How long does it take to plaster a room?

It depends on the work and room size. A simple skim coat on walls in a small bedroom might take one day. A full room with new plasterboard and finish coat typically takes two to three days. Drying time is separate — you can't decorate until plaster is fully dry, which takes 5-10 days depending on ventilation and humidity. In Welsh winter, it can be longer. Your plasterer should tell you the drying schedule before starting. Don't rush the drying time; paint over damp plaster and it'll fail. If you're paying for the work, ask the plasterer to schedule drying time into their estimate so you know when you can decorate.

What's the difference between plaster and drywall (plasterboard)?

They're different but complementary. Plasterboard (also called drywall or dry lining) is a sheet of gypsum sandwiched between paper. It's fixed to walls or ceilings. Plaster is a wet compound applied by trowel to finish surfaces. Most modern work uses plasterboard fixed to the structure, then covered with a plaster skim coat (usually 2-3mm) for a smooth, paintable finish. Older properties used wet plaster applied directly to brick or lath (wooden strips). Some plasterers prefer one method; good ones use both depending on the situation. Ask your plasterer which method suits your job and why.

Can I paint over plaster immediately, or do I need to wait?

You must wait. Fresh plaster is porous and contains moisture. Painting too soon traps that moisture, causing paint to peel and blister. The rule of thumb is one month per 25mm of plaster thickness in normal conditions, though many plasterers suggest waiting at least two weeks before primer. In cold, damp Welsh conditions, wait longer. Your plasterer should advise based on their material and the weather when they work. You'll know plaster is dry when it's pale and uniform in colour — wet or fresh plaster looks darker. If in doubt, ask your plasterer to confirm it's dry before you paint. Using a primer designed for new plaster helps protect against moisture issues.

What causes cracks in newly plastered walls?

Minor hairline cracks are usually settlement — plaster shrinks as it dries, and the substrate (brick, block, or board) may move slightly. These are often cosmetic and can be filled during decoration. Larger cracks within days of plastering suggest the plasterer rushed the drying (applying too thick a coat, not allowing each coat to set), used the wrong material for the substrate, or the underlying surface moved. Cracks along plasterboard joints often mean the tape or jointing compound failed — a sign of poor technique. If cracks appear within the first month and are bigger than a hairline, contact the plasterer. Good ones will inspect and make good genuine defects. Cracks appearing after months or years are usually due to movement in the building itself, not the plaster.

Should I use a plasterer from a directory or a big national company?

Local independent plasterers often offer better value and more flexibility than large companies. They have lower overheads, know the local area, and often take more pride in their work because reputation matters to them. However, larger companies sometimes offer guarantees and predictable scheduling. The key is vetting whoever you hire — check their accreditations, insurance, and references regardless of size. A TrustMark-registered independent plasterer in Cardiff might give you more personal service and faster call-backs than a call centre 200 miles away. That said, don't dismiss bigger firms outright. Compare quotes, check credentials, and choose based on who inspires most confidence, not just who's cheapest or biggest.

Cardiff plasterers 2026 — Costs, Free Quotes, Vetted Pros

What plasterers do and why you might need one

Plastering is one of those trades that doesn't grab headlines until something goes wrong. A good plasterer will give you smooth, even walls and ceilings ready for decoration. A bad one leaves you with cracks, lumps and a nightmare to paint over.

In Cardiff, you'll need a plasterer for new builds, renovations, damp repairs, or just refreshing tired old walls. The city's mix of Victorian terraces, 1960s semis, and modern apartments means plasterers here deal with everything from ornate coving in period properties to flat ceilings in newer homes.

Plastering isn't a DIY job if you want professional results. It takes years to develop the eye for straightness, the arm strength, and the feel for the material. A plasterer will typically handle:

Skimming existing walls and ceilings
Dry lining (fixing plasterboard then finishing)
Plastering new blockwork
Coving and cornicing
Repair work on damaged plaster
Artex removal and replacement

The difference between an experienced plasterer and someone who's had a go is usually visible within weeks. Poor plaster work will crack, especially around joints and corners. It'll also drive your decorator mad, because uneven surfaces show under paint and wallpaper.

Before you call anyone, work out exactly what you need done. Is it a full room skim? New plasterboard and finish? Just repairs? Being clear upfront saves time and lets you get accurate quotes.

What plasterers charge in Cardiff — realistic 2026 prices

Plasterer costs vary wildly depending on the job complexity and your location in Cardiff. Here's what you should expect to pay in 2026:

Skimming existing walls or ceilings: £12-£18 per square metre. A typical bedroom might be £250-£450. If the existing surface is in poor condition, add 20-30% because the plasterer will need extra prep work.

Dry lining (plasterboard fixing and taping/jointing): £8-£14 per square metre for board and tape work alone. Full finish with skim coat runs £15-£22 per square metre. A small room might cost £400-£700.

New blockwork plastering: £20-£28 per square metre for two-coat work (render and finish coat). This is labour-intensive and takes longer, so prices reflect that.

Coving and cornicing: Expect £25-£40 per linear metre installed. Fancy period coving costs more. A 4x3m room might need 14 metres, so budget £350-£560.

Artex removal and replacement: £15-£25 per square metre because of the prep involved.

Call-out for repairs: Most plasterers charge £50-£100 for a visit, which may be refunded if you book the job. Small patch repairs typically cost £150-£300.

