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<p class=MsoNormal><span style='color:#1F497D'>Icynene is hot stuff because it’s
also an air barrier.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>I reckon if you define an
appropriate R-value for your icynene/joist layer and another continuous layer
for anything beyond, you should be able to account for the air barrier seal by
ensuring there’s zero infiltration through that construction. Infiltration
is handled at the space and/or construction levels depending on the method you’re
using to define it… best I can say is to look into it.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Maybe I’m underthinking it,
but I think that’s all you should need to do to demonstrate a difference
against batt – pay attention to you infiltration inputs.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>~Nick<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span style='color:#1F497D'><img width=119 height=37
id="Picture_x0020_1" src="cid:image001.jpg@01CB6C57.49759BB0"
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<p class=MsoNormal><b><span style='font-family:"Stylus BT","sans-serif";
color:#2D4D5E'><o:p> </o:p></span></b></p>
<p class=MsoNormal><b><span style='font-family:"Stylus BT","sans-serif";
color:#2D4D5E'>NICK CATON, E.I.T.</span></b><b><span style='font-size:12.0pt;
font-family:"Stylus BT","sans-serif";color:#2D4D5E'><o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:7.5pt;color:#CC9900'>PROJECT ENGINEER</span><span
style='font-size:7.5pt;font-family:"Times New Roman","serif";color:#CC9900'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#2D4D5E'>25501 west
valley parkway<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#2D4D5E'>olathe ks 66061<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#2D4D5E'>direct 913
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<p class=MsoNormal><span style='font-size:10.0pt;color:#2D4D5E'>fax 913
345.0617<o:p></o:p></span></p>
<p class=MsoNormal><i><span style='font-size:10.0pt;color:#2D4D5E'>Check out
our new web-site @ </span></i><span style='color:#1F497D'><a
href="www.smithboucher.com" title="blocked::www.smithboucher.com"><span
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style='font-size:10.0pt;color:blue'> </span></u><span style='color:#1F497D'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Joe
Snider<br>
<b>Sent:</b> Friday, October 15, 2010 10:41 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] icynene spray foam<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Does anyone know how to adjust for icynene spreay foam
insulation in a sealed attic space – closest option seems to be to select
R-19 batt on the underside of the roof deck, but this isn’t very accurate
because icynene in a sealed attic provides a significantly better performance
than just R-19 on underside of pitched roof?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Joe Snider<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:8.5pt;font-family:"Arial","sans-serif";
color:#948A54'>---<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:#948A54'>Joe Snider, AIA, LEED AP</span><span style='font-size:9.0pt;
font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:8.5pt;font-family:"Arial","sans-serif";
color:#948A54'><o:p> </o:p></span></b></p>
<p class=MsoNormal><b><span style='font-size:8.5pt;font-family:"Arial","sans-serif";
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<p class=MsoNormal><b><i><span style='font-size:8.5pt;font-family:"Arial","sans-serif";
color:#948A54'>high performance sustainable structures</span></i></b><b><i><span
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<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#948A54'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
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<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
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<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
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<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
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<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
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"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
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