[GSBN] UK SB Thermal performance numbers

[Bohdan Dorniak]

Thanks for the responses.
Getting a copy of the tests would make quite a difference to our current
energy ratings that are required for the Building Approval.
Are you aware if the tests that you did are similar to Australian Standards
testing??
Here in Australia I am endeavouring to get a cost and then find some funding
to do further tests how rendered bales will survive Bushfires (wildfires).
cheers
Bohdan Dorniak
Treasurer Ausbale
 

  _____  

From: GSBN-bounces at greenbuilder.com [mailto:GSBN-bounces at greenbuilder.com]
On Behalf Of Pete Walker
Sent: Saturday, 1 May 2010 6:55 PM
To: '(private, with public archives) Global Straw Building Network';
ArchiLogic at yahoo.ca
Subject: Re: [GSBN] UK SB Thermal performance numbers


Hi
 
The thermal test was undertaken in 2008 (reported 2009) in BBA labs in the
UK. The panel was 490 mm thick and 3.4 m high x 3.5 m wide with two layers
of approximately 30 mm thick hydraulic lime render on both faces. the bales
were laid flat (as standard) and the bale density was approximately 130
kg/m3 after compression inside a timber frame. the test was a steady state
guarded hot box arrangement undertaken in accordance with BS EN ISO
8990:1998. I will need to check with partners who sponsored the work before
releasing the report in full, although I don't expect it will be a problem.
 
regards
 
Pete

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From: GSBN-bounces at greenbuilder.com [mailto:GSBN-bounces at greenbuilder.com]
On Behalf Of Kelly Lerner
Sent: 30 April 2010 23:16
To: ArchiLogic at yahoo.ca; (private, with public archives) Global Straw
Building Network
Subject: Re: [GSBN] UK SB Thermal performance numbers


Hey Rob, 
I took off 1" stucco on each side (at R 0.2/inch) on both sides and came up
with R 1.75/inch for the bales themselves. Still better than the R 1.25/inch
that is listed in the 2007 PHPP. 

Kelly

On Apr 30, 2010, at 10:46 AM, RT wrote:


On Fri, 30 Apr 2010 09:19:14 +0100
"Pete Walker" <abspw at bath.ac.uk> wrote:



We have completed a certified thermal conductivity test on a rendered 3.5 x
3.5 m x 0.49 m thick straw bale panel. The U-value (thermal transmittance


rather than resistance) was 0.19 W/m2k. An R value of 5.3 m2k/W.




For the benefit of our non-SIU Murrican listmembers, the above translates to
a thermal resistivity of R-1.9
per inch (in imperial units of ft^2*hr*degF/Btu*inch), which is a bit more
flattering for SB than the value that the Californians have promoted as a
result of their "certified" testing.

So Peter, I'm wondering if you could share with us, a bit about the testing
set-up and procedure that was used in the UK testing program (or provide a
link to a site that describes it) ?

-- 
=== * ===
Rob Tom
Kanata, Ontario, Canada
< A r c h i L o g i c  at  Y a h o o  dot  c a >
(manually winnow the chaff from my edress if you hit "reply"
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Kelly Lerner, Architect
One World Design Architecture
509-838-8812
www.one-world-design.com

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