Always get three quotes. Prices vary because of material costs, travel time within Cardiff, and how busy the plasterer is. Cheaper isn't always better — you're paying for skill and experience. A rushed job will cost you more in the long run.

Checking qualifications and industry standards

Not all plasterers are qualified the same way, and some have no formal qualification at all. Here's what matters:

City & Guilds Level 2 or 3 in Plastering: This is the gold standard in the UK. It means the plasterer has completed an apprenticeship or equivalent training covering safety, techniques, and materials. Ask to see the certificate.

CSCS Card (Construction Skills Certification Scheme): Many plasterers hold this, especially those working on larger sites or commercial projects. It shows they've passed a health and safety test relevant to construction.

TrustMark Registration: This is a government-backed scheme. A TrustMark registered plasterer has been vetted, carries public liability insurance, and follows a code of conduct. If something goes wrong, TrustMark provides consumer protection. Check the register at trustmark.org.uk before hiring.

Public Liability Insurance: Non-negotiable. Ask to see proof. This protects you if they damage your property or injure themselves on your site. The cost is typically £100-£300 per year, so any plasterer without it is cutting corners.

References and past work: Ask for contact details of recent customers and photos of completed jobs. A confident plasterer will have these ready.

In Wales, some plasterers also work towards NVQs (National Vocational Qualifications), though City & Guilds is more common these days. Don't assume an experienced plasterer is unqualified — some older tradespeople trained before current schemes existed — but do ask questions about their training and experience.

Check their insurance is current and specifically covers public liability. Verbal promises aren't enough.

Plastering challenges specific to Cardiff

Cardiff's housing stock creates specific challenges for plasterers, and understanding them helps you hire the right person.

The city has thousands of Victorian and Edwardian terraced homes, particularly in areas like Cathays, Roath, and Canton. These older properties often have lime mortar, not cement. Modern gypsum plaster can crack on lime, so you need a plasterer who understands period properties and can specify lime-based plaster when needed. Ask if they've worked on Victorian homes.

Damp is a Cardiff issue, especially with the city's proximity to the Taff and rainfall levels. You'll see crumbly plaster, staining, and mould. A plasterer can repair the plaster, but they should advise if the underlying damp problem needs a surveyor or specialist. Don't let anyone just plaster over damp — it'll fail within months.

Many 1960s and 1970s properties have Artex ceilings. Removing this and replacing with modern plaster is common work in Cardiff, and it's dusty, time-consuming, and messy. Make sure your plasterer has proper containment and extraction equipment.

The city's newer estates (Pentwyn, Llanishen, Radyr) have modern brick and block, which is straightforward for most plasterers. But mixed-age properties sometimes have a mix of materials — brick, block, and occasionally stone — which requires flexibility.

Weather matters too. Welsh rain is relentless, and drying times for plaster are longer in damp conditions. A plasterer working in winter will take longer, and the cost may reflect that.

Local plasterers know Cardiff's building control requirements and which materials work best in the Welsh climate. They're also familiar with the common issues in different areas. Use this knowledge when hiring.

How to find and hire a plasterer in Cardiff

Here's a practical process that saves time and reduces the risk of hiring the wrong person:

Step 1: Define the work clearly. Measure the areas needing plastering. Take photos. Write down exactly what you need — new skim, repair, dry lining, coving, etc. This helps you get accurate, comparable quotes.

Step 2: Get recommendations. Ask neighbours, friends, or your builder if you're using one. Personal recommendations are worth their weight in gold. Check online reviews on Google and Trustpilot, but read them carefully — one bad review among ten good ones is normal; a pattern of complaints is a red flag.

Step 3: Get three quotes. Contact at least three plasterers. Provide the same information to each so quotes are comparable. A quote should be in writing, itemised, and include VAT.

Step 4: Vet them. Check TrustMark status, ask for references, verify insurance, and ask about qualifications. A plasterer who gets defensive about these questions is a warning sign.

Step 5: Agree terms. Confirm start and end dates, payment terms, site access, and whether they'll clean up after themselves. Get everything in writing, even if it's a simple email.

Step 6: Payment. Avoid paying the full amount upfront. Typical terms are 50% deposit and 50% on completion. For larger jobs, staged payments are reasonable.

Step 7: Inspect the work. Check the finish before final payment. Small defects are normal; major issues aren't. A good plasterer will come back to sort genuine problems.

Eight questions to ask before hiring

Use these questions to separate good plasterers from mediocre ones:

1. Are you registered with TrustMark? A yes answer with proof is a green light. No answer needs explanation — why aren't they?

2. Can you show me your City & Guilds or relevant qualification? Most professional plasterers carry copies. If they're evasive, be cautious.

3. How long have you been plastering, and what's your experience with properties like mine? A plasterer with 10 years' experience plastering new builds might be inexperienced with Victorian repairs. Match their experience to your needs.

4. Can you provide three recent references? Call them. Ask about quality, timeliness, and whether defects were corrected.

5. What's your typical drying time, and how do you account for weather? Winter and damp conditions slow drying. A plasterer who gives vague answers isn't thinking about the job properly.

6. Do you have public liability insurance, and can I see proof? Non-negotiable. Ask the amount covered — typically £1-£6 million.

7. What happens if I'm not happy with the finish? A good plasterer will offer to make good minor issues at no cost. Get this in writing.

8. What's included in your price — materials, labour, waste removal, site protection? Don't assume. Clarify everything to avoid surprises.