[Strawbale] Fwd: Futility of quantifying properties of natural materials (was Re: compressing or not

Max Vittrup Jensen Max at PermaLot.org
Wed Mar 19 19:53:16 CET 2014

Hi again,

Ok, so not 'unplastered', but 'slightly plastered' (Sounds like me after a
night at the pub!)

I'm aware about approx. 5 national fire tests, but due to the cost and the
aim they are all done with between 3-5 cm earthen plaster.
The only firetest I'm aware off which actually confirms that a clayslip is
sufficient is the one carried out at the final evening of the excellent
ESBG07 in Germany. -I just noticed that my hopelessly amateurish filming of
it has received 12.986 on youtube!
I don't know if links work in this forum, if not then search for 'Strawbale
fire test'

...But I'm afraid it's not going to convince the authorities...

Cheers, Max

On Wed, Mar 19, 2014 at 7:34 PM, Dave Howorth <dave at howorth.org.uk> wrote:

> On Tue, 2014-03-18 at 18:17 -0700, Menno Houtstra wrote:
> [snip]
> > although i must say that in the cases that i described it is about a
> > compressed strawbale wall inside a concrete building.
> [snip]
> That statement rings alarm bells for me with regard to possible
> condensation problems and consequent rot. Whether there could be
> problems depends on a lot of factors, but if you're in a northern
> European climate and the bales are up against concrete external walls,
> there may well be a problem.
> You might also want to read up about the chimney effect if unplastered
> bales are stacked alongside some other structure.
> You may well have already considered these possibilities but I thought
> it safest to point them out.
> Cheers, Dave
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