Sand & refinish a floor.

Beyond aesthetics, refinishing provides a vital protective barrier against moisture and foot traffic. In the UK’s damp climate, a high-quality seal prevents boards from warping and makes the floor significantly easier to clean than carpet, particularly for households with pets or allergy sufferers.

What Does the Work Involve?

• Preparation: The room is cleared, and any protruding nails are "punched" below the surface to prevent damage to the sanding belts.
• Repairs: Loose boards are secured, and damaged sections are replaced with reclaimed timber to match the original age and grain.
• Coarse Sanding: Using a heavy-duty belt sander, the professional removes the old finish and levels the boards.
• Fine Sanding: Successive passes with finer grit papers (usually 40, 60, 80, and 120 grit) create a perfectly smooth surface.
• Edging: A specialised rotary sander is used to reach the very edges of the room and into corners where the main machine cannot reach.
• Gap Filling: A resin mixed with fine sanding dust is often applied to fill gaps between boards for a more uniform look and to reduce draughts.
• Buffing & Finishing: The floor is buffed to a high standard before applying multiple coats of lacquer, oil, or hard-wax oil.

Typical Costs

Prices for floor sanding in the UK are typically calculated per square metre, though most contractors will have a minimum day rate for small rooms or hallways. Costs vary based on the condition of the wood and the type of finish requested.

Factors affecting the final quote include the "hardness" of the wood (oak takes longer than pine), the presence of thick bitumen or paint, and the number of hearths or intricate corners that require manual detailing.

How Long Does It Take?

• Single Small Room (up to 15m²): 1 to 2 days, including drying time between coats.
• Average Through-Lounge: 2 to 3 days, depending on the amount of repair work required.
• Full Ground Floor: 4 to 6 days, as work must often be phased to allow for access.
• Curing Time: While floors are "touch dry" in hours, most finishes require 24–72 hours before furniture can be moved back, and up to 14 days before laying rugs.

DIY or Professional?

While hire shops offer floor sanders, DIY results often suffer from "chatter marks" or deep gouges caused by inexperienced handling of heavy machinery. Professional-grade equipment features sophisticated dust-extraction systems that keep your home significantly cleaner than standard rental units.

Professional floor finishers use "continuous belt" sanders which provide a much flatter finish than the "drum" sanders typically found in DIY hire centres.

Furthermore, professionals have the expertise to identify wood species and recommend the correct finish. Using the wrong lacquer on a resinous wood can lead to "tannin pull" or peeling, which is costly to rectify.

Choosing the Right Tradesperson

• Dust-Free Claims: Ask what percentage of dust their machines capture; modern "HEPA" filtration systems should capture 98% or more.
• Insurance: Ensure they hold Public Liability insurance to cover any accidental damage to skirting boards or fixtures.
• Portfolio: Look for photos of "before and after" work specifically involving the same wood type as your floor.
• Questions to Ask:
  • What brand of finish do you use (e.g., Bona, Junckers, Osmo)?
  • Does the quote include the cost of all abrasives and seals?
  • How many coats of finish are included in the price?
  • Will you remove the waste sawdust and old floor coverings?

UK Regulations

• VOC Compliance: Professional finishes sold in the UK must comply with Volatile Organic Compound (VOC) limits to ensure indoor air quality.
• Waste Disposal: Tradespeople are responsible for the legal disposal of sanding dust and chemical containers; check if a waste transfer note is included.
• Listed Buildings: If your property is Grade I or II listed, you may need Listed Building Consent before altering original historic floorboards.

Common Problems

• Sanding Marks: Visible "swirls" or lines caused by rushing the grit sequence or using worn-out sanding belts.
• Inconsistent Stain: Blotchy patches occurring because the wood was not sanded uniformly or "popped" with water before staining.
• Dust Contamination: Tiny particles trapped in the wet lacquer, creating a sandpaper-like texture on the finished floor.
• Peeling Finish: Usually caused by applying a new finish over an old wax or oil residue that wasn't fully removed.

Frequently Asked Questions