I'd love to use sheeps wool in a hut but I am feart of damp, vermin and rot being introduced by an organic material built into walls, roof & floor. Reading the manufacturer's blurb is all very well but they, naturally, give a best case scenario of performance.
Against these fears about wool is my unhappiness at using insulation products that are petroleum based or have high-embodied energy and may be sources of toxins. It feels like a real bind. It seems quite hard to get unbiased real-world views about insulation on the web.
Would a wall that allows moisture to escape outwards ("breathing wall") give long-lasting i.e. decades of useful life from wool? I'm thinking of a hut wall with (from the inside):-
- 4mm wood/veneered plywood paneling with Danish Oil finish
- Non-permeable vapour barrier behind panelling
- 75-100mm sheeps wool between timber studs
- OSB 3 sheathing, 9mm
- Permeable breather membrane
- 25mm vertical battens to all air circulation/ventilation
- 40mm horizontal battens to fix cladding to
- 20mm vertical "batten on board" timber cladding, open at top & bottom to allow air circulation.
Can anyone foresee any problems with using sheeps wool in such a wall?