boards
"Floorboards" are tongue and grooved wooden planks that are used to make wooden floors.
He tried to sneak quietly through the house, but the creaking floorboards gave him away.
The prepositional phrase in this sentence is 'Beneath the floorboards'.
so you can always see
There is a condition called cupping where the edges of the boards are higher than the center. It's usually caused by the boards absorbing moisture. If your floorboards are cupping, look for somewhere that moisture is getting under the floorboards. Possibly a leak.
eucalyptus
Remove it with a wet/dry vac.
We did and it worked great
The rotting floorboards made the floor creak.
heater core is shot...
Cheers - 1982 Where Have All the Floorboards Gone 10-8 was released on: USA: 7 November 1991 Netherlands: 20 March 1992