Replastering is one of those jobs that unlocks everything else — you cannot paint, tile, or wallpaper properly onto a crumbling or patchy wall. The cost varies considerably depending on whether you need a simple skim coat to freshen the surface or a complete strip-and-replaster back to brick.
For a typical UK bedroom (roughly 12–14 m² of wall area after windows and doors), expect to pay £400–£700 for a full replaster or £150–£350 for a skim coat. Ceilings add cost because the work is slower and more demanding. The sections below break down the process, pricing and what you should realistically allow for drying before decorating.
Skim Coat vs Full Replaster
Understanding the difference between these two is the most important decision in any plastering job.
Skim coat (also called finish plaster or setting coat) applies a thin layer — typically 2–3 mm — of finishing plaster over an existing sound substrate. This is the right approach when the underlying browning coat or plasterboard is structurally intact but the surface is tired, cracked at hairline level, or textured in a way you want to smooth. It is faster and cheaper than starting from scratch.
Full replaster (or base coat + finish) involves hacking off the existing plaster back to the masonry or lath, applying a 10–15 mm sand-and-cement or gypsum browning coat, letting it partially set, then applying the 2–3 mm finish skim on top. This is necessary when plaster is hollow (tap it — a dull thud rather than a ring indicates debonding), when there is active damp behind the plaster, or when the existing substrate is lath and horsehair from a Victorian property that has reached the end of its life.
Plasterboard and skim is a third route common in modern renovations: dot-and-dab or batten-fix 12.5 mm plasterboard sheets to the wall, tape the joints, then skim the entire surface. This is faster than base-coat plastering, more thermally stable, and often the method of choice where walls are uneven or damp-proofing has been applied behind a membrane.
Plastering Cost per m²
The table below shows typical 2026 UK rates from a sole-trader or small firm plasterer. London and South East rates run 20–30% above these figures; Yorkshire, the Midlands and Wales tend to sit at the lower end.
| Work type | Low (£/m²) | Typical (£/m²) | High (£/m²) |
|---|---|---|---|
| Skim coat (walls) | £7 | £10 | £15 |
| Skim coat (ceiling) | £9 | £13 | £18 |
| Full replaster — walls (base + skim) | £14 | £19 | £27 |
| Full replaster — ceiling | £18 | £24 | £32 |
| Plasterboard, tape and skim (per m²) | £22 | £30 | £40 |
| Patching (per patch, up to 0.5 m²) | £60 | £90 | £150 |
These rates are supply-and-fix, including materials. Labour alone is roughly 60–70% of the total; the plasterer’s materials (bonding agent, base coat, finish plaster, beads) make up the rest.
Room-by-room cost guide
The figures below assume a standard ceiling height of 2.4 m and UK average wall areas after deducting windows and doors.
| Room | Approximate wall + ceiling area | Skim cost (estimate) | Full replaster (estimate) |
|---|---|---|---|
| Single bedroom | 30–35 m² | £280–£450 | £500–£750 |
| Double bedroom | 40–48 m² | £380–£600 | £700–£950 |
| Living room | 50–65 m² | £480–£800 | £900–£1,500 |
| Kitchen (walls only to dado) | 15–20 m² | £150–£280 | £260–£450 |
| Bathroom | 20–28 m² | £200–£380 | £350–£600 |
Stairwells and hallways with high ceilings or restricted access attract a premium — add 15–25% for difficult access or work above 3 m.
The Replastering Process
Knowing what a competent plasterer should do helps you manage the job and spot shortcuts.
Preparation
Sound preparation adds a day but saves problems later. The plasterer should:
- Hack off loose, hollow, or failing plaster and remove to a firm edge (not just patch over)
- Remove all nails, old fixings, and wire
- Apply a PVA bonding agent or Thistle BondIt primer diluted 1:1 with water and allow to become tacky before applying the base coat — skipping this step on porous or painted surfaces is a common cause of plaster delamination
- Set galvanised corner beads and angle beads at all external corners and around reveals; these should be plumb and level, not eyeballed
Base coat (browning or bonding coat)
Applied at 10–12 mm thickness in one or two passes, scratched with a devilling float to create a key, then left for the surface to firm up. On dense concrete or engineering brick, a bonding coat (Thistle Bonding Coat or equivalent) is used rather than a sand-and-cement browning because it adheres to low-suction surfaces.
Finish coat (skim)
Thistle MultiFinish or Finishing Plaster is the industry standard. It goes on at 2–3 mm in two thin passes — the first to fill the scratch marks, the second trowelled to a smooth finish with gradual pressure. Polishing with a damp brush as the plaster firms up produces the mirror-flat finish that takes emulsion cleanly.
Quality checks
A competent skim should be:
- Flat to a 1.8 m straight edge — no dips or ridges greater than 3 mm
- Free of trowel marks, pitting, or cat scratches
- Consistent thickness at the edges and around beads
Drying Times Before Decorating
This is where homeowners frequently come unstuck. Fresh plaster is pink-orange when wet and pale cream when fully dry. Painting over wet plaster traps moisture and causes paint to peel.
| Plaster type | Minimum drying time | Conditions |
|---|---|---|
| Skim coat (2–3 mm) | 3–5 days | 18–20°C, low humidity, ventilated |
| Base coat + skim (12–15 mm total) | 5–10 days | As above |
| Plasterboard, taped and skimmed | 4–7 days | As above |
| Large volumes (living room full replaster) | Up to 4 weeks | Fully cured for solvent-based products |
Accelerating drying with a fan heater set directly on fresh plaster causes surface cracking — the outside dries too fast while the inside is still wet. The correct approach is good background heat (16–20°C) and ventilation, with a fan heater set to the far side of the room. A dehumidifier can safely speed drying by 20–30%.
A mist coat — emulsion diluted 70:30 with water — applied once the plaster is pale cream and dry to the touch creates a porous first layer that binds without sealing. Apply two full coats of finish emulsion after that.
What to Watch Out For
Damp behind the plaster: if the existing plaster failed because of rising damp or penetrating damp, replastering over the same surface will fail again within 2–3 years. Address the source first — DPC injection, tanking, or cavity drainage — before replastering.
Cold external walls: plaster on uninsulated solid-wall external elevations can suffer thermal bridging condensation. Consider insulated plasterboard (dot-and-dab with 25–50 mm PIR backing) on cold external walls to push the dew point outward.
Asbestos-containing textured coatings: Artex and other textured finishes applied before 2000 may contain chrysotile asbestos. Do not sand or scrape without testing — an asbestos survey costs £150–£300 and is money well spent. Plastering over intact artex (rather than removing it) is a safe alternative.
Suction variation: old brick walls with patches of cement render absorb water at different rates, causing patchy drying. Ask the plasterer how they intend to control suction — bonding agents and PVA are the standard solution.
Getting Quotes
Get at least three quotes and ask each plasterer to specify whether they are quoting skim or full replaster, how they intend to prepare the substrate, and what materials they plan to use. A vague quote covering only “plastering a bedroom” without these specifics makes it impossible to compare prices or hold the contractor to quality standards.
Reputable plasterers in 2026 are typically booked 4–8 weeks in advance in most of England; expect shorter waits in Scotland and Northern Ireland. If someone is available next week for a keen price, ask why.
Day rates for plasterers run £200–£300 per person per day in the Midlands and North, and £280–£400 in London and the South East. A competent plasterer can skim an average bedroom in half a day and base-coat-and-skim the same room in a full day to a day and a half.
