<div dir="ltr">Dense pack cellulose is definitely a significant means of achieving better air tightness, but not technically an air barrier.<div><br></div><div>On our deep energy retrofit of a 1900 farmhouse, we cut our air leakage in half when we installed the dense pack cellulose in our double-stud wall cavities, extended roof rafter cavities, and floor joist cavities. Air leakage went from ~4 ACH50 to 2, which we then dropped down to around 1.2 before we were done.</div><div><br></div><div>Rob</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Dec 10, 2014 at 11:03 AM, Reuben Deumling <span dir="ltr"><<a href="mailto:9watts@gmail.com" target="_blank">9watts@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><span class=""><div>"However,
fiberglass and cellulose are not air barriers."<br><br></div></span>Really? I thought dense pack cellulose was de facto also an air barrier. <br></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Dec 10, 2014 at 7:25 AM, conservation architect <span dir="ltr"><<a href="mailto:elitalking@rockbridge.net" target="_blank">elitalking@rockbridge.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div dir="ltr">
<div style="FONT-SIZE:10pt;FONT-FAMILY:'Arial';COLOR:#000000">
<div> </div>
<div><img title="image" style="BORDER-TOP:0px;BORDER-RIGHT:0px;BACKGROUND-IMAGE:none;BORDER-BOTTOM:0px;PADDING-TOP:0px;PADDING-LEFT:0px;BORDER-LEFT:0px;DISPLAY:inline;PADDING-RIGHT:0px" alt="image" src="cid:437A264A861D419F8D96FC0107F2909B@userHP" height="404" width="644" border="0"></div>
<div>This source from Ergo’s link seems pretty authoritative. I was
disappointed not the see eps on the list. It does have xps which I expect
to be much higher carbon footprint than eps because of the price. Still
looking for this comparison. I am surprised that fiberglass is so high. I
am not surprised that cellulose is so low. They compared these based on
R20 square foot. This is fair for conduction performance. However,
fiberglass and cellulose are not air barriers. Therefore, the improved
energy performance from this characteristic of the foam products is not
recognized in this evaluation. </div>
<div> </div>
<div>I was impressed by fire video of plaster eps room. The plaster
installation surely was the major factor in that result. It was still in place
after the fire. </div>
<div> </div>
<div>I can see the potential for eps plaster panels that could lend itself to
reconfiguration and long life. This is the Lego model. </div>
<div> </div>
<div>Eli </div>
<div> </div>
<div style="FONT-SIZE:small;TEXT-DECORATION:none;FONT-FAMILY:"Calibri";FONT-WEIGHT:normal;COLOR:#000000;FONT-STYLE:normal;DISPLAY:inline">
<div style="FONT:10pt tahoma">
<div> </div>
<div style="BACKGROUND:#f5f5f5">
<div><b>From:</b> <a title="ergodesk@gmail.com" href="mailto:ergodesk@gmail.com" target="_blank">ErgoDesk</a> </div>
<div><b>Sent:</b> Tuesday, December 09, 2014 6:05 PM</div><div><div>
<div><b>To:</b> <a title="greenbuilding@lists.bioenergylists.org" href="mailto:greenbuilding@lists.bioenergylists.org" target="_blank">Green Building</a> </div>
<div><b>Subject:</b> Re: [Greenbuilding] embodied energy was Polyiso strength on
roof</div></div></div></div></div>
<div> </div></div>
<div style="FONT-SIZE:small;TEXT-DECORATION:none;FONT-FAMILY:"Calibri";FONT-WEIGHT:normal;COLOR:#000000;FONT-STYLE:normal;DISPLAY:inline"><div><div>
