ballard 发表于 2013-8-20 22:18 ) ^ G: R- f b- r/ E# r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。& K) b; x& \( {$ d: z! v8 m
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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. 5 j5 z1 b6 C" j1 _0 G: @4 P7 Z. M5 s7 I. f4 @; T, A, b: 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.