Forum discussion
NC-2009 SSc7.2: Heat Island Effect—Roof
We have a rooftop terrace exclusively for employees! Do we have to include the terrace in the roof area or it can be deducted?
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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?
Tristan Roberts
RepresentativeVermont House of Representatives
LEEDuser Expert
11478 thumbs up
November 22, 2012 - 10:55 pm
Simon, from what you describe, it sounds like it is part of the roof and should be included. Is there any reason you can think of to exclude it?
Simon Chantal
LEED CoordinatorMartin Roy & Associés
2 thumbs up
November 23, 2012 - 9:08 am
Since we exclude the area from mechanical equipment, i was wondering if we could do the same for a rooftop terrace with tables, chairs and BBQ (except during winter). It would by difficult to evaluate the SRI of these objects. But any way, we finally included the terrace in the calculation. Thank you Tristan!
Tristan Roberts
RepresentativeVermont House of Representatives
LEEDuser Expert
11478 thumbs up
November 23, 2012 - 10:01 am
Simon, I wouldn't include the tables and chairs, etc., in your SRI calcs, but the terrace surface should be included.
renee jimenez
principalmnk architects
13 thumbs up
January 4, 2013 - 7:43 pm
I have a similar question the definition of Roof Area is as follows with this definition in mind and a roof terrace that is an unenclosed area with a metal roof over it do I include the area of the terrace floor or the metal roof covering or neither?
Roof area - is the area of the uppermost surface of the building which covers enclosed Gross Floor Area, as measured when projected onto a flat, horizontal surface (i.e. as seen in Roof Plan view). ‘Roofs’, or portions of roofs, covering unenclosed areas (e.g. roofs over porches and open covered parking structures) are not included in the areas used to evaluate compliance with SSc7.2, though they may be applicable to SSc7.1.
samala hartley
3 thumbs up
May 30, 2013 - 5:53 pm
Tristan - can I suggest a reason to exclude a roof deck, or revise how to think about it?
We have a residential high rise with a rooftop pool, which is surrounded by wood deck. As this surface is being used differently than the intent of a rooftop. Could we consider applying the SSc7.1 SRI requirement of >29 to this surface in lieu of the SSc7.2 requirement of >78? The higher reflectivity would be uncomfortable for the users at the pool.
Just a different way to think about it - your thoughts?