ballard 发表于 2013-8-21 13:35 # j: d7 E7 j$ x0 ? ^9 A, a
那他家 的房子肯定好啊, - N" d4 P8 Y) R& K
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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?3 s x |1 z- g( C# j. |
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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?! y* r V, w) ~5 c) ^0 G/ o
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.