Plastering quotes go wrong more often than they should. Not because plasterers can't price their work — they absolutely can — but because the quoting process itself is broken. You walk around a house, talk to the customer, have a rough number in your head, and then go home to type it up. By the time you're sitting at the kitchen table, you've forgotten the small lobby ceiling, the awkward chimney breast with the recessed alcoves, and the fact the customer mentioned they want dot-and-dab on the cold external wall in the back bedroom.
Taken individually, none of those things is huge. Together, they add up to £200–350 worth of work you've done for free. Do that across three jobs a month and you've given away the best part of a thousand pounds before Christmas.
AccuQuote was built with 200+ UK tradesmen — including a lot of plasterers — who were all losing money the same way. This guide covers what you're missing in your quotes, how to calculate plastering work accurately, and how to send a professional quote before you've started the van.
The Real Cost of Underquoting as a Plasterer
The underquoting problem in plastering is structural. Unlike a plumber where the rough scope of a job (e.g. "new bathroom suite") is fairly predictable, plastering jobs have enormous variation in what's actually involved — and much of it only becomes clear when you're standing in the room with a torch.
Here's what typically gets missed when quoting plastering work:
- Dot and dab on cold or damp external walls. A customer says "skim the back bedroom" and you quote for one coat of finish on existing plasterboard. But the wall is a solid external wall that needs insulated dot-and-dab boards before you can skim it. That's a completely different job.
- Beading on all exposed corners and reveals. Stop beads, angle beads, archway beads — these add up on a busy house. A full room with a bay window might want 14–18 metres of bead at £1.80/m from Toolstation, plus fixing time.
- Board replacement areas under the skim. You quoted to skim a ceiling. You get there and find a 1.2m x 2.4m section of old lath and plaster that needs to be cut out and boarded before you can skim. That's an hour and a half of work you didn't price.
- Plaster consumption on rough or porous backgrounds. A 12kg bag of Thistle MultiFinish covers around 10m² at 2mm. On a rough background — old sand-and-cement render, for example — you'll use more. Experienced plasterers know this, but it doesn't always make it into the quote.
- Slow rooms. A room with a chimney breast, alcoves, bay window and coved ceiling takes significantly longer to skim than a plain rectangular room of identical floor area. Flat-rate m² pricing kills you on these jobs.
Rule of thumb: If your quotes are consistently coming in under your expectations at the end of the job, the problem is almost certainly in the survey — not the work itself. Every missed item is a choice to work for free.
What Plastering-Specific Quoting Software Should Do
Generic quoting tools for tradespeople are too blunt for plastering. You need a tool that understands the specific materials and calculations that plastering involves:
- m² calculation from room scans. Know the exact area of every wall and ceiling you're quoting for, not a rough mental estimate made while chatting to the customer.
- Bag count calculation. Based on area, background type and coat count, calculate how many bags of MultiFinish, Hardwall, Bonding or Renovating Plaster you need. Don't forget the margin for waste — typically 10–15%.
- Plasterboard quantities. If you're dry-lining or dot-and-dabbing, calculate the number of sheets (standard 1200 x 2400mm Gyproc Wallboard or 1200 x 2400mm Knauf insulated board), plus the adhesive dabs and plugs.
- Beading by length. Input the number of corners, window reveals and door reveals and calculate metres of angle bead, stop bead and arch bead required.
- Labour by complexity, not just m². A bedroom with a chimney breast should generate a different day-rate calculation than a plain rectangular room of the same size.
- Primer and PVA. These are always forgotten. Thistle Bond-It or Unibond PVA for suction control — a 5L tub covers around 50m² and costs about £18 from Toolstation.
How AccuQuote Works for Plasterers
AccuQuote runs on iPhone and uses the LiDAR sensor (available on Pro models from iPhone 12 Pro onwards) to capture room dimensions accurately on site. Here's the workflow for a typical plastering survey:
- Scan each room on site. The 20-second LiDAR scan captures floor area, ceiling height, and identifies windows and doors. From this, AccuQuote calculates wall and ceiling areas automatically — you don't need to measure anything.
- Describe the scope. Tap the mic: "Skim all walls and ceiling in master bedroom, dot and dab required on rear external wall, angle bead all corners, PVA required on existing plaster." The AI parses this into a structured job scope.
- Review the bill of materials. The app generates quantities: bags of MultiFinish, length of angle bead, number of 12.5mm Gyproc Wallboard sheets for the dot-and-dab section, tub of Gyproc Bonding Coat, PVA. All priced from Toolstation or Travis Perkins at current rates.
- Set your day rate and adjust labour. Enter your day rate (typically £200–300/day for a plasterer) and the app estimates days. You adjust for difficulty — the chimney breast room gets an extra half day.
- Send the quote. A clean PDF goes to the customer immediately. It itemises materials separately from labour so the customer can see what they're paying for.
A Real Plastering Quote Example
Here's a realistic breakdown for skimming a large master bedroom with a chimney breast and two alcoves, including dot-and-dab on the rear external wall (a 1980s cavity wall with no insulation). Customer is in South Yorkshire.
| Item | Spec / Supplier | Qty | Unit | Total |
|---|---|---|---|---|
| Thistle MultiFinish 25kg | Travis Perkins | 8 | £14.50 | £116 |
| Gyproc Wallboard 12.5mm (1200x2400) | Travis Perkins | 6 | £12.80 | £77 |
| Gyproc Bonding Coat 25kg | Travis Perkins | 2 | £16.20 | £32 |
| Angle bead (2.4m lengths) | Toolstation | 10 | £1.85 | £19 |
| Stop bead (3m lengths) | Toolstation | 4 | £2.20 | £9 |
| Unibond PVA 5L | Toolstation | 1 | £17.50 | £18 |
| Thistle Bonding coat plugs & adhesive | — | — | — | £12 |
| Misc (scrim tape, nails, plastic sheeting) | — | — | — | £15 |
| Materials subtotal | £298 | |||
| Labour — 2 days @ £250/day | £500 | |||
| Total (ex. VAT) | £798 | |||
An underquote on this job — for example, quoting £600 flat without itemising — might still win the job, but you'd be working for about £150/day once you factor in materials. At £798 with clear justification, a customer who asked for three quotes and got two vague numbers will typically pick you.
FAQs About Quoting Plastering Work
How do I price plastering by the m²?
A rough guide for skimming (labour only) in 2025 is £6–10 per m² for experienced plasterers in most UK regions, rising to £12–14/m² in London. However, this rate only makes sense on large, plain areas — it breaks down on rooms with lots of features. Always price complex rooms at day rate, not m².
How many bags of MultiFinish do I need per m²?
A 25kg bag of Thistle MultiFinish at 2mm thick covers approximately 10m². On smooth backgrounds with PVA, you'll hit this. On rough or porous backgrounds, allow 7–8m² per bag. Always buy one extra bag per room for peace of mind.
Should I charge separately for materials on plastering jobs?
Yes — almost always. Materials should be a separate line item so you're not guessing wrong and absorbing the difference. It also makes your quote easier to compare against competitors, and customers are generally comfortable paying for materials they can see itemised.
What's the best way to quote a full house re-plaster?
Room by room, assessed individually. Don't try to quote a whole house with a single m² calculation — the variation between a standard bedroom and a kitchen with a chimney breast and four window reveals is too great. AccuQuote scans each room separately so you get an accurate figure per room, then combines them into a single quote document.
Ready to Quote Smarter?
AccuQuote was built by 200+ UK tradesmen — plasterers included. Three free quotes, no card required, no salesperson, no Calendly. Quote your next job on site and send it before you've even started the van.