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</o:shapelayout></xml><![endif]--></head><body lang=EN-CA link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>Not really true anymore. Plywood is superior in dealing with moisture (ability to withstand periodic wetting) but looking at some of the structural studies on osb it can perform equal or superior to plywood. Some of the span rated products in combination with engineered joist systems can substantially reduce the amount of material used. 19.2” centres on joists, engineered 2x4 studs can be used for 2 story construction at 24” centres allowing for more exterior insulation. With rainscreen osb is fine in my mind for exterior sheathing. Roof sheathing is the only place where I specify plywood (or anywhere exposed to potentially excessive humidity).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Greenbuilding [mailto:greenbuilding-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>Benjamin Pratt<br><b>Sent:</b> September-22-14 7:12 AM<br><b>To:</b> sanjay jain; Green Building<br><b>Subject:</b> Re: [Greenbuilding] New Type of Chipboard<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>OSB is almost always made from young trees. Plywood requires old growth trees. I agree that Plywood is superior to OSB in all applications, But OSB is acceptable in many cases and is much more sustainable.<o:p></o:p></p><div><p class=MsoNormal>The case for Corn board, (strawboard, etc), is if it is is a better utilization of the resource. It should also be noted that these are sequestering carbon which would otherwise be released if burned or allowed to decay. <o:p></o:p></p></div><div><p class=MsoNormal>Ben<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On Wed, Sep 17, 2014 at 1:03 PM, sanjay jain <<a href="mailto:sanjayjainuk@yahoo.co.uk" target="_blank">sanjayjainuk@yahoo.co.uk</a>> wrote:<o:p></o:p></p><div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Interesting - did not know that Corn Stover is reused in this way.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Helvetica","sans-serif";color:black'>Of course the vast majority of corn is fed to animals in factory farms. Animal agriculture being a significant contributor to climate change. Not sure if working it back in the soil makes a significant contribution to sustainability.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Helvetica","sans-serif";color:black'>~sanjay<o:p></o:p></span></p></div><div><div><p class=MsoNormal><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div></div><div><div><div><div><div class=MsoNormal align=center style='text-align:center;background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><hr size=1 width="100%" align=center></span></div></div><div><p class=MsoNormal style='background:white'><b><span style='font-family:"Arial","sans-serif";color:black'>From:</span></b><span style='font-family:"Arial","sans-serif";color:black'> John Straube <<a href="mailto:jfstraube@uwaterloo.ca" target="_blank">jfstraube@uwaterloo.ca</a>><br><b>To:</b> "<a href="mailto:sanjayjainuk@yahoo.co.uk" target="_blank">sanjayjainuk@yahoo.co.uk</a>" <<a href="mailto:sanjayjainuk@yahoo.co.uk" target="_blank">sanjayjainuk@yahoo.co.uk</a>>; Green Building <<a href="mailto:greenbuilding@lists.bioenergylists.org" target="_blank">greenbuilding@lists.bioenergylists.org</a>> <br><b>Sent:</b> Tuesday, September 16, 2014 5:07 PM<o:p></o:p></span></p></div><p class=MsoNormal style='background:white'><span style='font-family:"Arial","sans-serif";color:black'><br><b>Subject:</b> Re: [Greenbuilding] New Type of Chipboard</span><span style='font-family:"Helvetica","sans-serif";color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p><div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Calibri","sans-serif";color:#1F497D'>Corn stover is routinely worked back into the soil as it increases the resistance to erosion and increase organic structure and potash. <o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Calibri","sans-serif";color:#1F497D'>Farmers who don't look forward more than a year or two will bale up stover and there have been plans for using this for biofuels and other products but none that I know has ever been widely adopted. <o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Calibri","sans-serif";color:#1F497D'>OSB is often made from fast growing small trees like Aspen and the trees are fairly sustainable : no fertilizer or pesticides just good management and patience. Not a huge problem that needs to be solved.<o:p></o:p></span></p></div></div></div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div></div></div></div></div><p class=MsoNormal><br>_______________________________________________<br>Greenbuilding mailing list<br>to Send a Message to the list, use the email address<br><a href="mailto:Greenbuilding@bioenergylists.org">Greenbuilding@bioenergylists.org</a><br><br>to UNSUBSCRIBE or Change your List Settings use the web page<br><a href="http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org" target="_blank">http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org</a><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>