Small cracks, bubbling plaster or a rough, patchy finish are often the first things homeowners notice — and they’re the sort of issues that make a room look tired. What many people don’t realise is that plastering is not just cosmetic: good plastering protects walls from moisture, improves thermal performance, and forms part of a long-term maintenance plan for your property. This article explains the common plaster problems, their causes, when a DIY fix will do, and why professional plastering is worth the investment.
Why plastering matters beyond appearances
A properly prepared and finished plaster surface does more than look smooth. It creates a stable substrate for paint and wallpaper, helps reduce drafts around joints, and seals internal finishes against moisture moving from the structure into living spaces. Poor or inappropriate plaster can trap moisture, lead to delamination (hollow sounding patches) and accelerate decay in older buildings—so choosing the right material and technique for your home is essential.
Common plaster problems homeowners see
- Hairline cracks – typically caused by minor settlement, thermal movement or shrinkage in new plaster.
- Blown or bulging plaster – areas where the plaster has detached from its background, often following water ingress or poor bonding.
- Flaking and powdering – signs that the wrong plaster or paint has been used, or that moisture has affected the surface.
- Water stains and mould – indicate leaks or rising/penetrating damp and require investigation before repairs.
- Hollow patches – areas that sound hollow when tapped, suggesting delamination and a need for removal and re-keying.
What usually causes these problems?
There’s rarely one single cause. More often, issues are the result of a combination of factors: existing damp or leaks, thermal movement, previous poor repairs, or the use of incompatible materials (for example, cement-based plaster over historic lime substrates).
In older properties, using hard cement mortars can restrict breathability and cause soft, historic plasters to fail—this is why specialist advice is important for period homes.
DIY repairs: what you can do and when to stop
Small holes, fine cracks and superficial scuffs can often be patched with a quality filler or a thin skim. For straightforward step-by-step advice on small repairs, see this plaster repair guide (opens in a new tab). Plaster Repair Guide — JT Atkinson.
However, you should call a professional if you find:
- Large areas of blown or delaminated plaster
- Recurring cracks after previous repairs
- Signs of damp, staining or mould
- Issues on historically sensitive surfaces (e.g. lime plaster)
What good professional plastering looks like
A competent plasterer begins with a thorough inspection and prepares the background correctly. That may include removing failed plaster, treating any damp sources, and selecting the right material—gypsum-based skims for modern builds, or breathable lime plasters for older, solid-wall homes. Prep work often involves bonding coats, reinforcing mesh where needed, and finishing with a true skim to the required smoothness standard (BS guidance helps define acceptable finishes).
For conservation and breathability issues, Historic England provides useful guidance on traditional materials and repair approaches (opens in a new tab). Historic England – guidance.
How Go2 approaches plastering work
At Go2, our plastering work starts with a clear assessment. We identify any underlying causes—damp proofing, timber decay or structural movement—and include those in our specification. Our process covers everything from patch repairs and artex removal to full re-skims and traditional lime plastering where appropriate. We match materials to the building and guarantee a clean, long-lasting finish. See our plastering service page for details and examples: Go2 Plastering services.
Maintenance and preventing future problems
- Fix leaks and blocked gutters promptly to prevent water reaching plastered surfaces.
- Avoid painting over new plaster too soon—allow adequate drying and follow the painter’s recommendations.
- Inspect plaster annually for new cracks or staining and address issues early.
- For older or historic homes, use breathable finishes and consult a specialist before using cementitious materials.
When to get a professional survey
If plaster defects are widespread, accompanied by damp or mould, or keep returning after patch repairs, arrange a survey. A surveyor or experienced plastering contractor will diagnose the cause and recommend a lasting repair. For practical, step-by-step DIY tips on simple wall repairs, the Wickes guide is helpful (opens in a new tab). How to repair a wall — Wickes.
Conclusion
Plastering protects both appearance and fabric. While some small repairs suit a confident DIYer, most lasting solutions depend on correct diagnosis and using the right materials. If you’re seeing recurring cracks, large hollow areas or water-damaged plaster, it’s wise to get expert advice. Go2 Property Services offers professional surveys and plastering repairs across Surrey, London and Berkshire—contact us for a no-obligation quote and a practical plan to restore your walls.
Call: 01483 379 061
Email: info@go2.services
Learn more: Go2 Plastering services