단열재를 사용하는 방법도 있습니다. 건물에도, 벽에도, 천장에도 문틈도 좋죠. 그런데 슬픈 사실은
You can also get the fluff men in to reduce the leakiness of your building -- put fluff in the walls, fluff in the roof, and a new front door and so forth, and the sad truth is, this will save you money.