What you'll need:
- Talcum powder
- Damp cloth
- Drill
- Screwdriver
- 50 millimetre screws
Step 1: Talc it up
Locating the mischievous floorboard is easy; step on each board, one at a time until you find the culprit.
Sprinkle talcum powder (or flour if you don't have any talc) around the board and sweep it into the cracks. Add a little extra on the nails. The powder will ease the friction between the boards and nails, hopefully eradicating the squeaking.
Don't vacuum; wipe away the excess with a damp cloth.
Step 2: Screw it down
If the powder trick didn't work then get your drill at the ready.
Screw in a 50 millimetre screw alongside the present nails. You need to position the screw next to the nails to guarantee it goes into a joist and avoids any pipes and electrics running underneath.