Many low-to-mid access commercial windows can be handled with a water-fed pole system, which is why these have become standard. Beyond that reach, the work moves into specialist territory with its own licensing, training and planning requirements.

At what point does the job stop being an in-house task?



Internal glass and accessible ground-floor exterior glass are reasonable for trained in-house staff with the right kit. Anything requiring ladders above a low working height, roof anchor points, rope access or elevated work platforms is specialist work. That transition point comes earlier than most people expect, and getting it wrong carries consequences well beyond a poor finish.

Working at height needs planning, not just equipment

Buying a longer pole does not make a job safe. The access method should be decided before any equipment is selected.

Practical points for commercial sites:

• Ladders are the highest-risk option, and are generally treated as a last resort for short-duration, low-height tasks rather than a standard method
• Water-fed poles remove most height risk by keeping the operator on the ground, which is the main reason they dominate commercial exterior work
• Pole length has practical limits. Longer poles become heavy and unstable, and control over brush pressure drops as reach increases
• Overhead powerlines are a serious hazard with carbon fibre and aluminium poles, and clearance distances must be checked before work starts
• Wet ground and pedestrian traffic need managing with signage and, where relevant, exclusion zones
• Elevated work platforms may require licensed operators, depending on the equipment, height and local requirements, along with appropriate site planning
• Rope access and anchor-based work requires certified operators and inspected, compliant anchor systems

For most businesses, the practical answer is straightforward: handle internal and low-level glass in-house if you want to, and engage professional window cleaning for anything requiring height access.

Streak-free results come from technique and condition, not the tool

The most common assumption in window cleaning is that better equipment produces better results. In practice, the finish depends on five factors that have little to do with what the tools cost.

Water quality. Mineral content is the main cause of spotting on exterior glass. Purified water dries clean, mains water does not. This is why pure water systems exist, and why a TDS meter is a genuine diagnostic tool rather than an accessory.

Rubber condition. Covered above, and it is one of the most common causes of lines on otherwise well-cleaned glass.

Detergent quantity. More is not better. Excess detergent leaves surfactant residue that streaks as it dries. A small amount in a full bucket is the standard approach.

Cloth choice and laundering. Cloths washed with fabric softener will smear. Cloths that shed will leave lint on the glass. Window cloths should be laundered separately, without softener, and kept away from cloths used with other cleaning products.

Technique and sequence. Consistent overlapping passes, wiping the blade between passes, and detailing edges last. Working in direct sun causes solution to dry before it can be removed, which is why exterior work is often scheduled early or on overcast days.

Glass condition also has a ceiling. Hard water etching, mineral scale bonded to the surface and scratched glass will not clean up to a like-new finish regardless of method. Setting that expectation before a job starts avoids disappointment afterwards.

How often does equipment need replacing?

Rubber is consumable and replaced frequently. Scrubber sleeves and microfibre cloths are laundered until they lose effectiveness, then replaced. Scraper blades are single-use per job at most, since a blunt or chipped blade scratches glass. Poles, handles and filtration housings last for years with reasonable care, though filtration media in a pure water system is replaced on a schedule based on output readings rather than time.

Building the kit for a commercial site

Start with what the site actually has: the glass types, the heights, the access points and how often it needs cleaning. That determines the equipment, not the other way around.

A site with mostly internal partitions and a shopfront needs a modest kit that in-house staff can manage. A multi-storey building with atrium glass needs an access plan first and equipment second, and that plan usually points toward a contractor with the training, licensing and insurance for height work.

Where equipment is being purchased, spend on the parts that touch the glass and the water that dries on it. A mid-range handle with fresh rubber and properly filtered water will outperform an expensive kit running tired blades and mains water every time.

Frequently asked questions

What equipment do professional window cleaners use?

A standard professional kit includes a squeegee with interchangeable channels and fresh rubber, a T-bar scrubber with washable sleeves, a bucket and glass-safe detergent, microfibre or scrim cloths, a scraper with fresh blades, and extension poles. For exterior work above ground level, a water-fed pole connected to a pure water filtration system is the common approach.

What is a water-fed pole and why is it used?

A water-fed pole delivers purified water through a brush head on a telescopic pole, letting an operator clean exterior glass from the ground. Because purified water contains no dissolved minerals, the glass dries without spotting and needs no squeegee pass. It is used mainly because it removes the height risk associated with ladders on commercial buildings.

Why do windows still streak after cleaning?

The usual causes are worn or nicked squeegee rubber, too much detergent, mains water drying on exterior glass, cloths washed with fabric softener, or working in direct sun so the solution dries before removal. Equipment quality is rarely the problem. Checking rubber condition and reducing detergent solves most streaking issues.

Can a business clean its own commercial windows?

Internal glass and accessible ground-level exterior glass can reasonably be handled in-house with the right equipment and training. Anything requiring ladders at height, elevated work platforms, rope access or roof anchor points falls under work at height obligations and should be handled by trained, licensed operators with appropriate insurance.

Is a pure water system necessary for commercial window cleaning?

For exterior glass, it makes a substantial difference, since mains water leaves mineral spotting as it dries. For internal glass cleaned with a squeegee and detailed with cloths, it is not required. Whether the investment makes sense depends on how much exterior glass is being cleaned and how often.

Matching the kit to the building

Commercial window cleaning equipment is less about accumulating tools and more about selecting the right ones for the glass, the height and the frequency involved. A short, well-maintained kit consistently produces a better finish than an extensive one in poor condition.

Before purchasing, work out the access method for every window on the site. That single exercise tends to answer most equipment questions, and it flags early where the work needs specialist training rather than a bigger kit.



Everyday Clean is a Sydney-based commercial and residential cleaning provider working across offices, retail sites, strata properties and other commercial buildings.