroof:
Any space alotted for future development (buildings, roads, parking, etc.) should count as hardscapeHardscape consists of the inanimate elements of the building landscaping. Examples include pavement, roadways, stone walls, concrete paths and sidewalks, and concrete, brick, and tile patios. towards your open space calculation. If the future development area changes significantly as more project's come online within the campus (enough that it is obviously different from the original master plan and changes the open space calculation), you may have to re-submit the credit for review.
Future development potential is not exempt from this credit. If there is potential for an area to be built on, and the owner wishes to reserve that area for potential development, it must be counted as hardscape (or not counted as open space).
Unfortunately, it sounds like this might be a problem for your project. But, if you can't guarantee an area will be preserved as open space for the life of the building, then it cannot be counted as open space to achieve the credit."

However, my concern is not about the open space areaOpen space area is usually defined by local zoning requirements. If local zoning requirements do not clearly define open space, it is defined for the purposes of LEED calculations as the property area minus the development footprint; it must be vegetated and pervious, with exceptions only as noted in the credit requirements section. Only ground areas are calculated as open space. For projects located in urban areas that earn a Development Density and Community Connectivity credit, open space also includes nonvehicular, pedestrian-oriented hardscape spaces.. The future develoment area has been considered for calculations under the credit SSc5.2, so we are fine with that one. My question is regarding the SRI of the future hardscape. The construction material to be used for the future development has not been specified yet. If we include the future area in the calculation by summing up the future area plus the newly built hardscape area and have a letter from the owner committing to use compliant material to the future hardscape would that be a satisfactory response?

Thanks

2
2
0
E H Sustainability Architect Sep 30 2013 LEEDuser Member 2958 Thumbs Up

yeah, I just realized I was providing comments to the wrong credit . . .

I am not sure how to address your issue with SSc7.1, especially without understanding your master plan and how the building is sited. Are you using the campus approach with a master site and individual building?

It seems like you could fight the comment by stating that the future hardscapeHardscape consists of the inanimate elements of the building landscaping. Examples include pavement, roadways, stone walls, concrete paths and sidewalks, and concrete, brick, and tile patios. is outside the scope of the LEED project and will be a part of a future building separate from the LEED building. . . (but reviewers don't always go for that argument). This simplest way to deal with it might be to provide a commitment letter from the owner stating the all future hardscape will be SRI compliant or open grid, etc (and be as specific as you can).

Unfortunately, this seems like one of those projects where a different reviewer might have a different understanding of the credit requirements, and would not require you to include future development areas. That being said, this might be a good candidate for an LI, as I'm sure there will be other projects will encounter this issue and would benefit from an official response from USGBC for project teams and GBCI reviewers to use.

Post a Reply
0
0
Marcio Alberto Casado Pereira
Sep 27 2013
LEEDuser Member
3220 Thumbs Up

Future development

We got a review on this credit that we don't know how to address...

We are working on a multiple building Project and there is an area within the site designated for future expansion of this industrial plant. The review comment ask us to ensure that "future development is included in the calculations". A few things:
1) As of today the owner only has an estimative of the area that will be developed. So how can we calculate a percentage of a number we doesn't have?
2) Would a letter from the owner commiting to comply with this credit in the future expansion area be enough to justify the review comments?

Thanks

1
1
0
Crissy Tsai Sustainability Coordinator, Webcor Builders Oct 08 2013 LEEDuser Expert 902 Thumbs Up

Marcio,

I would used an estimate of the area that will be developed and state that the rest of the site area will comply with the credit requirements for SSc7.1. The letter should be on the owner's letterhead and signed by the owner.

Post a Reply
0
0
Pat Thomas Principal Sustainability Services
Sep 10 2013
LEEDuser Member
368 Thumbs Up

Open Top Parking Garage - not SRI compliant

In Option 2 birds-eye view, you note that an Open Top Parking Level is not required to be SRI-compliant. I cannot find where this is specifically designated ?? Can you direct me ??
Thanks.

1
5
0
E H Sustainability Architect Sep 10 2013 LEEDuser Member 2958 Thumbs Up

The way I have approached this . . . If you have a multi-level garage whose roof does not meet the SRI requirements, then the parking level immediately below the roof does not count as "covered parking". But, all levels below that top level do count as covered parking.

Any other thoughts . . .

2
5
0
Pat Thomas Principal, Sustainability Services Sep 10 2013 LEEDuser Member 368 Thumbs Up

Thanks for the prompt response & that is very logical. However it isn't what the explanation above says, is it ?? 'an open top parking level is not required to be SRI-compliant'. ?? Can anyone tell me where this is in the reference guide, addenda, LIs, etc. This project has a 3 story open top parking garage & the top parking level is not SRI-compliant. Appreciate it.

