The Complete Guide to Painting and Decorating a Staircase

Why Staircases Are Among the Most Demanding Decorating Jobs

A staircase is one of the few surfaces in a home that takes direct mechanical wear every single day. Every tread is a landing zone; every newel post a handhold. The combination of high traffic, complex geometry — strings, risers, treads, balusters, handrail — and the practical impossibility of shutting the staircase down for a week while work progresses makes this one of the most technically demanding decorating jobs in any London property.

Done properly, a well-finished staircase is a statement. Done poorly, it shows its defects at eye level every time you climb the stairs.

Painting vs Staining Treads and Risers

The first decision is whether to paint or stain the treads. This is not just aesthetic — it has major practical implications.

Painted treads (typically in a floor paint or hard-wearing eggshell) are easier to touch up, allow you to change the colour, and can conceal damaged or mismatched timber. Zinsser BIN shellac-based primer is the right choice under paint on bare wood, as it blocks tannin bleed and stains from old timber. For the topcoat, Dulux Trade Diamond Eggshell or Ronseal Diamond Hard Floor Paint provide the abrasion resistance treads need. Expect to apply at least two topcoats, with light sanding between coats using 240-grit.

Stained or oiled treads suit properties where the timber is genuinely attractive — good-quality pine, oak, or original hardwood. Osmo Polyx-Oil or Rubio Monocoat are the professional choices: they penetrate the wood rather than sitting as a film, which means wear appears gradually and sections can be re-oiled without obvious joins. If you want a harder film finish, Bona Traffic HD water-based lacquer gives excellent durability with lower odour.

Risers are nearly always painted regardless of what the treads receive, since they face outward and show every scuff. Match them to the skirting or woodwork colour for a unified look.

Banister and Newel Post Finishing

Banisters — the handrail, balusters, and newel posts — present their own challenges. The geometry means a lot of cutting in and careful work around spindles. On original Victorian or Edwardian staircases, expect multiple layers of old paint, often with soft, poorly adhered material hiding underneath. Always scrape and test before applying new paint; if anything is loose or chalky, key the entire surface with 120-grit and prime with an adhesion primer such as Zinsser Bulls Eye 1-2-3.

Handrails benefit from an oil-based or high-durability water-based finish because they take palm contact constantly. Tikkurila Helmi 30 or 50 are excellent here — hard, washable, and available in a wide sheen range. For turned newel posts with complex profiles, a synthetic brush with a tapered end (such as a 1.5-inch Hamilton Prestige) gives the control needed to work into recesses without bridging moulding detail with thick paint.

For painted spindles, a small cutting-in brush works better than a roller. Work from the top down. Keep a wet rag to hand to catch drips on already-finished treads below.

Cutting In at String and Wall

The string board (the angled board running up the side of the staircase) meets both the treads and the wall. Getting a clean line here requires steady hand-cutting with a good-quality brush rather than masking tape, because the tape rarely bonds cleanly to a sloped textured surface. Sharpen your eye rather than your tape. If the wall is freshly emulsioned, let it harden for at least 24 hours before attempting the cut-in.

Where skirting meets the string at the bottom of the staircase, fill any gap with a flexible decorator's caulk (UniBond or Gyproc jointing compound) before painting. Do not use silicone here — it will not take paint.

Dust Management on a Live Staircase

The practical reality of staircase work in a London townhouse is that the staircase cannot be cordoned off for days at a time. Dust from sanding handrails or stripping paint on risers will travel through the entire house.

Use a fine-extraction sander (a Mirka Deros or Festool ETS with a CT MIDI extractor) rather than open sanding wherever possible. This reduces airborne particles by around 90% compared with hand sanding. Seal off the ground floor with a door seal kit or taped polythene sheet at the foot of the stairs.

Work in sections. Complete one side of the staircase at a time, allowing pedestrian access on the other. Mark wet spindles or treads with blue tape flags. For treads, allow minimum four hours between coats even in a heated house, and keep household foot traffic off for 24 hours after the final coat.

Plan the Sequence

The correct working sequence matters: ceiling and walls first, then woodwork from top to bottom — handrail, newel posts, spindles, string boards, risers, treads last. Never do treads first and then sand the walls above them.

---

For staircase painting and decorating in London — whether a full strip and repaint or a professional refresh — contact us for a free quote.