If your walls are cracked, bumpy or covered in old wallpaper scars, a skim coat is usually the fix, and the first question is always what it will cost. Prices vary more than most people expect, so this guide breaks down realistic per room figures for Liverpool and the North West and explains what pushes a quote up or down.
Skimming means applying a thin finishing coat of plaster, usually 2 to 3mm, over existing plaster or plasterboard to leave a smooth surface ready for paint. It is cheaper than full replastering because the old backing stays in place.
As a rough guide for Liverpool and the wider North West, a small room such as a box bedroom typically costs somewhere in the region of £150 to £250 for walls only. A standard double bedroom or average living room tends to land between £250 and £400, while a large through lounge or open plan space can reach £400 to £600. Adding the ceiling usually puts another £100 to £200 on top, as overhead work is slower and harder on the plasterer. These are guide figures rather than fixed prices, because every room is different once you look closely at the walls.
Two rooms of the same size can be quoted quite differently, and it usually comes down to the condition of what is already on the walls. A sound, stable surface that just needs a bonding agent and a skim is the cheap end. Blown or hollow patches, flaking paint, heavy Artex or layers of old wallpaper paste all add preparation time, and preparation is where most of the labour goes.
In older Liverpool housing stock, particularly Victorian and Edwardian terraces around areas like Wavertree, Anfield and Aigburth, it is common to find original lime plaster that has come away from the brick in places. If large areas are loose, skimming over the top is a false economy and you may be quoted for hacking off and reboarding instead, which costs more but lasts.
Skimming only works if the surface underneath is solid. A quick test is to tap the wall with your knuckles: a dull, hollow sound suggests the plaster has separated from the wall behind it. Small hollow patches can be cut out and filled before skimming, but if half the wall sounds hollow, a skim will simply crack as the old plaster continues to fail.
Full replastering, meaning hacking off back to brick and starting again, or overboarding with new plasterboard, typically costs two to three times as much as a skim for the same room. It is worth it where damp has damaged the plaster or where old lime plaster is past saving. Any decent plasterer will tell you honestly which route the room needs rather than skimming over a problem.
Ask for a written quote that states what is included: preparation, PVA or bonding agent, the skim itself, and rubbish removal. A vague verbal figure over the phone is rarely reliable because the price genuinely depends on seeing the walls. Most plasterers in the Liverpool area will visit and quote for free, and comparing two or three quotes gives you a feel for the going rate.
On the day, a single room is usually skimmed in one visit. Fresh plaster then needs to dry before decorating, typically 3 to 7 days depending on the weather and how well the room ventilates. It should dry to a uniform pale pink; dark patches mean it is still damp. Use a mist coat, which is watered down emulsion, as the first coat of paint, otherwise standard paint can peel off the new surface.