Minn. R. agency 151, ch. 1323, pt. 1323.0553
ASHRAE 90.1 section 5.5.3.1 is amended to read as follows:
All roofs shall comply with the insulation values specified in Tables 5.5-0 through 5.5-8. Skylight curbs, mechanical curbs, and other roof curbs shall be insulated to the level of roofs with insulation entirely above deck or R-10, whichever is less.
Exception:
Historical buildings with roof slopes two units vertical in 12 units horizontal (2:12) or less. (Subsection 5.5.3.1.1 remains unchanged.)
ASHRAE 90.1 section 5.5.3.3 is amended to read as follows:
Below-grade walls shall have a rated R-value of insulation no less than the insulation values specified in Tables 5.5-0 through 5.5-8. Walls shall be insulated on the exterior side of the wall or integral to the wall.
Minn. R. agency 151, ch. 1323, pt. 1323.0553