Window Cleaning in Melbourne: Pure-Water Cleaning Explained

Professional windows stay streak-free because of how the water is treated, not how hard the glass is scrubbed. We clean with pure water, also called deionised water, which has had every mineral and impurity stripped out. Tap water leaves spots because it carries dissolved salts and minerals that stay behind as it dries. Pure water has nothing left to leave behind. It clings to the dirt, lifts it off the glass, and rinses clean. Because there is no detergent and no mineral residue, the glass dries spotless on its own, with no towelling and no smears.

For Melbourne homes and businesses, this method has quietly become the standard for safe, consistent results, especially on upper-storey glass. Below we explain how it works, what’s included in a proper window clean, and how often different properties need it.

What is pure-water window cleaning?

Pure-water cleaning uses water that has been filtered and deionised until it holds almost no dissolved solids. In its natural state, water is a magnet for minerals. Strip those out and you create water that is desperate to grab anything it touches, including the dirt on your windows.

The water is pumped through a soft brush that agitates the glass and frames, then rinsed off with the same pure water. As it evaporates, it leaves nothing behind. No soap film, no hard-water spots, no streaks. The glass simply dries clear.

This is the key difference from the old bucket-and-squeegee approach. Traditional cleaning relies on detergent and a skilled squeegee stroke to drag the dirty, soapy water off before it dries. Any soap left in a corner becomes a streak. Pure water removes that risk entirely because there is no chemical residue to manage.

Why doesn’t it streak?

Streaks come from two sources: detergent residue and dissolved minerals. Pure-water cleaning eliminates both. There’s no soap involved, and the water itself has been stripped of the minerals that cause spotting. When the glass dries, there is simply nothing left on the surface to catch the light. That’s the whole trick.

How does the water-fed pole system reach upper-storey windows?

A water-fed pole carries pure water from a tank up a long, lightweight pole to a brush head at the top. The operator stays on the ground and controls the brush from below, cleaning windows two, three, even four storeys up without a ladder ever touching the building.

This matters more than most people realise. Working at height is the single biggest safety risk in this trade, and ladders are involved in a large share of serious falls on Australian worksites. Cleaning from the ground removes that risk almost entirely. It also protects your gutters, roof tiles, and garden beds, which all take a beating when ladders are leaned and repositioned around a property.

The reach of the pole is what makes the method so well suited to Melbourne housing. Many homes here are double-storey with awkward rooflines, narrow side access, and second-floor windows that sit above paving or garden beds where a ladder can’t safely stand.

• No ladders against the building means no scratched render, no damaged guttering, and no risk of a fall.
• Ground-level control lets the operator clean awkward gables and high feature windows that ladders can’t safely reach.
• Soft bristle brushes agitate the glass and the frame at the same time, so dirt is lifted rather than smeared.
• Consistent rinsing from the same pure-water supply ensures the top and bottom of tall windows dry the same way.

In our experience, the water-fed pole is the difference between a window clean that looks good for a week and one that holds up far longer, because the frames are cleaned too, so less grime washes back down onto the glass in the next rain.

What does interior versus exterior window cleaning include?

Exterior cleaning covers the outside glass, frames, and sills, and this is where pure water and the water-fed pole do their best work. Interior cleaning is a separate task handled by hand, since pure-water poles are an outdoor system. A complete window clean usually addresses both faces of the glass plus the parts most people forget.

The glass is only half the job. Frames, sills, and tracks collect dust, cobwebs, dead insects, and grime that will streak straight back onto clean glass the moment it rains if left untouched. A thorough clean deals with all of it.

Exterior cleaning

Outside, we clean the glass, the frames, and the sills using the water-fed pole. The brush agitates built-up grime on the frames, and the pure-water rinse carries it away. Because the operator works from the ground, even high and hard-to-reach windows get the same treatment as the ones at eye level.

Interior cleaning

Inside, the glass is cleaned by hand, with care taken around furnishings, blinds, and floors. Interior glass usually needs attention less often than exterior glass, since it isn’t exposed to rain, dust, and pollution. Many clients book interiors seasonally and exteriors more frequently.