<div dir="ltr">
<div class="gmail_default" style="FONT-FAMILY:'arial narrow',sans-serif">Ok you
got me on this one, besides I'm busy trying to save the world, but if you want
to waste time nickel and dimming yourselves on the constant changing numbers
here they are. <a href="http://goo.gl/FMnYUz" target="_blank">http://goo.gl/FMnYUz</a></div>
<div class="gmail_default" style="FONT-FAMILY:'arial narrow',sans-serif"> </div>
<div class="gmail_default" style="FONT-FAMILY:'arial narrow',sans-serif">-enjoy
the info, just warning you upfront </div></div>
<div class="gmail_extra">
<div> </div>
<div>
<div>
<div dir="ltr">
<div><a href="http://about.me/StyroHome" target="_blank"><span></span><span></span>http://about.me/StyroHome</a><br></div>
<div> </div></div></div></div>
<div> </div>
<div class="gmail_quote">On Tue, Dec 9, 2014 at 11:33 AM, JOHN SALMEN <span dir="ltr"><<a href="mailto:terrain@shaw.ca" target="_blank">terrain@shaw.ca</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="PADDING-LEFT:1ex;MARGIN:0px 0px 0px 0.8ex;BORDER-LEFT:#ccc 1px solid">
<div style="BACKGROUND-COLOR:rgb(255,255,255)">
<div style="FONT-FAMILY:calibri,'Slate Pro',sans-serif;WIDTH:100%;COLOR:rgb(31,73,125);BACKGROUND-COLOR:rgb(255,255,255)">Except
the density thing and the economic politics that don't set recycling
requirements for paper in na</div>
<div style="FONT-FAMILY:calibri,'Slate Pro',sans-serif;WIDTH:100%;COLOR:rgb(31,73,125);BACKGROUND-COLOR:rgb(255,255,255)">Realistically
cellulose insul is like 3%? Of insul sakes. If that rose it would be
more forests</div>
<div style="FONT-FAMILY:calibri,'Slate Pro',sans-serif;WIDTH:100%;COLOR:rgb(31,73,125);BACKGROUND-COLOR:rgb(255,255,255)"></div>
<div style="FONT-FAMILY:calibri,'Slate Pro',sans-serif;COLOR:rgb(31,73,125);BACKGROUND-COLOR:rgb(255,255,255)">Sent
from my BlackBerry 10 smartphone on the Rogers network.</div>
<table style="COLOR:#000000;BORDER-SPACING:0px;BACKGROUND-COLOR:white" width="100%">
<tbody>
<tr>
<td style="BACKGROUND-COLOR:rgb(255,255,255)" colspan="2">
<div style="FONT-SIZE:10pt;BORDER-TOP:rgb(181,196,223) 1pt solid;FONT-FAMILY:tahoma,'BB Alpha Sans','Slate Pro';BORDER-BOTTOM-STYLE:none;PADDING-BOTTOM:0in;PADDING-TOP:3pt;BORDER-RIGHT-STYLE:none;PADDING-LEFT:0in;BORDER-LEFT-STYLE:none;PADDING-RIGHT:0in">
<div><b>From: </b>Alan Abrams</div>
<div><b>Sent: </b>Tuesday, December 9, 2014 09:35</div>
<div><b>To: </b>listserv Green Building new</div>
<div><b>Reply To: </b>Green Building</div>
<div><b>Subject: </b>Re: [Greenbuilding] embodied energy was Polyiso
strength on roof</div></div></td></tr></tbody></table><span>
<div style="BORDER-TOP:rgb(186,188,209) 1pt solid;BORDER-BOTTOM-STYLE:none;BORDER-RIGHT-STYLE:none;BORDER-LEFT-STYLE:none;BACKGROUND-COLOR:rgb(255,255,255)"></div>
<div> </div>
<div>
<p dir="ltr">John...assuming your assessment is accurate, and that any batch of
cellulose has had at least one go-round as Krauthammer columns, then shouldn't
the EE value be halved? If so, then it's still high, but more competitive
against
EPS.</p><br></div></span></div><br>_______________________________________________<br>Greenbuilding
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</div></div><p>
</p><hr><span>
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