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那么 renovation能做什么, 屋顶肯定室容易做, 但是墙壁呢? 9 }7 M, N _6 O e , n, ~! [/ ~1 Q3 ^( |# ~* ~1 H' ]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?. \$ h p2 y) Y7 I1 B% c5 C$ R
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.