[Greenbuilding] embodied energy was Polyiso strength on roof

[conservation architect]

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.  

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.  

I can see the potential for eps plaster panels that could lend itself to reconfiguration and long life.  This is the Lego model.  

Eli 


From: ErgoDesk 
Sent: Tuesday, December 09, 2014 6:05 PM
To: Green Building 
Subject: Re: [Greenbuilding] embodied energy was Polyiso strength on roof

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. http://goo.gl/FMnYUz

-enjoy the info, just warning you upfront 

http://about.me/StyroHome



On Tue, Dec 9, 2014 at 11:33 AM, JOHN SALMEN <terrain at shaw.ca> wrote:

  Except the density thing and the economic  politics that don't set recycling requirements for paper in naRealistically cellulose insul is like 3%? Of insul  sakes. If that ‎ rose it would be more forests
  Sent from my BlackBerry 10 smartphone on the Rogers network.
        From: Alan Abrams
        Sent: Tuesday, December 9, 2014 09:35
        To: listserv Green Building new
        Reply To: Green Building
        Subject: Re: [Greenbuilding] embodied energy was Polyiso strength on roof 


  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.




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