floor dip

I have been working to renovate my first home and had to replace an area of joists and floorboards on the ground floor with OSB3 18mm sheets Since having the kitchen installed I have noticed the floor moves a bit under foot even when screwed down which is worst under the joints between the...

I have just finished installing a new floating, click together, engineered wooden floor in my first floor bedroom. I had been pretty diligent to prepare the room before hand, remove any raised nails, splats of plaster etc, and check for any dips in the subfloor. I didn't notice any. The...