Floors in a Kenilworth villa are usually better than the owner expects, and that changes the sensible answer.
These houses were built with decent quality softwood boards over generous joists, and a large proportion of them are still there under whatever has been laid on top since. Before specifying a new covering we look at what is underneath, because lifting, cleaning and relaying original boards frequently produces a better floor than anything that could be bought to replace it, and costs less than a good engineered board.
Sub-floor ventilation is the thing to check first on any suspended floor. The air bricks are doing a job and on these plots they are regularly blocked by a raised patio, a later extension or fifty years of border planting. Block the ventilation and the joist ends begin to go, and a beautiful floor over a rotting one is money wasted.
On the modern estate housing the floors are solid and the questions are flatness and moisture. Most need levelling before a hard covering, because a floor out by a few millimetres over a couple of metres shows badly in large format tile.
Timber acclimatises in the house before it is fixed. Our flooring page covers the preparation underneath the finish.