ballard 发表于 2013-8-20 22:18 8 x. C9 M M9 N& d0 V' [& y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。 . _8 M7 w H. L. z# Q8 o: h( s, N2 W7 Q& |5 D
大家都晒晒 就知道了 ...
" J$ E" {2 ^: U( G. r) l
K& f/ A. k& Z8 X
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. ) |7 |) D- i. K9 q6 h# D $ Q+ D7 H7 {6 u: Q% b. E; T
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.