ballard 发表于 2013-8-20 22:18 4 M1 q9 D7 _) W8 U
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。: D4 s# P- |* H. k B
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大家都晒晒 就知道了 ...
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2 B! ]9 E- h. g7 m/ {3 H" m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. / Y. N5 P8 v5 m$ [, b# S. e& u 5 ]- f& H: C, c5 T/ t0 \9 s9 b7 s
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.