We are planning to have Sedum Roofing, partly to recieve credit 6.1. I have read a lot about vegetated roofing also to pursue credit 6.2.

The reference guide states that "90% of the avg annual rainfall is equivalent to treating the runoff from 1" of rainfall for a Humid Watershed (at least 40")." I don't understand how they arrived a

Could this credit be achieved if it were only proposed to treat the storm water runoff with a structural measure and not capture?

We have a client in a far northern climate that wants to achieve additional credit by installing rain gardens to handle runoff during the summer rainy season.

I am a little bit confused by this project and would like to have your advise.

Dear Leedusers, our project will install a retention tank which will collect storm water from the whole LEED area. The retention tank will provide water for flushing toilets and watering greenery.

I cant find clear cut for Stormwater Management Plan definition, i mean is it using both structural and non structural plans to achieve stormwater quality control?

use of lead metal downspouts in stormwater systems does LEED NC v2009 (v3) prohibit the use of lead based metals?

Hello, I would like to get confirmation on whether the following approach of demonstrating compliance with LEED requirements could be accepted or not.