Sills and tracks

Sliding door and window tracks trap dirt, grit, and moisture that can stiffen the runners and, over time, encourage mould. Clearing the tracks keeps doors gliding and removes a hidden source of grime that otherwise migrates onto the glass.

Why does mould appear on north-facing windows in winter?

Mould forms where moisture lingers and sunlight is scarce, and in Melbourne’s cooler months that often means the shaded, damp side of the house. In the Southern Hemisphere, south-facing windows get the least direct sun, so they stay cooler and damper through winter, which is exactly what mould needs to take hold.

Condensation is the driver. When warm, moist indoor air meets cold glass, water beads on the surface and in the frame corners. On a shaded window that rarely dries out fully, that persistent moisture lets mould colonise the seals, the frame edges, and the corners of the glass. You’ll often see it first as black or grey speckling along the rubber seals.

Pressure alone won’t fix it. Mould has to be treated, not just rinsed. We apply an appropriate treatment to kill the spores, then clean the affected glass, frames, and seals so the surface is genuinely clear rather than smeared. Improving airflow and wiping condensation through winter slows it coming back, but on chronically shaded windows, a periodic professional clean is usually the realistic answer.

For a broader look at how shade and damp affect the whole building envelope, see our guide to exterior house cleaning in Melbourne.

How often should windows be cleaned?

Most Melbourne homes do well with a clean two to four times a year, while shopfronts and offices often need monthly or fortnightly service to keep up appearances. The right frequency depends on your environment, how visible the glass is, and how quickly your particular property shows dirt.

A home set back from traffic in a leafy street will hold up far longer than one on a busy road or near the bay, where salt spray and road grime build quickly. Here’s a rough guide based on what we see across the city.

• Suburban homes: two to four times a year keeps glass consistently clear and stops grime baking on.
• Homes near main roads or the coast: more often, as traffic film and salt accumulate faster.
• Shopfronts and retail: fortnightly to monthly, since clean glass is part of the storefront and first impressions matter.
• Offices and commercial buildings: monthly to quarterly, depending on foot traffic and how the building presents.

One pattern we notice: properties cleaned on a regular schedule are far easier and faster to maintain than those left for a year or more, because grime hasn’t had time to bond to the glass and frames. Regular cleaning is genuinely the cheaper habit over time.

Do you need to be home for window cleaning?

No, you don’t need to be home for exterior cleaning. The water-fed pole system works entirely from outside and ground level, so as long as we have access to the property and an outdoor tap or our own water supply, the exterior can be done without anyone present. Many clients are at work when we visit.

Interior cleaning is the exception, since that requires access inside the home or building. For interiors, we arrange a time that suits you. If you’re booking both, it’s simplest to be home for the interior portion and let us handle the exterior either before or after.

What affects a window cleaning job?

The main factors are the number of windows, their height, and how easy they are to access. A single-storey home with clear, open frontage is a quick, straightforward job. Add a second storey, tight side access, heavy frames, or mould treatment, and the work grows accordingly.

Knowing what drives the job helps you understand any quote you receive. The biggest variables are below.

• Number of windows: more panes, frames, and tracks simply mean more surface to clean.
• Height and storeys: upper-storey glass takes longer and needs the water-fed pole setup.
• Access: narrow side passages, locked gates, fixed screens, and obstructions all add time.
• Condition: windows neglected for a long time, or affected by mould, need extra treatment.
• Interior versus exterior: a full inside-and-out clean is more involved than exterior only.

If your home also has solar panels up top, it’s often efficient to combine the visit, since we’re already working at height with the right gear. See our guide to solar panel cleaning in Melbourne for how that works.

Book your window clean

Streak-free, ladder-free, and done properly down to the frames and sills. If you’d like clear windows that stay that way, you can request a booking online or call us on (03) 5905 9000. We’ll talk through your property, your access, and whether you want interior, exterior, or both, then sort out a time that suits you.