Hello,
We have renovated the house quite a bit since we moved here, and two of the floors (kitchen (17 m2) and hall (14 m2)) have gotten Kährs oak parquet 3-strip. After just a short period, we've noticed that the floor sags significantly in certain places and creaks. You can't notice the sagging when walking, but it's clearly visible.
The margins are well measured and according to all the rules of art, which in this case meant we had to choose slightly wider baseboards.
The first thought is, of course, to screw the floor down, but since it's a floating floor that expands/shrinks with the seasons, that's a really bad idea.
Under the parquet, you find large chipboards that, after 50 years, are certainly not completely straight either. When we replaced one of the floors, there were paper sheets here and there, perhaps intended to fill in unevenness.
It's hard to pull up the floors, of course, but there seems to be no other choice if we want to fix the problem. The question is, though, how do you get this right? Should one crawl around with a straightedge and fill in the dips somehow or how is it usually done?