3
5
0
Tristan Roberts LEED AP BD+C, Editorial Director – LEEDuser, BuildingGreen, Inc. Sep 17 2013 LEEDuser Moderator

I think the statement we offer above on LEEDuser is referring to a parking garage with no roof, and in which the top level is not SRI-compliant.

If more than 50% of the parking is covered (thus, the top level does not count), then you can earn the credit via Option 2, even if that top level is not SRI compliant. This is simply a logical interpretation of the credit requirement.

4
5
0
Pat Thomas Principal, Sustainability Services Sep 18 2013 LEEDuser Member 368 Thumbs Up

Thanks Tristan. We will have a GBCI 'work session' at Greenbuild & validate this interpretation. If they do not agree, I'll update the post.

5
5
0
deborah lucking associate, fentress architects Sep 23 2013 LEEDuser Member 1307 Thumbs Up

Pat,
check out Footnote #3 in the Credit Language on the USGBC site: http://www.usgbc.org/node/1731021?return=/credits/new-construction/v2009
"For the purposes of this credit, under cover parking is defined as parking underground, under desk (sic), under roof, or under a building."
I would take this to mean that the parking spaces on the top deck not "under cover" is excluded from the 50% of spaces covered.

Post a Reply
0
0
Carly Ruggieri Senior Sustainability Consultant Steven Winter Associates, Inc.
Aug 28 2013
Guest
985 Thumbs Up

At-Grade Plaza w/ Cellar Space Below

My project has a cellar level that extends beyond the building footprintBuilding footprint is the area on a project site used by the building structure, defined by the perimeter of the building plan. Parking lots, parking garages, landscapes, and other nonbuilding facilities are not included in the building footprint.. At street-level, there will be a plaza constructed over this portion of the cellar level which includes vegetation, pavers and seating - this plaza is 100% of the project's non-roof areaRoof area is the area of the uppermost surface of the building which covers enclosed Gross Floor Area, as measured when projected onto a flat, horizontal surface (i.e. as seen in Roof Plan view). ‘Roofs’, or portions of roofs, covering unenclosed areas (e.g. roofs over porches and open covered parking structures) are not included in the areas used to evaluate compliance with SSc7.2, though they may be applicable to SSc7.1.. However, I just want to verify that this street-level plaza will not somehow fall into the 'roof' category since there will be conditioned corridors, storage and IT room in the cellar below. Logically, this exterior plaza is non-roof but I just don't want to run into any complications with LEED definitions - all of the LEED Interpretations I found only addressed below-grade parking but did not specify what to do with cellar spaces covered by sidewalk/landscape/etc. Thanks in advance for sharing any experience or input on this!

1
1
0
Crissy Tsai Sustainability Coordinator, Webcor Builders Sep 03 2013 LEEDuser Expert 902 Thumbs Up

Carly,

I do not think you should have an issue with reviewers thinking the cellar space covered an at grade plaza is a roof. I submitted a project that had a at grade plaza covering an athetic performance center. Make sure to provide a clear narrative when documenting the credit, so the reviewers completely understand project conditions.

Post a Reply
0
0
Sara Rosenthal
Jul 16 2013
LEEDuser Member
33 Thumbs Up

Decomposed Granite

Do I need to include the areas on the site which are covered with decomposed granite in my hardscapeHardscape consists of the inanimate elements of the building landscaping. Examples include pavement, roadways, stone walls, concrete paths and sidewalks, and concrete, brick, and tile patios. calculation?

1
1
0
Tristan Roberts LEED AP BD+C, Editorial Director – LEEDuser, BuildingGreen, Inc. Jul 16 2013 LEEDuser Moderator

Sara, in my opinion, this is a gray area in LEED. The second-to-last FAQ above addresses this in greater detail.

Post a Reply
0
0
Nicole Kimoto Architects Pacific, Inc.
Jul 12 2013
LEEDuser Member
445 Thumbs Up

Mechanical enclosure non-roof?

Can we include the concrete paving provided in our project as part of the non-roof areaRoof area is the area of the uppermost surface of the building which covers enclosed Gross Floor Area, as measured when projected onto a flat, horizontal surface (i.e. as seen in Roof Plan view). ‘Roofs’, or portions of roofs, covering unenclosed areas (e.g. roofs over porches and open covered parking structures) are not included in the areas used to evaluate compliance with SSc7.2, though they may be applicable to SSc7.1.?

