Required R Value In Roof Ashrae 90 1

State only ma massachusetts 780 cmr chapter 13 5 r 30 state only mi michigan ashrae 90 1 2007 5 r 20 6 r 20 7 r 20 state only mn minnesota minnesota commercial state building code 6 r 30 7 r 35 please see disclaimer on back page. The r eference manual has been built off work originally done by comnet for the standard 90 1 2016 commercial building energy modeling guidelines and procedures and by cec for the nacm reference manual. Insulation professionals concerned with energy efficiency in buildings should be familiar with ashrae 90 1.

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