The most common complaint we hear about window cleaning on the Northern Beaches is that the windows were cleaned and still look cloudy.
Usually the cleaner did nothing wrong. Coastal glass has a problem that ordinary window cleaning is not designed to solve.
Three different things on the glass
Ordinary soiling. Dust, pollen, rain marks, sea spray residue. Comes off with detergent and a squeegee. This is what a standard clean is priced for.
Bonded salt film. Airborne salt lands on glass, absorbs moisture from the air, and over repeated wetting and drying cycles forms a layer that is chemically attached rather than loose. Detergent does not lift it. The window comes up clean and still reads hazy in raking light.
Mineral etching. The end state. Where deposits have been left long enough, particularly in combination with hard water from sprinklers, the glass surface itself is pitted. This is not a coating and nothing removes it — the glass has been altered.
The full distinction is in salt film vs hard water staining, and it is the single most useful thing to understand before paying anyone.
Which suburbs get it worst
Anywhere with a direct line to the surf and no shelter. Collaroy and Narrabeen on the beachfront, Queenscliff and Freshwater, the ocean side of Newport and Avalon, Whale Beach, and the exposed ridges above them.
Pittwater-facing properties get a milder version — still salt, less of it, and the lack of wind-driven surf spray makes a real difference.
Properties a few streets back are substantially better off than front-line ones, and the gradient is steeper than people expect. Two hundred metres matters.
The counterintuitive part
Salt damage is worst where rain does not reach.
A fully exposed window gets washed by every shower. A window under a wide eave, on a balcony, or in the lee of a wall accumulates salt and never gets rinsed. So the hazy windows are often the sheltered ones, not the ones facing the weather.
Same principle applies to the frames and the window tracks, where salt and sand collect and corrode the aluminium from inside the channel.
What a proper coastal clean involves
More than a squeegee and a bucket.
A specialist cleaner formulated to break down bonded mineral deposits, with dwell time, rather than general glass cleaner.
Deionised water for the final rinse. Tap water in Sydney carries enough dissolved mineral to dry with a film, which undoes the work. Pure water dries spot-free with no squeegee marks.
Frames, tracks and sills included, because salt sitting in the track migrates back onto the glass and corrodes the frame.
Flyscreens out and cleaned — mesh is enormous surface area for salt and it shades the room more than people realise. See how to clean flyscreens.
An honest assessment. If glass is etched, saying so rather than cleaning it a third time.
Restoration, where it is possible
Lightly etched glass can sometimes be polished with cerium oxide. It is slow, specialist work and it is priced accordingly, but on a large picture window with a view it costs far less than replacement.
Heavily etched glass is replacement. There is no product that restores it, and anyone claiming otherwise is selling you repeat cleans.
Worth knowing before you buy a beachfront property with original glazing.
Prevention is the actual answer
This is where the money is on the Northern Beaches.
Regular fresh-water rinsing prevents the bonded layer forming in the first place. A hose over the windows every few weeks, particularly after a big southerly, costs nothing and is more effective than any clean afterwards.
Frequency matters more than thoroughness here. Three light cleans a year beats one heavy one, because you are removing salt before it bonds rather than fighting it after.
For front-line properties, quarterly is reasonable. A few streets back, two or three times a year.
Pricing
Standard Sydney rates are in what window cleaning costs in Sydney. Expect coastal restoration work to be quoted separately from routine cleaning — they are different jobs and an operator who prices them the same has not understood the problem.
The equivalent issue on the eastern beaches is covered in salt-hazed windows in Coogee and Maroubra, and the wider coastal picture in salt, sun and sea air.
For a quote, see window cleaning.