1
1
0
Crissy Tsai Sustainability Coordinator, Webcor Builders Jul 15 2013 LEEDuser Expert 902 Thumbs Up

Nicole,

Yes, you will need to include all concrete paving provided in the LEED project boundary as the non-roof areaRoof area is the area of the uppermost surface of the building which covers enclosed Gross Floor Area, as measured when projected onto a flat, horizontal surface (i.e. as seen in Roof Plan view). ‘Roofs’, or portions of roofs, covering unenclosed areas (e.g. roofs over porches and open covered parking structures) are not included in the areas used to evaluate compliance with SSc7.2, though they may be applicable to SSc7.1..

Post a Reply
0
0
Sean Hogan LEED AP RKD Architects
May 24 2013
LEEDuser Member
148 Thumbs Up

Surface finish on Concrete Yards slab pursuing SSc7.1

Hi,

Smoother finish looks better than brushed finish on concrete, Are there any SRI issues to consider in deciding on the final texture, or is that all a function of the (initial) concrete colour – a finish that gathers dirt is going to lose a good deal of its reflectance value pretty fast.

Sean

1
2
0
Crissy Tsai Sustainability Coordinator, Webcor Builders May 24 2013 LEEDuser Expert 902 Thumbs Up

Hi Sean,

I've never seen any issue with the final texture of the hard surface. To document the credit, the reviewer typically is looking on the SRI of the concrete based on the color.

Regards,
Crissy

2
2
0
Sean Hogan LEED AP, RKD Architects Jun 11 2013 LEEDuser Member 148 Thumbs Up

Thanks Crissy, as I thought but best to check.

Post a Reply
0
0
Heather Holdridge Sustainability Coordinator Lake/Flato Architects
May 20 2013
LEEDuser Member
1286 Thumbs Up

Rainwater collection

I'm assuming the area used for a rainwater cistern within a LEED project boundary is not factored anywhere in the template for this credit -- Is this correct?

1
1
0
Crissy Tsai Sustainability Coordinator, Webcor Builders May 24 2013 LEEDuser Expert 902 Thumbs Up

Heather,

I would say your assumption is correct, but I haven't worked on a project with a rainwater cistern yet.

Best,
Crissy

Post a Reply
0
0
Breffni O'Rourke Sustainable Knowledge Technician HOK
Apr 23 2013
LEEDuser Member
12 Thumbs Up

Can an Off-site parking garage be used to achieve credit?

We are examining a project that will include a multi-story parking garage that will not be within the LEED boundary. The garage will be constructed (likely concurrently) to serve the certified building and meets the intent and requirements of SSc7.1.
Does anyone know if using the garage would be an acceptable approach to achieving the credit?

I know the credit does say to consider the number of spaces within the project boundary which this is not. However, other parking credits such as SSc4.4 are asked to consider off-site parking in their calculations:

"Although its applicability to LEED 2009 has not been considered (it was issued for NC-v2.2, LEED InterpretationLEED Interpretations are official answers to technical inquiries about implementing LEED on a project. They help people understand how their projects can meet LEED requirements and provide clarity on existing options. LEED Interpretations are to be used by any project certifying under an applicable rating system. All project teams are required to adhere to all LEED Interpretations posted before their registration date. This also applies to other addenda. Adherence to rulings posted after a project registers is optional, but strongly encouraged. LEED Interpretations are published in a searchable database at usgbc.org. #2120 issued 5/23/08 states, “if there will be additional parking built as a result of the construction of the [project], even if this parking is off site, then the No New Parking option cannot be used.” (from LEEDuser SSc4.4)

If a project needs to consider the impact of newly constructed off-site parking for one credit, shouldn't it be considered for impact on other credits as well?

Thanks
Breffni

1
8
0
E H Sustainability Architect May 01 2013 LEEDuser Member 2958 Thumbs Up

I have the same question. Can off-site garage parking with compliant SRI roof meet the requirements of the credit?

2
8
0
Tristan Roberts LEED AP BD+C, Editorial Director – LEEDuser, BuildingGreen, Inc. May 01 2013 LEEDuser Moderator

Check the guidance under MPR3. The way I read it, you couldn't do this. Basically, this could be seen as cherry-picking an environmental benefit from a neighboring building for the benefit of earning a LEED credit. Another building could theoretically claim the same building's roof for its LEED credit.

Can you include the parking in the boundary?

3
8
0
Crissy Tsai Sustainability Coordinator, Webcor Builders May 01 2013 LEEDuser Expert 902 Thumbs Up

I would agree with Tristan on this. It does not seem likely you can include a neighboring building to meet the credit unless this is included in the project boundary and accounted for in all other credits.

