Pure-Water Window Cleaning Explained: Why Reach-and-Wash Beats Squeegees in 2026

Traditional window cleaning uses a bucket, a squeegee and a ladder. Modern professional window cleaning uses a 4-stage water purification system, a 12-metre carbon-fibre pole, and a soft-bristle brush head that works from the ground. The result: streak-free glass, no chemistry residue on frames, no ladders against your sash windows. Here's why it's the standard in London 2026.

How pure-water cleaning works

Mains water is processed through a sediment filter, a carbon filter, a reverse-osmosis membrane and finally a deioniser. The result is water with zero dissolved solids — TDS reading below 0.005 ppm. That water is hungry: it actively pulls dirt off the glass and dries with no residue, no spots, no streaks. The brush head agitates the surface; the rinse lifts everything clear; the glass dries in 5–10 minutes leaving zero marks.

Why it beats squeegees

• No detergent residue on frames or sills (squeegee suds run down and discolour wood)
• Reaches up to 4 storeys from the pavement — no ladders, no scaffolding
• Cleans frames and seals at the same time as the glass
• Works in light rain (rainwater is impure — it streaks; pure water is fine)
• No scratching from grit picked up in a squeegee blade
• Faster: a 4-bed semi's external glass cleans in 35–45 minutes vs 90 with ladders

Best for which property type

• Period homes with original sash windows: pure-water is mandatory — squeegees damage soft putty
• Townhouses (3-storey): only ground-based system can reach top floor safely
• Conservatories: pure-water cleans the roof glass without ladder pressure on the rafters
• Commercial premises: faster, cheaper, no scaffold requirements
• Listed buildings: ladder-free is often a requirement of the listing

How often should London windows be cleaned?

Externally: every 4–6 weeks for residential, every 2–3 weeks for ground-floor commercial. London air carries diesel particulate, brake dust and pollen — all of which adhere to glass within days. Internally: every 3–6 months for residential, monthly for offices. We offer regular plans with 10% off for monthly customers and 20% off for fortnightly.

What we charge in TW and SW postcodes

Standard 3-bed semi external windows: £35–£50. 4-bed detached: £50–£70. Townhouse with 3 storeys and Juliet balconies: £55–£85. Conservatory roof add-on: £25–£45. Inside-and-out package: 60% premium on the external rate. Add solar-panel cleaning for £40–£70 on a domestic array. All fixed prices, no hourly. Photo proof sent on request.