I was thinking of making a wonderbox ( its like a cloth hay box or a giant tea cosy) but the instructions all seem to contain either
Polystyrène - not keen on that
Hay - mould issues
Or newspaper -structural strength zero
So how about using acorns?
Would they be a good insulator?
Living in Anjou , France,
For the many not for the few
Note to self: don't get into a fist fight with a cactus. Command this tiny ad to do it:
A rocket mass heater is the most sustainable way to heat a conventional home