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FAQs about SSc6.1 :

Why do the requirements focus on 1-year and 2-year, 24-hour storms?

Why include the 1-year storm in the credit requirements? Won't management practices for the 2-year storm be effective?

How can green roofs count as a stormwater control measure?

How can I achieve compliance if my project's stormwater control measures are outside the LEED project boundary?

I have 100-year data—how do I convert to 2-year?

Is it an acceptable strategy to capture the rainwater into tanks and discharge it into the public sewers after the rainstorm reducing the peak discharge?

Are there special considerations for international projects?

What performance threshold do I need to achieve for an Exemplary Performance point?

The calculations for this credit are always a headache! While our projects are usually awarded the credit, the equations in the LEED Reference Guide are helpful mostly for sizing a reservoir or cistern, but don't help you get to the final results. Does US

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Forum discussion

NC-2009 SSc6.1:Stormwater Design—Quantity Control

Green roof deck

mariela garate

Architect

Green Building Council Chile

LEEDuser Basic Member

1 thumbs up

August 27, 2013

Hi, We are willing to use an innovative type of green roof that's based on compacted plastic waste board and textile (1,3cms thickness + textile). This substrate replaces the need of soil. Can this count for Storm water credits, quantity and quality? As it has vegetation, that can grow Sedums and grass...

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Michael DeVuono

Regional Stormwater Leader

Arcadis North America

LEEDuser Expert

144 thumbs up

Thu, 09/05/2013 - 14:25

I would take a CN credit for the green roof to reduce your overall peak rate and runoff volume totals. A green roof is not really a water quality measure though, and I'd be willing to bet the pollutant load is very similar to that of a roof.

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