ballard 发表于 2013-8-20 22:18 e+ f1 E1 p5 H K) O Q, X5 d" {& w/ 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。 # {$ D4 N4 L* }' j* J" R! k" d6 w1 j+ `
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. 5 N) y! B& j% m5 s# p5 F, p! n2 s$ p : G7 T. Y g) b1 ]
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.