4
8
0
E H Sustainability Architect May 01 2013 LEEDuser Member 2958 Thumbs Up

The LEED project is located on a campus, and the garage is existing and serves the whole campus . . .

5
8
0
Tristan Roberts LEED AP BD+C, Editorial Director – LEEDuser, BuildingGreen, Inc. May 01 2013 LEEDuser Moderator

E H, I don't think those facts change my advice: put it in the LEED boundary if you want to take credit for it.

 

6
8
0
Hernando Miranda Owner, Soltierra LLC May 01 2013 Guest 7205 Thumbs Up

For credits related to parking capacity, the amount of off-site parking should be included as part of the evaluation the Parking Capacity credit. But, for all other credits the parking features should not be included. Including the off-site parking helps prove you are not trying to hide parking by carefully excluding it from the official LEED boundary. This is the right way to do it, in my opinion, but the LEED reviewers follow review rules that allow excess parking to be hidden.

For a recent certified project we included the off-site parking in the calculations we received the following review comment.

"While projects are not required to include the area of the entire campus boundary owned by an entity for the calculations in this credit, it is noted for future submitals that when designating a LEED campus boundary for the purposes of documenting credits on a campus wide basis, that boundary must be consistent throughout the submittal. The LEED campus boundary delineated within credits such as SSc4.3 Alternative Transportation Low Emitting and Fuel Efficient Vehicles and SSc4.4 Alternative Transportation Parking Capacity is not consistent with the boundary used for the calculations in credit. Since compliance can be verified for all three buildings pursuing LEED Certification on-site, credit compliance is not affected at this time."

For the project, only SSc4.4 included anything outside the LEED campus boundary. SSc4.3 was entirely within the LEED campus boundary.

What the review comment is stating is that is expected that all off-site, and outside the LEED campus boundary, including employee designated parking, will be excluded from the LEED documentation. This is not the correct answer, in my opinion, but it is a LEED review rule that creates a loophole by allowing parking capacity which might exceed the LEED requirements to be excluded, and allowing the credit to be earned.

7
8
0
Lauren Sparandara Sustainability Manager, Google May 01 2013 LEEDuser Expert 15280 Thumbs Up

I would also suggest taking a look at the AGMBC to see if you would like to use a Campus approach to your documentation.

8
8
0
E H Sustainability Architect May 01 2013 LEEDuser Member 2958 Thumbs Up

Yes, I will definitely look into Campus Approach. It would make sense for a number of credits. And, extending the boundary of the individual building will definitely look like "gerrymandering." Thanks for all the feedback!

Post a Reply
0
0
Amar Nath
Apr 10 2013
Guest
20 Thumbs Up

heat isalnd effect because of wall

Hi,

I am just curious to know wether LEED accounts for heat island effectHeat island effect refers to the absorption of heat by hardscapes, such as dark, nonreflective pavement and buildings, and its radiation to surrounding areas. Other sources may include vehicle exhaust, air-conditioners, and street equipment. Reduced airflow because of tall buildings and narrow streets exacerbate the effect. that takes place because of wall just like roof ? If not then any logical reason?

1
1
0
Tristan Roberts LEED AP BD+C, Editorial Director – LEEDuser, BuildingGreen, Inc. Apr 10 2013 LEEDuser Moderator

Amar, it does not. Walls receive less sunlight and thus have less of an effect on heat islands. USGBC looked at adding walls to consideration in LEED v4, but I don't remember where the current draft stands on that.

Post a Reply
0
0
Erin Nuckols Sustainable Building Associate Institute for the Built Environment
Apr 09 2013
Guest
134 Thumbs Up

Gravel

Is there a type of gravel material that could meet the SRI requirements? Or is there a way to make gravel material meet the SRI requirements? (We are utilizing gravel for a roadway)

1
3
0
Tristan Roberts LEED AP BD+C, Editorial Director – LEEDuser, BuildingGreen, Inc. May 09 2013 LEEDuser Moderator

Erin, I couldn't say for sure one way or another. I have seen people ask about gravel on this forum, but I don't recall anyone having an SRI number. I would think that light-colored gravel would have a shot, but between getting that locally and having it tested for SRI, it might be an uphill battle.

More replies to "Gravel" on next page...

Start a new LEED comment thread

Sep 02 2014
Type the characters you see in this picture. (verify using audio)
Type the characters you see in the picture above; if you can't read them, submit the form and a new image will be generated. Not case sensitive.

Copyright 2014 – BuildingGreen, Inc.