ballard 发表于 2013-8-20 22:18 5 c3 K7 ], @: h$ H' Z% r h
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. R: ?3 Q6 V, v1 X) t
+ t+ W. I( e6 [& Y( }0 u, i# X大家都晒晒 就知道了 ...
! r' s' M5 N9 Q: d* G! r5 C H2 o0 m' P) K
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. 2 r" h+ h @$ u: k/ s. Z . s d3 a1 u+ B
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.