Floor leveling

As I live in an old home, is faced with all sorts of miracles. One of these miracles is uneven floor and mysterious holes that are formed during the year. It is strange that these homes are so fragile floor. However, everything can be solved. And one of the variants of this problem can be solved is that all over the room had to be put plywood boards that are screwed to the old floor. Ordinary plywood sheets are not particularly expensive material. When the floor is put in order, and without holes, and a more or less flat, then you can start to think about what to do with the floor below. I would recommend parquet. Parquet prices are not the cheapest, but the effects wear is very good. View of the life changes dramatically.