ballard 发表于 2013-8-20 22:18 3 Z4 B# E$ J9 ]3 w9 t. 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。 7 `: J" B) g( L6 ]6 z+ L N6 h2 v- `2 W$ u& w$ I
大家都晒晒 就知道了 ...
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0 {2 m1 {. P. R1 U# I6 {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.' q& D8 H2 ^* p T
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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.