Balcony and Balustrade Coatings in Melbourne Strata

Balconies are the part of an apartment building that fails first. They are exposed on more sides than any other element, they carry water, they take direct sun and driving rain, and on many Melbourne buildings they were detailed optimistically.

For an owners corporation planning a repaint, balconies and balustrades deserve to be assessed separately from the rest of the facade rather than being folded in as an area rate. Here is why, and what to look for.

Coating is not waterproofing

This is the distinction that causes the most confusion and the most wasted money.

A decorative coating on a balcony soffit or wall is a finish. A waterproofing membrane under the balcony floor finish is a building element that keeps water out of the structure. They are different products doing different jobs, and painting cannot substitute for the second.

When water is getting into a balcony slab, the symptoms appear as staining or deterioration on the soffit below, efflorescence, or spalling where reinforcement in the concrete has begun to corrode and expand. Painting the soffit makes those symptoms disappear for a while. The water keeps coming, and the next time the symptoms appear the underlying damage is worse.

Any scope that proposes coating a soffit showing those signs, without investigating why water is getting in, is deferring a problem rather than addressing it. An owners corporation that approves it has usually paid twice by the time it is properly resolved.

What to look for during inspection

Spalling concrete

Concrete breaking away, often with rust-stained cracks running in a line, indicates reinforcement corroding within the slab or the balcony edge. Steel expands as it corrodes and pushes the concrete off. This is remedial concrete repair work, not painting, and it needs to be done before any coating goes on. Coating over spalling simply hides progressive structural deterioration.

Failed or absent membranes

Water staining on the soffit, damp at the junction between the balcony floor and the wall, or deterioration around the drainage outlet all point at membrane performance. Investigation is warranted before scoping.

Ponding

A balcony that holds water rather than draining has a falls problem, a blocked outlet, or both. Water sitting on a surface finds every weakness in it. Clearing outlets is cheap. Correcting falls is not, but it is the fix.

Balustrade fixings

The point where a balustrade is fixed into the slab or the edge beam is where corrosion concentrates, because water gets into the penetration. This is a safety item, not a cosmetic one, and it should be inspected properly rather than viewed from a distance.

Metal balustrade condition

Steel balustrades corrode from the fixings and from any point where the coating has been breached. Aluminium fares better but suffers at contact points with dissimilar metals. Where a coating has failed and corrosion has taken hold, preparation is the majority of the work.

Coating selection actually matters here

Balconies present conditions the rest of the facade does not.

Horizontal and near-horizontal surfaces hold water rather than shedding it, which is harder on a coating than a vertical wall. Trafficable surfaces need to tolerate foot traffic, furniture and cleaning. Soffits are subject to moisture from above if the membrane above is compromised. Balustrades are metal, which needs different systems again to masonry.

The practical implication is that a single product specified across the whole building is usually the wrong answer for the balconies. Expect a proper scope to specify different systems for the soffits, the balcony walls, the trafficable surface if it is being treated, and the metalwork.

For metalwork, surface preparation is where the outcome is determined. Corrosion has to be removed back to sound material and treated. A high-quality topcoat over inadequately prepared steel fails at the corrosion, and it fails quickly.

The access and residents question

Balconies are attached to people's homes, which makes this work different to painting a facade from a swing stage.

Access to a balcony usually means access through the apartment, or from external access equipment positioned outside it. Either way, residents are affected directly. They lose the use of the balcony, they may need to clear furniture and plants, and there may be periods where doors cannot be opened.

That needs planning and communication rather than a notice on the lobby noticeboard the week before. In our experience the projects that go smoothly are the ones where residents were told, well in advance, which weeks affect their apartment, what they need to move, and who to contact when something does not work as described.

Balconies on apartment buildings are also where most residents keep plants, drying racks and outdoor furniture, and clearing them is a genuine imposition. Being upfront about it produces far better cooperation than discovering it on the day.

Where this sits in the building's funding

Balcony remediation is a different class of expenditure to a cosmetic repaint, and it should be treated as such in the owners corporation's planning.

Where investigation reveals membrane failure or concrete spalling, the cost profile changes substantially and the work may sit more naturally in the capital works fund or require a specific decision rather than being absorbed into a general maintenance repaint. Our earlier articles on paying for a repaint and getting a repaint approved at your AGM cover that ground, and the same principles apply with more force here because the numbers are larger and the consequences of deferral are structural rather than aesthetic.

The one thing worth saying plainly is that balcony problems do not improve with waiting. Water ingress and reinforcement corrosion are progressive, and the cost of addressing them rises over time.

Scoping it properly

A defensible scope starts with an inspection of a representative sample of balconies at close range, including the fixings. It separates remedial work from coating work. It specifies systems by substrate. It identifies which balconies need what, since condition often varies dramatically by orientation, with the weather-facing elevations well ahead of the sheltered ones. And it sets out access and resident impact.

Our balcony, balustrade and handrail coating work and remedial preparation are scoped that way, and where investigation is needed before a number can responsibly be given, we say so rather than pricing around it.

If your building has balconies showing their age anywhere across Melbourne, from the CBD and Southbank to Docklands, Richmond, Carlton, Brunswick, Footscray or Box Hill, we are happy to inspect and give the committee an honest picture of what is coating work and what is not.