If your walls have cracks, holes, flaking paint, or damp marks, they need repair before painting. Not after. Painting over surface damage doesn't fix it. It hides it for a year or two, and then the same problem shows through the new coat. You end up patching and painting again.
A patch-and-paint job done properly means: assess the damage, fill and sand it back, prime the repaired areas, then topcoat. That's a real, priced job.
Most surface damage falls into three bands. Minor stuff (nail holes, hairline cracks, small chips) is quick to address. Medium damage (longer cracks, larger holes, peeling patches) is what most patch-and-paint jobs cover. Then there's damage that signals a problem behind the wall: recurring damp, mould that keeps coming back, cracks that have moved. That last type needs a cause fixed first. Painting over it is wasted money.
Most wall damage falls into three types, and getting the type right decides the job size
The first step in any patch-and-paint job is figuring out what you're dealing with, because the scope changes completely depending on the damage. Get this right and you hire for the right job. Miss it and you're repainting the same wall sooner than you expect.
Small surface damage (nail holes, small screw holes, paint chips, hairline cracks running less than a couple of millimetres wide) is the lightest category. It's real prep work, but it doesn't change the scale of the job much. A painter fills these during normal prep, sands them back, and carries on.
Larger cracks and holes are the middle band, and this is where most patch-and-paint jobs sit. Cracks wider than a couple of millimetres, runs that extend across a ceiling or wall, holes left by old fittings, areas of peeling or flaking paint that need scraping back before anything new will stick: all of this falls here. These take longer, often need multiple filler passes as the product cures and shrinks, and the repaired areas need proper priming before the topcoat goes on. This is the work that drives cost up.
The third type is a different problem entirely. Damp patches that dry out and reappear, mould that keeps coming back after cleaning, cracks that are wider at one end or that have moved: these are symptoms of something behind the wall. The surface repair is wasted work until the cause is fixed. That might mean a plumber for a leak, a waterproofing specialist for rising moisture, or a builder for a structural crack. That approach, cause first and surface second, is what a patch-and-paint job is for.
Filler needs time and primer before paint holds. Rushing either step loses the repair
If you're wondering whether you can paint over a patched wall the same day: you can't, not properly. Filler needs time to cure before it can be sanded and primed. Water-based paint is touch-dry in about 20 to 30 minutes and ready to recoat in roughly two hours, but filler takes longer than paint to cure, and deeper fills take longer still.Dulux TradeView source Rush the drying and the surface moves as it finishes curing, which cracks the coat on top. You've done the repair twice.
What a patch-and-paint job looks like, done properly: a painter assesses the damage, cuts back any loose or flaking paint to a firm edge, fills the damage in layers if it's deep, sands it back smooth when cured, then spot-primes the repaired areas before the topcoat goes on. The priming step is what most homeowners skip in a DIY attempt. Skip that step and the colour won't match.
Primer seals the filler so it doesn't absorb the topcoat differently to the surrounding wall. Without it, repaired areas show as dull patches even under the same paint: a duller sheen, slightly different colour, sometimes a slightly different texture. The repair looks finished and it still shows.
Do you need to sand before painting? Yes, for two reasons. Repaired areas need sanding smooth once the filler cures. And a light sand across the whole surface between coats helps each coat key in for a better finish. Do you need to fill cracks before painting? Yes. Any crack visible at normal standing distance will read through a fresh coat if it isn't addressed first.
Paint can't hold on a surface it can't grip, which is why skipping prep means doing the job again
The reason patch-and-paint matters isn't that painters insist on it. It's that paint can't perform on a substrate it can't grip. Even a premium exterior system like Dulux Weathershield is only guaranteed against peeling, flaking and blistering when it's 'applied and maintained in accordance with the product instructions, to a suitable and sound substrate'.DuluxView source The guarantee goes away the moment the surface isn't sound. The same principle runs through every interior job.
A crack filled but not cured and primed will telegraph through the topcoat as the filler moves. A loose edge not cut back will lift and take the new paint with it. Flaking paint painted over rather than removed keeps coming off, taking the new coat with it. These aren't hypotheticals. They're the reason patch-and-paint is a job booked on its own, not a line item folded silently into a repaint quote.
So when you're getting quotes for painting, check what the surface prep actually includes. A quote that prices a room without mentioning repair or priming is often pricing a thin pass over a surface that needs more work first.
