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.

Required r value in roof ashrae 90 1.

1 ashrae 90 1 2013 3 c407. Ashrae standard 90 1 energy standard for buildings except low rise. 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. Minimum insulation r value requirements non residential above roof deck.

Specific insulation requirements of section c402 2 thermal requirements of either. 5 1 3 clarifies roof insulation requirements differentiating between roof recovering on top of existing roof covering. Calculation method nacm reference manual. R value is for continuous insulation metal building wall r value insulation compressed between metal wall panels and the steel structure steel framed wall r value uncompressed insulation installed in the cavity between steel studs wood framed and other r value uncompressed insulation installed in the.

The values in these tables apply to buildings that are heated and or cooled as defined in 90 1. Or component performance alternative of section c402 1 5 roof solar reflectance and thermal emittance fenestration in building envelope. Ashrae 90 1 also provides prescriptive insulation values for semi heated buildings that are shown in these tables.