First, make sure the terms of management. Most of the provisions if the performance level of the renovated floors in terms of management, spite fence is important to you. It is not about TSUKENAKU sound issue. Re to protect the flooring if it is possible. Sometimes the terms can not be managed flooring, if you switch to the tatami flooring and carpet, to avoid trouble on the first floor over the sound up and down the floor, it may also affect the sound even walk downstairs normallyWARANAKATTA . If the sound insulation to lower floors, and will report on progress.