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Credit language straight from USGBC
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- On the jobsite without your bulky LEED Reference Guide? Check up on the credit language details here.
- Credit language content is used by permission of the U.S. Green Building Council.
- Rating System Schools 2009Schools
- Rating System SSSustainable Sites
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Rating System
SSc7.1Heat Island Effect—Nonroof
- SSp1Construction Activity Pollution Prevention
- SSp2Environmental Site Assessment
- SSc1Site Selection
- SSc2Development Density and Community Connectivity
- SSc3Brownfield Redevelopment
- SSc4.1Alternative Transportation—Public Transportation Access
- SSc4.2Alternative Transportation—Bicycle Storage and Changing Rooms
- SSc4.3Alternative Transportation—Low-Emitting and Fuel-Efficient Vehicles
- SSc4.4Alternative Transportation—Parking Capacity
- SSc5.1Site Development—Protect or Restore Habitat
- SSc5.2Site Development—Maximize Open Space
- SSc6.1Stormwater Design—Quantity Control
- SSc6.2Stormwater Design—Quality Control
- SSc7.1Heat Island Effect—Nonroof
- SSc7.2Heat Island Effect—Roof
- SSc8Light Pollution Reduction
- SSc9Site Master Plan
- SSc10Joint Use of Facilities
Schools 2009 SSc7.1: Heat Island Effect—Nonroof
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6 Comments
Parking Lot Tree Canopy Coverage
We have been attempting to achieve this credit with tree canopy coverage in our parking lot. Two questions:
1.) What counts as 'shade' - 50% coverage per parking space?
2.) At what time of day/ year is shade measured from? (I have come across an old project that leads me to believe it's measured on the summer solstice when the sun is at the highest point in the sky.)
Rebecca, the calculations in the NC version 2.2 Reference Guide state that shade coverage "shall be calculated at 10am, noon, and 3 pm. The arithmetic mean of these three values will be used as the effective shaded area." The v2.2 credit doesn't specify the date for which to calculate these areas, but my understanding is to use the summer solstice, June 21st. (That's made clear in the v2009 credit language.)
In terms of what % constitutes shade, it's measured in terms of the whole parking area—50% or more must be shaded. So a single space shaded at 50% would only could at 50% toward the necessary total.
Existing Roof - to test or not?
Hi, I'm using option 2 and am placing half of the parking under cover w/an SRIThe solar reflectance index (SRI) is a measure of a material's ability to reject solar heat, as shown by a small temperature rise. Standard black (reflectance 0.05, emittance 0.90) is 0 and standard white (reflectance 0.80, emittance 0.90) is 100. For example, a standard black surface has a temperature rise of 90_F (50_C) in full sun, and a standard white surface has a temperature rise of 14.6_F (8.1_C). Once the maximum temperature rise of a given material has been computed, the SRI can be calculated by interpolating between the values for white and black. Materials with the highest SRI values are the coolest choices for paving. Because of the way SRI is defined, particularly hot materials can even take slightly negative values, and particularly cool materials can even exceed 100. > 29. There is an existing light colored modified bituminous roof in place; however I do not know the manufacturer. Do I need to have it tested and if so, how do I go about finding a laboratory?
Thanks,
Nicole
Yes, I would say you have to test it. I would try the yellow pages, Google, etc. for testing labs in your region.
Outdoor Track
Our school project has an outdoor track made of rubber. Is this considered a hardscape or can it count as open space?
Thanks
Sounds like it would be considered hardscape - the glossary of the BD&C Reference Guide defines open space as "vegetated and pervious." There are some exceptions, such as for projects in densely developed areas earning SSc2, so you'd want to look into those.
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