ballard 发表于 2013-8-20 22:18 ) h6 F- X0 w% G4 N2 I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。 l' R! O. ~6 ^: s2 K/ p
+ I9 x3 d7 j3 Z5 e p/ {0 o v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. + x Q3 i% R- d# o% A% C+ o3 e % g7 K4 U# \) E& Y& z; @& Z
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.