[GSBN] Decrement factor of SB walls

[strawnet at aol.com]

 Ken, Polly Cooper and Jennifer Rennick's chapter that John mention's in that Wiley book - Alternative Construction: Contemporary Natural Building Methods, has a lot of information on this though they don't use the term "decrement." They talk about this issue with straw and other types of wall systems and go into considerable detail. I would get in touch with them and see what they have to say. 

David Eisenberg

 

 

-----Original Message-----
From: Laura Bartels <laura at greenweaverinc.com>
To: Global Straw Building Network <GSBN at sustainablesources.com>
Sent: Mon, Nov 28, 2011 3:40 pm
Subject: Re: [GSBN] Decrement factor of SB walls


Hi Martin,
Without going back to the details, I could be mistaken, but it seems that a study by Ken Haggard a while back addressed this or similar properties. I found reference in a GSBN email from '07- see below. Is this the same metric?


Laura




John,

There is that chapter from Ken Haggard and Polly Cooper on Natural
Conditioning in the book Alternative Construction where they look at
this. I was looking at it just recently for some curriculum development.

Laura

John Swearingen wrote:


Very interesting paper, and well written.  Some time ago I remember hearing

someone toss out some similar observations about thermal storage, that on a

diurnal cycle, plaster is activated to a depth of about 2-3 inches

(5cm -7.5cm).  I have always figured that the exceptional thermal

performance of

straw bale buildings is not due solely to the high R-value.  The broad

thermal mass of the plastered walls, readily available to indoor air for

heat exchange, modulates temperatures like my pink Cadillac modulates bumps

in the road.



Does anyone know of research and measurements of short and medium thermal

storage in walls?



John "Diurnally Yours" Swearingen







Laura Bartels
GreenWeaver Inc.
520 S. Third St., Suite 5 
Carbondale, CO 81623
970-379-6779
www.greenweaverinc.com












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