5 Signs Your Walls Need a Plasterer, Not Just a Paint Job

A fresh coat of paint can hide a lot, but not everything — and painting over a wall that actually needs re-plastering usually just delays the problem while making it slightly worse. Target Plastering, based in Forrest Hall, deals with exactly this kind of wall regularly. Here are the signs worth watching for, counting down to the most urgent.

5. Fine hairline cracks appearing after a paint job

A few thin cracks appearing within weeks of a repaint, especially around corners or ceiling joints, often point to minor movement or ageing plaster rather than anything serious, but they're worth keeping an eye on rather than simply repainting over again next time.

4. A powdery or chalky surface when you touch the wall

Old lime plaster or plaster that's reached the end of its life can develop a slightly powdery surface, where a hand brushed against the wall picks up fine dust. This is a sign the surface is deteriorating and won't hold a new coat of paint reliably for long.

3. A hollow sound when you tap the wall

Gently tapping across a plastered wall and listening for a change in sound is a simple, genuinely useful test — a hollow or drum-like sound in one area compared to a solid sound elsewhere suggests the plaster has started to separate from the wall behind it, even if it looks fine visually.

2. Visible bulging or bowing in the wall surface

A wall that looks slightly warped or bulges out from flat, especially when viewed at a raking angle in low light, is a stronger sign that plaster has already lost its bond to the surface underneath and is at risk of coming away.

1. Chunks of plaster actually coming away from the wall

Once plaster starts physically detaching in pieces, there's no ambiguity left — this is the clearest sign that re-plastering, not redecorating, is needed. Leaving it tends to mean more of the surface fails over time, turning a contained repair into a larger area needing attention.

What to do once you've spotted these signs

One or two hairline cracks are usually nothing urgent. Powdery surfaces, hollow sounds, bulging, or actual plaster loss are all signs it's worth getting a proper assessment before painting over the problem again, since fresh paint on failing plaster rarely lasts and can make the eventual repair more disruptive.

Target Plastering, based in Forrest Hall, takes on plastering and re-plastering work for homes across the area — worth a call if any of the signs above sound familiar.