On 13/03/12 15:39, [email protected] wrote:
We*think* that polyiso + ferrocement is the way to go - extremely durable,
multi-decade buildings for very little money, fully insulated, long-term
waterproof, rotentproof, sun-proof, bug-proof etc. so rather than building
a temporary thing and recycling it, you build a permanent thing which is
*very* light on materials (the cement is only 1cm thick or so!) while we
evolve a good soy-based insulation foam (it's coming, lots of people are
working on it.)
Soy insulation foam looks very interesting.
Hmmm ... I'm not sure I would want to live in a polyiso + ferrocement building.
I have friend who lived in a concrete flat and hated it - problems with mould,
needing to have windows open in winter etc. I guess if you get the ventilation
right these aren't too much of a problem.
Somme other material issues are I'm not sure where to get polyiso in Spain (OSB
is hard enough!) and secondly I believe in parts of Spain and Portugal wooden
buildings are more easily classified as temporary (though I haven't looked into
the Extremadura building regs).
Anyway, thanks for all the replies everyone! A lot to think about. I'm still not
sure what to build. Because of the waterproofing and water harvesting issues I
think I'm leaning towards square-ish OSB insulated panel hut with an A-frame
roof, rather than a yurt, but need to look at costings and construction details.
Christopher.
PS: We've started announcing details of the summer camp we're organising. If
someone wanted to come and run something about hexayurts you'd be most welcome.
http://openeland.org/open-e-land-camp-2012/
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