After completing over 150+ room re-skims across Bristol and Bath, we’ve found that while roughly 60% of our quotes come in within the price most guides quote, the other 40% jump by £150-£300+ once we strip back wallpaper and find what’s underneath.

What most plastering cost guides say vs what we’ve found

Most online guides give a wide commodity figure, suggesting plastering costs between £15-£60 per square metre. For an average 3x4m room, this often translates to a ballpark of £630-£700. While not wrong, this figure usually only accounts for a straightforward skim over perfect walls—a scenario we find in only about half of Bristol and Bath homes.

Why 40% of quotes change after the survey

The most common mistake we see is homeowners getting quotes over the phone without anyone seeing the walls, then being surprised when the final price changes once prep work is added. An on-site survey prevents this. It allows us to spot issues that a phone call can’t, which is why we always survey before providing a final price. Understanding what we look for can help you set a realistic budget. For more details on what a good quote includes, see our guide on plastering quotes and how to compare them.

Blown plaster behind wallpaper

Hidden damp or staining

Patches of damp or water stains are often hidden behind furniture, thick wallpaper, or layers of paint. Plastering directly over damp is a recipe for failure, as the moisture will prevent the new plaster from curing and will eventually cause it to fail. These areas must be treated with a damp-proof membrane or specialist sealer first, which is an additional step not included in a standard skimming price.

Artex or textured ceilings and walls

Many properties built or renovated before the 2000s have Artex or other textured finishes. While it’s possible to skim over a stable Artex surface, it requires more material and a slightly different technique than skimming a flat wall. Crucially, if the Artex is old and needs to be disturbed or removed, it must be tested for asbestos. Asbestos testing and potential specialist removal is a separate, legally required process that is never included in a standard plastering quote. You can find official guidance at the UK Health and Safety Executive (HSE).

Uneven or out-of-true walls

Older Bristol and Bath properties, in particular, rarely have perfectly flat walls. Years of paint, previous DIY repairs, and settlement can lead to bows and dips. A thin 2mm skim coat won’t fix this. Achieving a flat finish might require building up areas with a bonding coat, or in severe cases, installing plasterboard over the existing wall using the ‘dot and dab’ method. This turns a simple skimming job into a more involved plastering project.

What’s included in a plastering quote

Day 1: prep and backing coat

For jobs that require more than a simple skim, the first day is all about preparation. This involves laying down dust sheets to protect floors and furniture, stripping any remaining wallpaper, and hacking off areas of blown plaster. Once the walls are clear, we apply a backing coat (like British Gypsum’s Thistle Bonding Coat) to build the surface back up. This needs time to set before the final skim can be applied.

Day 2: finish skim and drying

Day two is for the finish. We apply one or two thin coats of finish plaster (typically British Gypsum Multi-Finish) to create a smooth, flat surface. This is trowelled multiple times to achieve the desired polish. A straightforward skim on sound walls can often be a one-day job. Once complete, the plaster needs to dry. This can take anywhere from 2 to 5 days, depending on the room’s temperature and ventilation.

What’s usually included vs excluded

A transparent quote will clearly separate these items. Our plastering quotes always detail what is and isn’t covered.

Included:

• All plastering materials (backing and finish plaster)

• Protective dust sheets for the work area

• Labour for a standard two-coat skim finish

• Filling of minor cracks and holes

• Corner beading for sharp, durable edges

Excluded:

• Wallpaper stripping

• Removal of furniture from the room

• Damp treatment or sealing

• Skip hire for extensive waste removal

• Final decorating (painting and priming)

• Asbestos testing or removal

Skimming vs full plastering vs Venetian finishes

Skimming over sound plaster

Skimming is the application of a 2-3mm finish coat over existing plaster or plasterboard. It’s fast and cost-effective, but only suitable if the walls underneath are stable, dry, and relatively flat.

Full re-plaster and dot-and-dab

If the existing plaster is blown or the walls are very uneven, a full re-plaster is needed. This involves either hacking off the old plaster and applying new backing and skim coats, or fixing new plasterboard directly to the wall (dot and dab) and skimming over that. This is more expensive and has a longer drying time.

Venetian and decorative finishes

As specialists in Venetian plastering in Bristol and Bath, we offer this as a high-end, decorative alternative. Venetian plaster is a lime-based putty that creates a stunning, marble-like finish. It’s a multi-layered, artisanal process and is significantly more expensive than standard skimming. You can learn more about the investment in our Venetian plaster cost guide.

Room size and job type cost breakdown

Costs vary based on location, with London and the South East typically being 15-20% more expensive than Bristol and the South West. The table below gives a rough idea for our region, assuming standard prep work is needed.

For a wider view on UK pricing, trade resources like Checkatrade provide regional breakdowns.

How to get an accurate plastering quote

After completing over 150+ room re-skims, the best advice I give customers is this: always get the price broken into “skim only” vs “skim + make good”. A quote for skimming alone is easy to give, but the “make good” part—dealing with blown plaster, damp, or uneven walls—is where costs can change. A professional who surveys the job first will be able to give you a fixed price for both, so you know exactly what you’re paying for.

FAQ

How much does it cost to plaster a small room?

A basic skim on a small UK bedroom might be quoted around £400-£500. However, as our findings show, if that room has hidden issues like blown plaster, the final cost could easily rise to £600-£700 once the necessary prep work is included.

Why did my plastering quote increase after the survey?

This is a common issue for homeowners who get initial quotes over the phone. The price increases because the survey uncovered extra work not visible at first glance, such as blown plaster, hidden damp, the need to skim over Artex, or very uneven walls that require boarding.

How long does plastering take to dry?

A skim coat is usually touch-dry in 24-48 hours, but it needs to dry fully before you can paint. This typically takes 3-7 days, depending on the thickness, background material, and ventilation in the room. The plaster will change from dark brown/grey to a light, uniform pinkish colour when fully dry.

Is Venetian plaster more expensive than standard skimming?

Yes, significantly. Standard skimming is a functional wall covering, whereas Venetian plaster is a luxury, artisanal finish requiring multiple layers and specialist skills. It is priced as a decorative feature, not a standard wall finish. You can see a comparison with other finishes like tiling in our guide, is Venetian plaster cheaper than tiling?.

Does my plastering quote include removing wallpaper?

Usually, no. Wallpaper stripping is considered a separate decorating task and is typically listed as an exclusion or an optional extra on a plastering quote. Always confirm this with your plasterer.

What is blown plaster and how do I know if I have it?

Blown plaster is plaster that has detached from the wall behind it. You can often identify it by tapping on the wall – if you hear a hollow, papery sound instead of a solid thud, the plaster is likely blown and will need to be hacked off before re-plastering.

Do I need asbestos testing before removing Artex?

Yes. If your property was built before 2000, any Artex or textured coating should be assumed to contain asbestos until tested by a UKAS-accredited laboratory. A plasterer cannot legally or safely scrape or sand it without a negative test result.

How many quotes should I get for plastering?

Getting 2-3 quotes is wise, but focus on the detail, not just the price. Ask each plasterer to break down the cost into a “skim only” price and a “skim + make good” price. This helps you compare apples with apples and understand the potential costs if the walls are in poor condition.