[Strawbale] Strawbale roof insulation
Mark and/or Jan Bigland-Pritchard
hyphen at dial....com
Wed Sep 18 00:59:45 CEST 2002
Excuse me while I ramble off in a few directions simultaneously - a sign
of woolly thinking?...:
(1) I can't help thinking, despite what has been written here, that wool
insulation won't fully take off until it can be insect-proofed safely
without being smelly, and this at a reasonable cost.
I'm still not sure why this seems so impossible at the moment.
(2) Have fire tests been done on unwashed wool? - my understanding was
that extracting the lanolin is as much to reduce flammability as to
(3) Can you give us more details, Andre, of what this good French book
says? What is the chemical treatment it refers to, and what health
hazard does it pose? (Most of the installations I've heard of use
I'm not aware of any significant health hazards associated with it but
would certainly like to know - plus preferably see the evidence - if
(4) I'm sure there's plenty of research still to be done on sheeps wool.
To take one example, how significant is carding in the process of
insulation production? (CAT seem to think it was important in their
building.) The argument is that with less lumps you get less
coldbridging and so a better insulant - but by what margin, and how
would the lifetime savings compare with the energy costs of the carding
Andre de Bouter wrote:
> > Industrially processed sheepswool is clean, easy to handle and does
> > not smell a lot.
> It also costs a lot more since they wash and treat the wool, plus
> they (and the reseller) need to make a buck. I'm told (by a good
> French book on Ecological Insulation) that the chemical treatment
> used by almost all companies is not a healthy one for neither builder
> nor owner.
> But hey, it looks and smells really clean ;-)
Harald Wedig wrote:
> > Hello Barbara,
> > people have made mistakes with sheepwool insulation, just as with chaff
> > ( is that the right word for grain shells ?) and other organic
> > materials. We all know, that organic materials are very sympathetic to
> > ALL liveforms; not only to humans.
> > We need to understand wool like we need to understand straw, before we
> > can use it without any risk.
> > Industrially processed sheepswool is clean, easy to handle and does not
> > smell a lot.
> > Cheers, Harald
Barbara Jones wrote:
> > > Hi Harald
> > > Glad to hear it is possible after all. I was sure it would be. Still
> > > don't understand then the need for such commercialisation of sheeps
> > > wool as a product, though am glad it's coming into mainstream.
> > > Perhaps because the "ordinary" buyer wants something that looks like
> > > rockwool?
> > > Best wishes
> > > Barbara
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