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那么 renovation能做什么, 屋顶肯定室容易做, 但是墙壁呢?1 F/ |8 C% n, p) S7 W3 \( {: H1 p/ D
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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?3 q( j/ W! ]1 S3 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.