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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>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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