Damage that keeps coming back usually has a cause behind the wall. Patch without fixing it and you'll just repaint it
Some wall damage isn't surface damage. Damp patches that dry and reappear in the same spot, paint that peels within a year of being redone, mould that returns after every clean: these signal something behind or beneath the wall. A slow leak, rising moisture, poor drainage, a ventilation problem. Patching the surface without fixing the cause means the same damage is back through the new coat within months.
If peeling paint keeps coming back, the peeling and blistering guide covers why it happens and what to do about it. If you're dealing with mould or watermarks on your walls, the mould and stains guide explains when a paint treatment helps and when the moisture source has to be fixed first.
For structural cracks (wide, diagonal, stepped through brickwork, or that have moved since you last looked), a builder or structural engineer should assess the cause before any cosmetic repair starts. A painter fills and topcoats after that assessment. They can't determine whether a crack is structural. Getting the trades in the right order protects the repair.
One more consideration for older homes. Houses built before 1970 commonly used high-lead paint, and paint made before 1965 could contain as much as 50 per cent lead.DCCEEWView source You can't tell by looking. So for any older home where sanding, scraping or disturbing old paint is part of the repair scope, a lead assessment by a licensed professional comes first. Not DIY sanding. Disturbing lead paint without the right precautions is a health risk. The patch-and-paint job starts after that assessment, not before.
What does patch-and-paint cost?
This is the typical cost range for a patch-and-paint job in Australia. Your number depends on the extent of the damage, how many areas need repair, and whether underlying issues need addressing first.
Patching walls before painting: common questions
A licensed painter assesses the damage, cuts back any loose or flaking material to a firm edge, fills the area (in layers for deep damage), lets it cure and sands it back smooth, then spot-primes the repaired areas before the topcoat. The priming step is the one most often skipped in a DIY attempt. It's also the one that makes the colour and finish match the rest of the wall.
Yes, but only after the filler is fully cured and sanded back, and the repair primed. Each layer needs drying time. A water-based topcoat is touch-dry in about 20 to 30 minutes and ready to recoat in roughly two hours, but filler takes longer to cure than paint.Dulux TradeView source Rush it and the surface moves as it finishes drying, cracking the coat on top.
Yes, for two separate reasons. Repaired areas need sanding smooth once the filler cures. And a light sand across the whole surface helps the next coat key in and gives a cleaner final finish. Your painter handles both as part of the normal prep scope.
Yes. Any crack wide enough to see at normal standing distance will show through a fresh coat if it isn't filled first. Hairline cracks can be addressed quickly. Wider cracks or those that have moved need filling in layers as the product cures, then sanding and priming before the topcoat goes on.
The full prep sequence is: fill and repair any damage, sand back the repairs and the surface, clean the walls, prime repaired areas or bare surfaces, then apply the finish coats. The fill-and-repair step is what most people think of as patch-and-paint. It's the foundation everything else sits on. Without it, even a premium paint system won't hold on a damaged surface.DuluxView source
A typical patch-and-paint job covers: assessing the damage, cutting back loose or flaking paint to a firm edge, filling holes and cracks, sanding smooth when cured, priming the repaired areas, and applying finish coats to the affected surfaces. The exact scope depends on the extent of the damage. One or two nail holes is very different from a wall where the paint has been peeling across the whole surface.
Not safely, and not permanently. Surface mould that keeps coming back points to moisture behind the wall: a source that needs fixing before the surface is touched. Active damp and large mould problems are a professional call, not a DIY repair. Once the moisture source is fixed, a licensed painter handles the patch-and-paint. For older homes, any scraping or sanding near old paint layers also needs a lead assessment first.DCCEEWView source
Ready to get your walls sorted before painting?
Get a fair-price estimate for a patch-and-paint job, then connect with vetted local painters who'll assess the damage and quote the repair. The finish coat goes on a surface that's actually ready for it.
Sources
General information to help you plan a wall repair and painting job, not a substitute for advice from a licensed painter. Lead-paint safety guidance is attributed to DCCEEW. Safety and compliance determinations belong to a licensed professional.
- Haymes PaintView source
- TaubmansView source
- Dulux TradeView source
- DuluxView source
- DCCEEWView source
- SafeWork NSWView source
- Haymes PaintView source