ballard 发表于 2013-8-20 22:18 4 K0 s; Q( _3 I' @' ?1 e+ F
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。* t6 L) z% u5 I8 h. ~8 k
; H6 }8 d" q+ M0 [% }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.: h& M8 I9 j0 T% J$ T+ e( h/ r
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.