Common Painting Problems in Melbourne’s Older Homes

Older homes in Melbourne’s established suburbs carry a lot of charm, but they also carry a paint history that a 1990s brick-veneer house simply doesn’t. When someone in Toorak, Malvern or Brighton asks us why the last paint job failed so quickly, the answer usually isn’t the paint at all. It’s what was going on underneath: old lead-based coatings, tired lime plaster, chalky heritage render, or damp that’s been quietly working through the walls for decades. This guide walks through the painting problems that are specific to older homes, why they happen, and how they should actually be handled. If you’re weighing up who to bring in for the job, our house painters in Toorak deal with period homes across the inner and bayside suburbs regularly.

Lead Paint: What to Check Before Repainting a Pre-1970s Home

This is the single most important issue in any older Australian home, and the one most often ignored. Paint sold before 1970 frequently contained high levels of lead, and homes painted up to the late 1990s can still have lead in the older layers underneath. As long as that paint is sound and left undisturbed, it’s generally low risk. The danger comes from sanding, scraping or heat-stripping it, which releases lead dust.

Before any prep starts on a period home, it’s worth testing the existing coatings. DIY lead paint testing kits are available in Australia and give a quick indication, though a professional assessment is more reliable on a house with many paint layers. If lead is confirmed, the surfaces should be handled using lead-safe work practices, not dry-sanded in the open. The Australian Government’s Lead Alert: The Six-Step Guide to Painting Your Home is a useful reference on safe handling. This isn’t a step to skip to save time, and it’s a fair question to ask any painter quoting on an older home: how do they plan to deal with the existing paint?

Peeling and Flaking on Old Plaster Walls

Interior walls in older homes are often lime or lath-and-plaster rather than modern plasterboard, and they behave differently under paint. Peeling and flaking on these walls usually trace back to one of three things: moisture moving through the wall, previous coats applied over a chalky or unstable surface, or too many layers of old paint that have lost their grip on each other.

Fixing it properly means removing the loose material back to a sound edge, addressing any moisture source first, and re-sealing bare plaster before repainting. Painting straight over flaking paint just buys a year or two before the same patch lifts again. For a full breakdown of how surfaces should be prepared before the brush comes out, our wall preparation guide covers the steps in detail.

Chalky Exterior Surfaces on Heritage Homes

Run your hand down the render or weatherboard of an older home and if a fine powder comes off on your palm, the surface is chalking. It’s the paint film breaking down under years of UV exposure, and it’s extremely common on heritage exteriors that haven’t been repainted in a decade or more. The problem is that fresh paint won’t bond to a chalky surface. It sits on top of the loose powder and fails early.

The fix is thorough cleaning to remove the chalk, followed by the right primer or binding sealer made for powdery surfaces before the topcoats go on. Skipping the sealing step on a chalky heritage wall is one of the most common reasons an expensive repaint peels within a couple of years. Our guide on whether you need to prime before painting explains when a binding primer is non-negotiable.

Bubbling Paint and Recurring Mould in Damp Older Homes

Older Melbourne homes weren’t built with modern moisture barriers, so bathrooms, laundries and south-facing rooms are prone to damp. Two problems follow from that: paint that bubbles or blisters as moisture pushes up from behind the film, and mould that keeps coming back no matter how many times it’s painted over.

Painting over mould with standard paint never works, because the spores are still active underneath. The surface has to be treated and the moisture source identified first, and a mould-resistant coating used in the wet areas. Bubbling is a similar story, it’s a symptom of trapped moisture, so the cause has to be found before the wall is refinished rather than just re-coating the blistered patch.

Cracked Render That Needs Repair Before Repainting

Cement and lime render on older homes cracks over time as the building moves and the render ages. Hairline crazing is often cosmetic, but wider cracks let water in behind the render, which then pushes paint off from the inside and worsens the crack. Painting over an active crack hides it for a season and no longer.

The right sequence is to open up and repair significant cracks, allow the repair to cure, then use a flexible exterior system that can handle a little ongoing movement. On heritage homes it also matters that the repair material is compatible with the original render, as a hard modern patch on soft old render can crack again at the edges.

Best Paint for Old Weatherboard in Coastal Suburbs

Weatherboard homes near the bay, in Brighton, Port Melbourne and the wider coastal strip, face the toughest conditions of any older home in Melbourne: salt air, strong UV and timber that expands and contracts constantly. The paint has to move with the timber without cracking, resist salt breakdown, and hold colour under harsh sun.

That means a quality exterior acrylic system built for Australian conditions, over properly prepared and primed timber, with particular attention to end-grain and joints where water gets in first. It’s worth remembering that even the best paint on old coastal weatherboard has a shorter realistic lifespan than the same paint inland, so these homes benefit from being inspected a little sooner.

What It Costs to Repaint an Older Home

Repainting an older home almost always costs more than an equivalent modern house, and the reason is the prep, not the paint. Lead-safe handling, plaster repair, chalk removal, mould treatment and render crack repair all add labour before a single topcoat is applied. A quote that comes in surprisingly low on a period home is usually a quote that’s skipping some of that preparation. For a realistic picture of what full-house painting involves, our house painting cost guide for Melbourne breaks down the factors that move the price.

When Should You Call a Professional Painter?

A straightforward repaint can be a reasonable DIY job when the existing surface is stable, clean and in good condition. Professional assessment matters a lot more when you’re dealing with unknown old paint layers, significant peeling, recurring moisture, mould that keeps returning, extensive plaster damage, widespread chalking, cracked render or deteriorated weatherboards. With older homes, working out why the previous paint job failed is usually more important than picking the next colour, and that diagnosis is where an experienced eye pays for itself.

Related Articles

If your home is an older one, these guides go deeper on the decisions involved:

• House Painters in Toorak
• Wall Preparation for Painting
• Do I Need to Prime Before Painting?
• How Much Does It Cost to Paint a House in Melbourne?