# n' h; W+ n- ~' i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. 8 D8 {8 t V- g; k' _$ ?& s7 x ' a) Q" y8 y# r- c; k
ballard 发表于 2013-8-21 13:35 9 T9 ~( U9 V$ @' m X
那他家 的房子肯定好啊, 2 w* ^- m7 n( G- T7 ~ 8 A' X6 z. G/ I7 J# w冬季能升温 肯定热损失小吧, 夏季肯定就受日照影响小. 夏季屋顶在日照下烫手啊 ...
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那么 renovation能做什么, 屋顶肯定室容易做, 但是墙壁呢? , W2 k. |7 @ X9 \0 U, o E. X" a' O5 J# j+ K+ o1 t
屋顶和墙壁的改进分别对夏季和冬季保温性能 那个贡献大?9 v' B0 u* \! e6 V+ S4 w' ]
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.