Forum discussion
NC-2009 SSc6.1: Stormwater Design—Quantity Control
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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Why do the requirements focus on 1-year and 2-year, 24-hour storms?
How can green roofs count as a stormwater control measure?
I have 100-year data—how do I convert to 2-year?
Are there special considerations for international projects?
What performance threshold do I need to achieve for an Exemplary Performance point?
Michael DeVuono
Regional Stormwater LeaderArcadis North America
LEEDuser Expert
186 thumbs up
September 5, 2013 - 10:25 am
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.