A fresh coat of paint can transform a room, but it will not hide every problem underneath. Cracks, loose plaster and uneven surfaces can still show through once the decorating is finished.
The good news is that a damaged wall does not always need to be completely replastered. Depending on its condition, a small repair or a new skim coat may be enough. The important first step is understanding what is causing the damage and choosing a suitable way to deal with it.
Here is what homeowners should consider before arranging plastering work.
Start by checking the condition of the wall
Look beyond the most obvious crack or hole. Check for areas where the surface is crumbling, bulging or coming away from the wall. Peeling paint, staining and a musty smell can also point to a moisture problem that needs investigating.
Some defects are easier to spot after wallpaper has been removed or furniture moved away from the walls. It is worth checking the whole room before booking a decorator, particularly if you are planning other renovation work.
If a crack keeps returning, is getting wider or is accompanied by movement, ask a suitable professional to investigate the cause before covering it. Plastering can improve a surface, but it cannot solve an underlying structural issue.
When a plaster repair may be enough
Local repairs are often suitable when most of the plaster is sound and the damage is limited to a small area. Common examples include holes left by shelves, damaged corners and the channels cut into walls for electrical or plumbing work.
The damaged area needs to be prepared properly before it is filled or replastered. Depending on the size and position of the repair, the surrounding wall may also need some attention to help the new surface blend in.
For a small job, the key question is whether the existing plaster around the damage is still firm. If it is loose or crumbling over a wider area, a larger repair may be needed.
When skimming makes sense
Skimming involves applying a thin finishing coat of plaster to a suitable existing surface. It can be a practical option when a wall is generally sound but has minor imperfections, uneven patches or an old finish that is difficult to decorate.
The existing surface must be stable and properly prepared. A plasterer will consider its condition, including whether old paint or other finishes will affect how the new plaster bonds.
A skim coat will not fix loose plaster, active damp or significant movement underneath. Those issues need attention first. If only one wall is affected, it may be possible to skim that wall rather than the entire room, depending on the finish you want.
When more extensive plastering may be needed
Some walls need more than a surface repair. Large areas of loose or badly damaged plaster, for example, may need to be removed and replaced before a new finish can be applied. In some renovation projects, plasterboard may be an appropriate part of the solution.
Ceilings need particular care. If plaster is sagging, visibly loose or at risk of falling, keep clear of the affected area and seek professional advice rather than disturbing it yourself.
The amount of work will depend on what is found during an inspection. A plasterer can explain which parts can be retained and which need further preparation.
Deal with damp before covering it
Damp patches, water stains and mould should not simply be hidden under a new layer of plaster. If the source of moisture is still present, the damage can return.
Possible causes include a leaking pipe, defective guttering, water entering through the building or condensation caused by poor ventilation. Identifying the cause is important because each problem calls for a different response.
The UK government’s guidance on damp and mould, written for landlords and housing providers, emphasises the need to address underlying causes rather than only remove visible mould.
Once the cause has been dealt with, affected materials may need time to dry or further treatment before plastering can begin. Ask an appropriately qualified professional for advice if the source is unclear or the damage is extensive.
Take extra care with older properties
Older homes can have different wall construction and plaster materials from modern properties. Some use traditional lime plaster, for example, and the right repair depends on the existing materials and how the wall manages moisture.
If you are unsure what is on the wall, seek advice from someone experienced with older buildings before removing it or covering it with a new finish. If the property is listed, check with your local planning authority whether consent is needed before altering historic plasterwork.
Plan plastering around the rest of the renovation
The order of work can make a noticeable difference to the finished result. If you are moving sockets, adding lighting or changing pipework, arrange for that work to be completed to the appropriate stage before the final plaster finish is applied.
It is also helpful to tell the plasterer if you are planning new skirting boards, fitted furniture or wall-mounted fittings. This allows everyone involved to agree on the sequence and reduces the chance of newly finished walls being damaged.
For homeowners planning plastering work in Hothfield, Argo Contractors offers plaster repairs, skimming and plasterboard installation. Discussing the project in advance can help establish what preparation is needed and when the plastering should take place.
Allow time for the plaster to dry
Fresh plaster needs to dry fully before it is decorated. The time required varies with the thickness of the plaster, the room temperature, ventilation and the condition of the wall underneath.
Plan for this drying period when arranging painters, flooring installers or the return of furniture. Follow your plasterer’s advice and the paint manufacturer’s instructions on preparing and priming new plaster before applying the final coats.
Ask for a clear quote
Before work starts, ask what the quote includes. Will loose material be removed? Is plasterboard or extra preparation required? Does the price cover one wall, the ceiling or the whole room? It is also useful to check how the area will be protected and what cleaning up is included.
If you are unsure which approach is right, arrange for the walls to be assessed before making a decision. A clear explanation of the work can help you plan the project and avoid paying for repairs the room does not need.