As codes tighten and energy costs skyrocket, there is significant and renewed interest in energy performance of buildings. Various associations, building codes and mandates all point towards higher energy performance and a significant reduction of greenhouse-gas-emitting fossil-fuel energy use in the coming years, resulting in carbon-neutral buildings in the future. This paper will examine the implications of these new codes and standards on increased R-value requirements for roofs and walls, air barriers for all new buildings, and improved mechanical-system efficiency.

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