Understanding the Floor Sanding Process in London
If you have never had your floors sanded before, it helps to know what the process actually looks like from start to finish. Hardwood floor sanding in London general follows a fairly standard sequence, though the specifics depend on the condition of your boards, the species of wood, and the finish you choose.
Before Work Begins
A good contractor will inspect the floor before anything starts. They will look for raised nails, which need punching down to avoid damaging the sanding drum. They will check for loose boards, cupped sections, or areas where the timber is too thin to sand safely. In older properties across London, particularly those built before the Second World War, boards can sometimes be worn down to near the tongue-and-groove joint. Sanding those too aggressively risks exposing the tongue and making the floor unstable.
You will need to clear the room completely. Most contractors will move light furniture as part of the job, but heavy items like pianos or large wardrobes are usually your responsibility. Remove any rugs, and if possible, tape plastic sheeting over doorways to limit dust movement through the rest of the house.
The Sanding Sequence
Professional floor sanding in London general typically involves three or more passes with progressively finer sandpaper grits. The first pass uses a coarse grit to remove old finish, stains, and the top layer of wood. This is the noisiest and dustiest stage. The second and third passes refine the surface and remove the scratches left by the previous grit.
A large belt sander is used for the main floor area. An edge sander handles the perimeter of the room, and a detail sander or scraper is used in corners and tight spaces that the machines cannot reach.
- Coarse grit (24 to 40): removes old finish and levels uneven boards
- Medium grit (60 to 80): smooths out scratches from the first pass
- Fine grit (100 to 120): prepares the surface for finishing
Dust-Free Sanding in London
Most professional floor sanding companies operating in London general now use dust-extraction machines that capture the vast majority of dust at source. This is far less disruptive than older methods and much healthier for both the occupants and the contractors. The floor will still need a thorough vacuum and tack cloth wipe before any finish is applied.
Choosing Your Finish
Once the floor is sanded, the finish is applied. The most common options in London properties are:
- Water-based lacquer: quick drying, low odour, hard-wearing, available in matt through gloss sheens
- Oil-based lacquer: longer drying time, slightly amber tone, very durable
- Hard wax oil: penetrating finish, easy to repair in sections, popular for family homes
- Danish oil: traditional look, requires more maintenance over time
If you want a specific colour, a stain can be applied before the topcoat. In London general particularly, grey and white-washed tones have become popular over the last few years, though natural and lightly oiled finishes remain the most common choice.
Timeline for a Typical Job
A single bedroom or living room in London can usually be sanded and finished in one day, though you will need to stay off it for at least 24 hours afterwards. Larger spaces or whole-house projects take two to five days. Allow extra time if the floor needs significant repairs, gap filling, or if you are having a stain applied between coats.
Plan ahead. You will need somewhere else to sleep if the bedrooms are being done, and you will not be able to use the kitchen if the hallway is drying. Most contractors working in London general can advise on the best sequence for whole-house projects to minimise disruption.
What the Finished Result Should Look Like
A properly sanded and finished hardwood floor in London general should be smooth, uniform in sheen, and free of visible scratches or lap marks. The grain of the wood should be clear and even across the room. Any gaps between boards may still be visible, particularly in older properties where boards have dried and shrunk over decades, but a good contractor can fill these before finishing if you prefer a tighter look.
The floor should feel solid underfoot, with no significant spring or movement. If any boards were loose before sanding, they should have been secured before work started.
After the Job
Once the floor is cured, treat it well and it will last many years. Use felt pads under furniture legs, avoid dragging heavy items across the surface, and clean with a slightly damp mop rather than soaking the floor. In London homes with underfloor heating, keep the system at a consistent temperature to minimise movement in the boards. Most finishes in London general properties hold up well with basic care for ten to twenty years before any re-treatment is needed.
