ballard 发表于 2013-8-20 22:18 h+ y$ D9 L* ^- o我家的房子,冬天上午, 太阳足的时候,自然达到17-18度。 房子07年的。 " J4 \0 m0 t- | 9 O, N3 d' D0 |+ H* z" e' b大家都晒晒 就知道了 ...
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我家的房子,冬天上午, 太阳足的时候,自然达到25度。 房子02年的。I did upgrade the ceiliing insulation from R20 to R60 though. . W$ j: r$ W8 s5 _) g; B ' p; ~; m( p ?: ^! z" N. p
40% is lost from ceilling. 40% from windows. so 屋顶改进分别对保温性能贡献大. Costed me $2000, because I used the Pink insulation ( usually for walls) at the ceiling. If you use foam that usually for ceilling, then your cost should be only 1/3 of mine. Rent a foam spreader from HomeDepot.