ballard 发表于 2013-8-20 22:18 6 v" \ J& o s2 ~- i5 e
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。 ( z3 b2 U" k! f 6 N, z6 H2 x7 Q4 O- f3 \1 B大家都晒晒 就知道了 ...
$ L9 y( U. S" ~! P' T $ D2 [4 [* V8 S& R m+ `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. 3 t2 I- J1 y+ M! w% P) P+ u* F8 }3 q8 H; w( w K7 e
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.