Render Repairs and Remedial Prep Before a Strata Repaint

The most expensive mistake an owners corporation can make is treating a facade repaint as a painting job. On most Melbourne apartment buildings the coating is a minor part of the cost and almost none of the risk. The remedial work underneath is where both sit.

Why this matters more than the paint specification

Committees spend considerable energy comparing paint brands and coating systems. It is the wrong place to focus. Any reputable coating applied over a sound, properly prepared substrate will perform. The same coating applied over drummy render, unrepaired cracking or an active water ingress path will fail regardless of what it cost.

When a facade repaint fails early, and we are asked to look at buildings where it has, the cause is almost never the paint. It is that the preparation scope was cut to make a number work.

What remedial prep actually involves

Start with a proper condition assessment. Someone has to physically access the facade, not assess it from the ground or from photographs, and sound the render to find delamination. Drummy render sounds hollow when tapped, and it means the render has lost bond with the substrate behind. Coating over it guarantees failure, because the coating comes away with the render.

Cracking has to be classified rather than simply filled. Fine crazing across a rendered surface is cosmetic and can be handled with an appropriate flexible coating. Cracks that follow a line, step diagonally from window and door corners, or track along slab edges are movement or structural indicators and need diagnosis. Filling those without understanding them hides a problem that will reappear within a season or two.

Then the water paths. On multi-storey buildings the recurring sources are failed or absent sealant at control joints, perished sealant around window and door perimeters, inadequate or damaged flashings, balcony junctions and drainage, and parapet and roof edge details. These are the details that let water behind the facade, and no coating applied to the outside face will stop water that is entering from above or behind.

Balcony soffits, undersides and edges deserve particular attention because they are where concrete spalling shows first. Where reinforcement has corroded and is pushing concrete off, that is a remediation job with its own methodology, and it must be resolved before painting rather than skimmed over.

The scope items owners corporations most often miss

Sealant replacement is the big one. Sealant has a finite life, typically well short of the repaint cycle, and replacing it is unglamorous, meaningful work. A repaint that puts new coating over twenty-year-old perished sealant has locked in the next problem.

Substrate drying time is another. Newly applied render and repair mortars need to cure before coating, and they need a primer suited to a high-alkalinity surface. Programs that do not allow for this produce patchy colour and premature failure.

Access is a third. On anything above a couple of storeys, access equipment is a substantial part of the cost, whether that is swing stage, rope access or scaffold. That cost is largely fixed regardless of how much repair work is done while you are up there, which is the strongest argument for doing the remedial work thoroughly now rather than returning later.

Why this makes quotes hard to compare

This is the practical problem for a committee. Three quotes arrive, one is materially cheaper, and it is not obvious why.

Usually it is because the cheaper quote has assumed minimal remedial work, or has priced repairs as a provisional sum that will be adjusted once work starts. That is not necessarily dishonest, since nobody can know the full extent of delamination until they are on the facade. But it means you are not comparing like with like.

The way to fix this is to define the remedial scope yourself before going to market. Commission an independent condition report, have it specify the extent of render repair, crack treatment, sealant replacement and any concrete remediation, and issue that specification to every tenderer. Then the quotes are comparing the same work and the differences are real.

Where extent genuinely cannot be known in advance, insist on a schedule of rates for the unknown items, so that additional repair work is priced at an agreed rate rather than negotiated under pressure mid-project.

Funding and sequencing

Remedial work shifts a repaint from a maintenance item toward a capital works item, and that affects how it should be funded and how it is presented to owners. It is worth resolving the funding approach and the approval path early, because a scope that has to be cut late to fit a budget is precisely how the preparation gets stripped out.

It also affects duration. Buildings are occupied throughout, and remedial work is noisier, dustier and longer than painting. Residents need realistic notice of what is happening and when, and access to balconies will be restricted for periods.

The test to apply

Ask each contractor a simple question: what did you find when you sounded the render, and what are you proposing to do about it. A contractor who has physically assessed the facade will answer specifically. One who has not will answer generally. That single question separates the quotes faster than any amount of comparing coating datasheets.

If your owners corporation is planning a facade repaint anywhere across Melbourne, Docklands, Southbank, Richmond, Carlton, Brunswick, Footscray or Box Hill and wants the remedial scope assessed properly first, get in touch.