Why Original Floorboards Are Worth Saving

In an old house, the floorboards are often the only surviving piece of the original interior. Joists, plaster and doors may have been replaced or covered over, but those wide, gently worn boards under the carpet are usually Georgian, Victorian or Edwardian work — cut from slow-grown pine, elm or oak that you simply cannot buy new today. That timber has a tight grain, a depth of colour and a patina that no modern board can imitate.

Restoring them rather than replacing them makes sound practical sense too. You keep the fabric of the building, avoid the waste of ripping out good timber, and sidestep the cost and upheaval of laying a new floor. Salvaged boards of similar age often cost more than new ones, and matching widths and thicknesses is fiddly. If your originals are sound in the main, they are almost always the better option.

Assessing What You Have

Before hiring any machinery, spend an afternoon on your hands and knees. Push a bradawl into any dark or spongy-looking patches to check for rot, particularly near chimneys, external walls and under radiators. Look for the fine frass and tiny flight holes of woodworm, and press on the boards to feel for movement or springiness that might suggest failed joists below.

• Cupping and crowning: edges lifting or centres rising usually mean moisture imbalance, not a ruined floor.
• Loose boards: often just failed nails; re-securing them is straightforward.
• Gaps: a certain amount of movement is normal and characterful; huge gaps often mean shrinkage over many decades.
• Historic finishes: test a small patch for wax, oil, shellac or paint, as each behaves differently under a sander.

Lift the corner of the floor covering in a couple of places to see what lies beneath. If the joists are rotten or the ventilation is poor, deal with that first — no finish will survive over a damp subfloor.

Repairing and Reclaiming Boards

Where a board is beyond saving, replace it with reclaimed timber of a similar species, width and thickness rather than a modern softwood board that will age differently. Let replacements acclimatise indoors for at least a week before fitting.

To lift a board cleanly, locate the joists and cut along the board over a joist with a circular saw set to just the board's thickness. Prise gently with a bolster chisel and protect the surrounding edges with a scrap of timber. Avoid splitting tongues on tongue-and-groove floors; work slowly along the joint.

Punch every protruding nail head below the surface with a nail punch before sanding — this single step saves more sanding belts than any other. Where boards creak, screw them down from above and plug the holes with matching timber pellets. For draughts, staple a breathable membrane over the joists from below, or fill the worst gaps between boards with slivers of matching timber glued and tapped in, followed by a flexible filler that can move with the floor. Keep ventilation to the void intact; old floors need to breathe.

Sanding Without Losing the Character

Hire a drum sander and an edge sander, and buy more abrasive than you think you need. Work diagonally across the grain with a coarse grade — around 60 to 80 grit — to flatten the surface, then straight along the boards with 100, then 120, and finish with 150. Going finer than that can polish the surface and prevent a finish from keying in.

Keep the machine moving at all times; pausing even briefly will gouge a dip you cannot sand out. Use the edge sander along skirting boards, and finish corners by hand with a scraper and sanding block. Remove every trace of dust with a vacuum and a tack cloth before sealing, and never wet the boards to raise the grain on an old floor — it invites movement. If you want to keep some of the patina, sand lightly and accept the darker areas; a fully bleached, uniform floor looks modern and loses the very thing you are trying to preserve.

Choosing a Finish That Suits a Period Home

Traditional floors were rarely varnished. They were scrubbed, waxed or treated with linseed oil, and that soft, low-sheen appearance suits old timber far better than a thick plastic coating.

• Hard wax oil: the best modern compromise — durable, easy to spot-repair, and available in matt or satin.
• Tung or linseed oil: deeply nourishing and traditional, but needs regular top-ups.
• Wax: beautiful on low-traffic floors, but requires buffing and reheating to repair scratches.
• Matt lacquer: tough and practical in kitchens and hallways, though harder to patch invisibly.

Apply two or three thin coats, wiping away excess, and allow proper drying time between them. A floor finished in this way will warm the whole room and quietly tell you the house is being looked after properly — which is exactly the point.