! e2 x/ |3 a5 n那么 renovation能做什么, 屋顶肯定室容易做, 但是墙壁呢? / @/ T8 L: n' I* u ], }; T - v5 k. G4 o6 N! C- f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? , A- j. C. c" W3 S- }; ^9 O- j, M) j. H4 f1 s8 V* X
投入是多大?
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.