ASHRAE Standard 90.1, Section 5.8.1.5, is amended to read:
5.8.1.5 Substantial contact. Insulation shall be installed in a permanent manner and in substantial contact with either the air barrier materials or building element making up the interior surface in accordance with manufacturer's recommendations for the framing system used. Exposed flexible batt insulation installed in floor cavities and walls shall be supported in a permanent manner by supports no greater than 24 inches on center.
Exception: Insulation materials that rely on air spaces adjacent to reflective surfaces for their rated performance.
33 SR 1473
June 17, 2009
Official Publication of the State of Minnesota
Revisor of Statutes