If you’ve noticed cracked plaster on a wall or ceiling, the first question is usually who should fix it. The short answer is: it depends on the type of crack, how deep it is, and whether the surface needs repair before painting.
For many Auckland homes, the job can involve both plastering and painting. A good trade-qualified painter will know when a crack needs a plaster repair first, and when the surface can be prepared and painted after a proper patch and sand.
Which trade fixes cracked plaster?
Small surface cracks are often handled by a plasterer or by a painter with strong prep and repair skills. For cosmetic cracks in interior walls and ceilings, the most suitable trade is usually a plasterer, especially if the crack needs filling, stopping, and re-stopping to blend into the surrounding surface.
If the crack is part of a larger painting project, a painter-decorator may manage the repair process as part of the prep work. In practice, many homeowners want one trade to assess the damage, explain the cause, and complete the finish properly so the repair does not flash through the paint later.
- Hairline cracks: often repairable with filler, stopping compound, and sanding
- Wider or repeated cracks: may need plasterboard movement checked first
- Cracks around windows or doors: could be related to settling or timber movement
- Ceiling cracks: often need careful inspection before any paint goes on
Why plaster cracks happen
Cracked plaster is common in older homes, especially where the building has naturally moved over time. Even newer homes can develop cracks if there is shrinkage, vibration, moisture, poor original plastering, or movement in the framing.
A proper repair starts with understanding the cause. If you just fill over the top without addressing the movement, the crack may return. That is why a careful inspection matters before any patching or painting begins.
In Auckland, fluctuating humidity and older villa or bungalow construction can make cracking more noticeable. That does not automatically mean there is a major problem, but it does mean the repair should be done properly and finished to a high standard.
- Normal settling in older homes
- Moisture damage or past leaks
- Poor workmanship from an earlier repair
- Temperature and humidity changes
- Structural movement that needs further checking
What a proper cracked plaster repair involves
A neat finish is about more than filling the line you can see. The damaged area usually needs to be opened up slightly, cleaned, stabilised, filled with the right compound, sanded smooth, and then sealed before painting.
If the repair is rushed, the patch may show through the topcoat, especially in side light. This is one reason prep is such an important part of painting and decorating. Good preparation gives you a finish that looks consistent across the whole wall or ceiling.
Depending on the crack, the work may include:
Removing loose material and dust
Applying a suitable filler or stopping compound
Sanding and feathering the edges
Sealing the repair before repainting
Checking surrounding surfaces for other signs of movement
When to call Steve
If you are unsure what trade for cracked plaster is right for your home, it is worth getting advice before you start patching. Steve is a Kiwi and a trade-qualified painter, and he can assess whether the crack is a simple cosmetic repair, a plastering issue, or something that needs a closer look before painting.
That is especially helpful in premium Auckland homes where the finish matters and small defects can stand out quickly under natural light. Steve can advise on the right prep, coordinate the repair approach, and make sure the final paintwork sits neatly and lasts well. If you want the job assessed properly, contact Steve, a Kiwi and a trade-qualified painter, for practical guidance and a professional result.
Frequently Asked Questions
Do I need a plasterer or a painter for cracked plaster?
For minor cracks and painting prep, a trade-qualified painter may handle the repair. For deeper, wider, or recurring cracks, a plasterer may be needed first.
Can I just paint over cracked plaster?
Not usually. If the crack is not repaired and sealed properly, it may show through the paint or reopen later. Good prep is essential.
How do I know if a crack is serious?
If the crack is widening, keeps coming back, appears near doors or windows, or comes with sagging, staining, or dampness, it should be inspected before repair.
Need a hand with your project?
Happy to tackle some of it yourself? Great — but for anything you’d rather leave to a professional, Steve Lunjevich is a Kiwi and a trade-qualified painter with 20+ years’ experience. Call or email for honest advice or a free, no-obligation quote.