When an architect specifies "sustainable insulation," words like modern and progressive come to mind to describe this strategy for creating energy efficient, durable, and comfortable buildings that are healthy for occupants and for the planet. Surely, this green scheme perches on the cutting-edge of building science. However, archeological research reveals that insulating our homes (be they caves, castles, or cabins), using natural, renewable materials like fiber, wool, straw, and cork, is actually as old as human history.
展开▼