Concrete has a very low insulative quality, unfortunately. Rice hulls have very good insulative qualities, but are extremely heavy, too heavy for insulating a ceiling. Plus you have to deal with pests eating the rice residue left in the hulls. But you'd have that problem with any natural insulation. Straw bale is a very good insulator, when covered with plaster or cob. Styrofoam makes great insulation, as well as chicken feathers. Feathers have been used in quilts for centuries, so why not as insulation? Paper (cellulose) can be used but has to be sealed extremely well. I've even read of plasters and insulation being made of cow dung, imagine that.
I have some websites on what materials have good insulative qualities on my computer at home. I've been researching cob dwellings extensively. Most cob sites do have some info on earthbag and earthship housing.
I'll post this evening.
Lo~
I have some websites on what materials have good insulative qualities on my computer at home. I've been researching cob dwellings extensively. Most cob sites do have some info on earthbag and earthship housing.
I'll post this evening.
Lo~
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