ballard 发表于 2013-8-20 22:18 5 Q# j5 i: ]" w& t+ m C
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。 : k7 p! _( M) r3 r: N, u# e* }3 D0 a& B, h
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. 9 O- i9 Q- u, r! w/ Y7 Z $ O- i$ B) v ^3 K
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.