Impact of Advancements in Model Energy Codes: What's the Effect on Insulation?
The Construction Specifier, Jan. 2014, by Jared O. Blum.
and click or scroll to page 66.
"In response to a national interest in, and policies for, conservation of energy, model energy codes are striving to advance the way commercial and residential building envelopes are insulated. The effect on how design professionals specify materials for thermal management will be substantial.