Abstract
Effectiveness of waste reduction and influence upon other environmental loads and costs were evaluated in two actual old house renovation cases. Conclusions are as follows: 1) waste reduction was observed by around 20% in the case of renovating at the same spot (case A), and a few % in the case of renovating at the different spots (case B); 2) not only waste but other environmental load reductions were observed by a few %-30% in the case A, and a few %-20% in the case B; 3) cost reduced in the case A and increased in the case B, and this implies the possibilities of cost reduction although it is said that old house renovation is expensive; and 4) the system that makes it possible to stock the recyclable materials and to reuse them at appropriate house renovations and constructions is necessary to rise the effectiveness of waste reduction.
