Now, spray foam is an excellent insulator -- it fills in all the cracks -- but it is pretty high embodied energy, and, sprayed-in cellulose or blue jeans is a much lower energy alternative to that.
発泡系断熱材は高性能で すき間を全て埋められますが 内包エネルギー量がかなり高いので セルロースやジーンズの繊維を吹きつける方が エネルギーを減らせます