Balcony Waterproofing in Mascot

A failed balcony membrane does not announce itself in a thunderstorm. It announces itself after several days of steady rain, and Mascot has a rain gauge inside its own boundary to show when that arrives — the Bureau of Meteorology's Sydney Airport station, number 066037, recording since 1929. Its long-run averages peak in March and again in June and fall to their lowest in September, which is why a balcony that looks sound in a dry September can be leaking badly by autumn.

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Balcony Waterproofing around Mascot

Mascot is 74.3 per cent flats — 6,026 apartments out of 8,085 dwellings. The station's long-run averages show the same shape as the city as a whole: rainfall peaks in March at 122.9 mm and again in June at 124.1 mm, and falls to 60.4 mm in September. June is roughly double September.

That is not trivia. Enquiries here follow the rainfall curve rather than the calendar, which matters if you are deciding when to have a balcony looked at — the dry months are the ones least likely to show you anything, and a membrane can be well past the end of its life without producing a single visible sign in them.

The underside of a rendered apartment balcony seen from directly below, dark aluminium balustrades and planted slab-edge planters stepping up against a clear sky — balcony waterproofing, Sydney. Illustrative example.

Permits and Bayside Council rules

Bayside Council is the council for Mascot, and its current requirements should be confirmed directly with it. At state level the Design and Building Practitioners Act 2020 names waterproofing as a building element and treats repair of a prescribed building as building work, with class 2 apartment buildings prescribed. At 74.3 per cent flats, the majority of Mascot balconies sit on the kind of building that regime was written for.

Source: Design and Building Practitioners Act 2020 (NSW) s 6(1)(b), s 4(1)(c); Bureau of Meteorology station 066037 (Sydney Airport) for the rainfall figures above. Dwelling figures: Australian Bureau of Statistics, Census of Population and Housing 2021, Mascot (SAL 12529), CC BY 4.0. — confirm current requirements with Bayside Council.

Timing and lead times in Mascot

The rainfall figures above are measured inside this suburb rather than nearby: the Bureau's surveyed coordinates for the Sydney Airport station fall inside Mascot's boundary. The March and June peaks and the September trough are the local record from the station in this suburb, not a city-wide estimate, and they are the months in which a failing balcony membrane makes itself known.

Our Mascot service area

We take balcony waterproofing enquiries across Mascot and the surrounding Bayside area.

See all Balcony Waterproofing in Sydney. We also work in Mascot and Kogarah both sit within Bayside Council, though Kogarah is split with a second council to its south..