Forum discussion
NC-2009 SSc7.2: Heat Island Effect—Roof
I apologize if this is a repeat comment. I tried posting it once before, but when I went back to the forum, I did not see my comment posted.
The manufacturers color charts for the roofing we are using do not include a valuefor Emissivity. They do however include SRI and Reflectance values. The credit form requires a value for Emissivity. The Cool Roof Rating Council does not include this specific manufacturer.What am I supposed to do here?
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We don't know the SRI value of some roofing materials we are using. What should we do?
Do balconies and terraces need to be counted towards the roof square footage?
How does one calculate the square footage of a pitched roof?
Kathryn West
LEED AP BD+C, O+M, Green Globes ProfessionalJLL
154 thumbs up
July 31, 2015 - 11:08 am
You can just enter the SRI.
The SRI is a product of the emissivity and reflectance.
You need to fill in the total roof area to have the percent compliance show up.
No need to enter the reflectance and emittance if you've already entered the SRI.