Has anyone ever used the aged or 3 - year solar reflectance value instead of the the initial reflectance? The shingle we are considering for a job does not meet the SRI value of 29 initially, but does after 3 years. Other shingles start with an SRI of 29 and get lower after three years. It seems it would make more sense to use the three-year value than the initial value, but the question still stands whether a shingle has to be compliant on day one and at day 1096. Any thoughts?

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Tristan Roberts

Representative

Vermont House of Representatives

LEEDuser Expert

7780 thumbs up

Fri, 09/02/2011 - 14:10

Sonrisa, for LEED-NC the general practice is to use the new values. I am not sure why this is so, especially when EBOM uses aged values and all new buildings become existing buildings very soon.I think you could try to get this approved, and the logic makes sense, but it may be turned down, since LEED does aim to use the same measuring stick for all projects, even if that measuring stick is sometimes a little funky.

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