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SV: GSBN:Re Thermal Properties of Straw Bale Walls

Dear all
A summary of different measurements of heat conductivity and U-values (in SI-units, note also that U-values are the inverse of R-values) are given in English at pp 43 - 45 in our publication on SB-houses. It can be downloaded from 
<a  target="_blank" href="http://www.sbi.dk/byggeteknik/konstruktioner/serlige-konstruktioner/halmhuse/halmhuse";>http://www.sbi.dk/byggeteknik/konstruktioner/serlige-konstruktioner/halmhuse/halmhuse</a>
There is an optimal density for every material, but it will vary with the type of straw. The optimum is very flat for most materials, and it surely is flat for straw. There are much bigger problems than the influence of the density to be solved if we want reliable U-values. This is also dealt with in our publication.
Best wishes 
J&#xBF;rgen Munch-Andersen
SBi (Danish Building Research Institute)
Dr Neergaardsvej 15
DK-2970 H&#xBF;rsholm
Tel +45 4574 2388 (dir)
Fax +45 4586 7535


Fra: GSBN p? vegne af John Glassford
Sendt: fr 18-05-2007 04:03
Emne: Re: GSBN:Re Thermal Properties of Straw Bale Walls

G ' day Nehemiah and Andrew et al

Many thanks for the replies and for your considered input.  It is very
much appreciated.

I am sure that there is much more work to be done in this area
especially with jumbo bales as they are naturally compacted a lot more
than the smaller bales.  Does that provide more or less insulation?
Many questions ahead of  us.

Kind regards John Glassford.
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