I was thinking of sanding the floor in the kitchen. However, when I removed all the layers on top, I discovered that there was about 3 square meters missing of the wooden floor in one part of the kitchen. There are particle boards nailed to planks. These are level with the linoleum floor that lies on top of the wooden floor (not asbestos according to tests).
1. Should I tear out the particle boards and install new joists and lay a new plank floor where it's missing? The base consists of various gravel and miscellaneous debris. Should the joists be attached to the brick wall or just rest on the gravel bed as was done by DIYers in the 60s? Difficulty level?
2. Should I just lay a new wooden floor for simplicity's sake? Is it unwise to leave the old linoleum floor in place? Is it even possible to screw into the linoleum floor?
The thing is also that there's a lot of creaking right at the seam between the particle boards and the wooden floor. Not that we care so much, but when making such a thorough change, it should still be good.