<div dir="ltr">I found the post "comparing 8 cold climate walls" on Dec 4 illuminating. Better to compare total lifecycle greenhouse gas emissions of a house using a specific wall (or roof) assembly, which includes the EE........................Norbert<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Dec 9, 2014 at 10:49 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="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div link="blue" vlink="purple" lang="EN-CA"><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black">I’ve tried to work with embodied energy figures in design and it is really difficult to get accurate units and make truly defensible decisions. Cellulose for example does not use the energy of making the newsprint or the wood it came from – and if it is removing paper from the recycled paper stream then it has to share that cost or simply be calculated as if it were a virgin material. EE of paper making is about 9300 btu/lb and the wood itself 7700 btu/lb so 17000 btu/lb. Total life cycle on paper has been calculated at 19400 btu/lb. <u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black">EE is calculated in terms of weight and cellulose can be 2-3x the density of foams so total density in a home can be significant in comparison to foam usage – so I’m not sure what is being greenwashed. This is not a defense of EPS just a comment on how difficult it is to determine the correct usage of a material. My suspicion is that mineral wool (given the absence of wool wool in the market) might be realistically the lower EE product but produces significant CO2. The following article supports rockwool as consuming less energy than paper wool in production <a href="http://www.rockwool.it/files/RW-IT/LCA/StudioComparativoLCA-2parte.pdf" target="_blank">http://www.rockwool.it/files/RW-IT/LCA/StudioComparativoLCA-2parte.pdf</a><u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black">Dogs breakfast<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black"><u></u> <u></u></span></p><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0cm 0cm 0cm"><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"" lang="EN-US">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"" lang="EN-US"> Greenbuilding [mailto:<a href="mailto:greenbuilding-bounces@lists.bioenergylists.org" target="_blank">greenbuilding-bounces@lists.bioenergylists.org</a>] <b>On Behalf Of </b>Gennaro Brooks-Church - Eco Brooklyn<br><b>Sent:</b> December-08-14 3:39 PM<br><b>To:</b> Green Building<br><b>Subject:</b> Re: [Greenbuilding] Polyiso strength on roof<u></u><u></u></span></p></div><p class="MsoNormal"><u></u> <u></u></p><div><p class="MsoNormal">Although the greenwashing on EPS is strong. It has huge amounts of embodied energy. I have not done the calcs (vs. wood and cellulose for example) but that very large amount of embodied energy needs to be mentioned and taken into account.<u></u><u></u></p><div><p class="MsoNormal" style="margin-left:15.0pt"><u></u><span style="font-size:10.0pt;font-family:Symbol;color:#666666"><span>·<span style="font:7.0pt "Times New Roman""> </span></span></span><u></u><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:#666666">Cellulose: 600 BTU<u></u><u></u></span></p><p class="MsoNormal" style="margin-left:15.0pt"><u></u><span style="font-size:10.0pt;font-family:Symbol;color:#666666"><span>·<span style="font:7.0pt "Times New Roman""> </span></span></span><u></u><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:#666666">Mineral wool: 2,980 BTU<u></u><u></u></span></p><p class="MsoNormal" style="margin-left:15.0pt"><u></u><span style="font-size:10.0pt;font-family:Symbol;color:#666666"><span>·<span style="font:7.0pt "Times New Roman""> </span></span></span><u></u><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:#666666">Fiberglass: 4,550 BTU<u></u><u></u></span></p><p class="MsoNormal" style="margin-left:15.0pt"><u></u><span style="font-size:10.0pt;font-family:Symbol;color:#666666"><span>·<span style="font:7.0pt "Times New Roman""> </span></span></span><u></u><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:#666666">Polyisocyanurate: 14,300 BTU<u></u><u></u></span></p><p class="MsoNormal" style="margin-left:15.0pt"><u></u><span style="font-size:10.0pt;font-family:Symbol;color:#666666"><span>·<span style="font:7.0pt "Times New Roman""> </span></span></span><u></u><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:#666666">EPS: 18,000 BTU<u></u><u></u></span></p></div></div><div><p class="MsoNormal"><br clear="all"><u></u><u></u></p><div><div><p class="MsoNormal">Gennaro Brooks-Church<br>Director, Eco Brooklyn Inc.<br>Cell: <a href="tel:1%20347%20244%203016" value="+13472443016" target="_blank">1 347 244 3016</a> USA<br><a href="http://www.EcoBrooklyn.com" target="_blank">www.EcoBrooklyn.com</a><br>22 2nd St; Brooklyn, NY 11231<u></u><u></u></p></div></div><p class="MsoNormal"><u></u> <u></u></p><div><p class="MsoNormal">On Mon, Dec 8, 2014 at 5:34 PM, Gennaro Brooks-Church - Eco Brooklyn <<a href="mailto:info@ecobrooklyn.com" target="_blank">info@ecobrooklyn.com</a>> wrote:<u></u><u></u></p><div><div><div><div><p class="MsoNormal">, ErgoDesk <<a href="mailto:ergodesk@gmail.com" target="_blank">ergodesk@gmail.com</a>> wrote:<u></u><u></u></p></div></div><div><blockquote style="border:none;border-left:solid #cccccc 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm"><div><div><p class="MsoNormal"><span style="font-size:18.0pt;font-family:"Arial Narrow","sans-serif"">Build the entire House from EPS <a href="http://goo.gl/bpmmmJ" target="_blank">http://goo.gl/bpmmmJ</a> <u></u><u></u></span></p></div></div></blockquote><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">I love this. Amazing. <u></u><u></u></p></div></div></div></div></div><p class="MsoNormal"><u></u> <u></u></p></div></div></div><br>_______________________________________________<br>
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