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<p class=MsoNormal>Hello!<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>For Climate Zone 5, IECC requires a minimum insulation value
of R-13 + R-7.5 c.i. for a steel framed building. If the studs are 16” on
center, the thermal bridging degrades the batt R-value of 13 down to an
effective R-6 c.i. which bring the total insulation value to R-13.5 c.i. Currently,
I am reviewing a building with 2.5” of R-5 extruded polystyrene total an
insulation value of R-12.5 c.i. However, the building wall assembly exceeds the
‘Assembly Minimum’ of U-value 0.064. Since IECC 2009 is the
effective energy code of Massachusetts since June 30, 2010, is the insulation
assembly in agreement with the Minimum Envelope Requirements if the ‘Assembly
Maximum’ is exceeded? Any input will be much appreciated!<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:black'>Regards,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:black'>Janne
Kairento</span><o:p></o:p></p>
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