National interest in energy conservation and efficiency is skyrocketing, and national policies and initiatives are following. For example, the International Code Council's International Energy Conservation Code and ASHRAE 90.1-2013, "Energy Standard for Buildings Except Low-Rise Residential Buildings," seek significant increases in energy savings in residential and commercial buildings; The American Institute of Architects has pledged to have net zero energy buildings by 2030; and President Obama's Better Buildings Initiative calls for commercial buildings to be 20 percent more energy-efficient. The list goes on.
In response, roof system designers, roofing contractors and property owners are finding innovative ways to improve their buildings' energy performances and efficiencies. Many find insulation offers a critically important way to make any building—whether residential or commercial—more energy-efficient.
The polyisocyanurate industry is taking strong action to improve the performance of its products and identify ways to accurately measure that enhanced performance. A crucial factor when choosing insulation, R-value measures insulation's resistance to heat flow. Architects, specifiers, building owners and roofing contractors expect R-values to accurately reflect insulation's long-term thermal resistance (LTTR).