Floors in the Burbage core have a problem that comes directly from the buildings standing on the footpath.
Where a house fronts straight onto a pavement, the external ground level at the front is fixed by the highway, and over a couple of centuries of resurfacing that level has usually risen. On more than a few of these cottages the pavement now sits close to, level with, or above the internal floor. That puts moisture into the front wall and into the edge of the floor, and it is the single most common cause of a damp ground floor in a village core property.
It matters for flooring because covering that up with an impermeable finish moves the problem rather than solving it. We look at what is happening at the front wall before specifying a floor, and where the level is the cause we say so, even though the honest answer is sometimes a more involved job than the one you asked about.
Elsewhere the usual applies. Suspended timber floors need their sub-floor ventilation working, and blocked air bricks take the joist ends in the end. The estate housing has solid floors where flatness and moisture are the questions and most need levelling before a hard covering.
Timber acclimatises in the house before it is fixed. Our flooring page covers the preparation underneath the finish.