We have a project with an office tower (white TPO) and a detached 2-story annex (mod-bit BUR). The annex is 7% of the total building area.

The definition for roof area indicates that only the roof area directly above the Gross Square Footage should be used for the Option 1 - 75% calculation.

Upper floors of building are utilized as hotel and lower floors are utilized as office. Owners are diffrent. Only the office is going to certified under LEED EB except hotel.

I have a building that has in the most part of their roof, a floating tile paving, that creates an air-chamber between the slab of the roof and the tilies of the paving.

In my understanding all roof areas that are not counted for heat island effect - non roof should be counted for heat island effect - roof credit. Is that correct?

Am I missing something in this. In our project, we have about 60,000 SF of roof area with 0.85 Solar Reflectance, 0.89 Thermal Emittance, & calculated SRI of 107.1.

If solar panels on our building‘s roof are serving another building‘s energy needs, can we still exclude these solar panels from calculations as mechanical equipment?