On 19/03/12 23:56, Christopher Fraser wrote:
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.)
A variation on the above idea without the use of polyiso or cement is an OSB
hexayurt, covered in insulation (shredded newspaper, rockwool etc) and then a
layer of lime and aggregate to seal it.
I came across a material called Secil ecoCORK Lime, which is a Natural Hydraulic
lime mixed with cork aggregate. It's made by Secil Argamassas over the border in
Portugal so not so far from where our project is. It's cheaper and more
insulating than straight lime, so might be an ideal choice.
Christopher.
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