Waterproofing Sydney

Most Sydney water damage enters through a handful of predictable details. Balconies leak at the wall-to-floor junction, at door thresholds and around balustrade fixings, where the original membrane was terminated short or has simply reached the end of its life. Parapet walls let water in through cracked capping and open mortar joints, then feed it down inside the wall cavity.

Planter boxes built against walls are the quiet offender: soil holds moisture against the structure permanently, and an unlined or failed planter wicks it straight into the adjoining room. Porous and cracked render is the broadest entry point of all. When an east-coast low drives rain horizontally, unsealed render absorbs it across the entire face of the wall, and hairline cracks turn into supply lines.

Buildings signal water entry long before a ceiling drips. Render sounds drummy, a hollow note when tapped, where moisture has broken the bond behind it. Paint bubbles and blisters as water pushes it off the wall from behind. Efflorescence, the white powdery salt on brick and render, is left behind by water travelling through the masonry and evaporating at the surface.

Below balconies, look for tide marks, drip stains and rust tracking from balustrade fixings. Inside, a musty smell against an external wall means the moisture has already made it through. Every one of these is a waterproofing problem wearing a paint problem's clothes, and repainting over any of them fails within a season, because the water is still moving.

Apartment buildings concentrate every waterproofing risk on this page: rows of identical balconies ageing at the same rate, planter boxes in common landscaping, and parapets and facade render reaching the end of their service life together. When 1 balcony leaks into the unit below, its neighbours are rarely far behind.

For owners corporations we scope this work the way committees need it: a building-wide inspection, a clear list of which balconies and details need membrane work now and which can wait, and pricing structured so the works stage across budgets. Membrane coatings sit naturally inside a facade repaint, and doing both together saves the cost of accessing the same elevations twice. Our strata painting service covers the painting side of those programs.