ballard 发表于 2013-8-20 22:18 7 x5 u& ]# t9 c5 D; D0 W2 G& G
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。 - f+ @8 y+ d' T# x, U/ @8 N$ c * s' J! V7 ~: y6 o, y- {( n }大家都晒晒 就知道了 ...
) R, I; j9 G: P$ ?6 v& v ! Q% l5 X d; k8 J! }7 u0 y! q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. ( z+ G+ a9 x f. t- p 7 z4 {* _+ E+ M& z. X$ Z
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.