A glass facade is the first thing a customer, guest or partner sees. In the Tunisian climate, dust, sand and sea salt build up quickly, and buildings lose their natural light and appearance. This guide explains the methods for cleaning glass facades and shopfronts, the right frequency for each type of building, and what determines the price of a cleaning quote.
Why is facade cleaning an investment rather than an expense?
Dirty glass does not only affect appearance. The layer of dust and salt reduces natural light, increases lighting consumption and hides early defects in seals and frames that could be treated before they get worse.
On the coast, wind loaded with salt and sand leaves marks that turn over time into stains that ordinary washing cannot remove and that require deeper, more expensive cleaning.
Commercial image — A clean facade signals a hotel, shop or headquarters that is looked after.
Natural light — Clean glass means better light in offices and shops and lower electricity use.
Protecting glass and frames — Regular cleaning prevents permanent stains and reveals damaged seals early.
Methods for cleaning glass facades
The method depends on the building height, facade shape and access options. The three most common methods:
Rope access
Qualified technicians descend from the roof on certified ropes. No scaffolding, no crane, no blocked road or entrance. The most suitable method for towers, hotels and buildings with large facades.
Crane or scaffolding
Necessary for some buildings with no anchor points on the roof, but requires hiring, transporting and assembling equipment and occupying ground space.
Telescopic pole with pure water
Suitable for lower floors, shopfronts and commercial facades: purified water dries without marks and needs no wiping.
Glass facade cleaning by rope access — TravailEnHauteur
By building type
Each type of building has its own cleaning constraints:
Hotels and resorts
Interventions at times that do not disturb guests, usually before and during the season, with discretion.
Towers and offices
Full glass facades (curtain walls) requiring rope access from the roof and floor-by-floor organisation.
Shops and shopping centres
Shopfronts, display windows and atriums: frequent cleaning with streak-free tools, outside peak hours.
Clinics and hospitals
Compliance with hygiene standards and suitable products.
Factories and warehouses
Roof glazing and industrial facades exposed to dust and smoke, often in hard-to-reach areas.
Banks and headquarters
Head offices and branches whose facade is part of their corporate identity.
What is the right frequency?
There is no single frequency for every building. The deciding factors are location (coastal or inland), type of activity, and the facade's exposure to wind and dust:
Shopfronts and display windows — The most exposed to fingerprints, rain and street-level dust; they need frequent cleaning.
Coastal hotels — Cleaning before the tourist season, then follow-up during it because of sea salt.
Towers and offices — A recurring contract (quarterly or half-yearly) spreads fixed costs and prevents build-up.
Industrial buildings — Depending on surrounding dust and smoke, often combined with maintenance interventions.
What determines the price of glass facade cleaning?
No serious provider can quote without seeing the building, or at least photos and a facade plan. Six factors determine the quote:
Actual glass surface — The glass is billed, not the facade: a full curtain wall and a building with ordinary windows have very different areas.
Height and number of floors — Height extends set-up and movement time between zones, but the price does not rise linearly.
Possible access method — Ropes from the roof, crane, scaffolding or telescopic pole: each has a radically different mobilisation cost.
Level of soiling — Regularly cleaned glass is washed with pure water; glass neglected for years or stained with cement needs deep cleaning.
Frequency — A single intervention carries all fixed costs alone; a recurring contract spreads them and shortens each visit.
Site constraints — Work at set hours, industrial sites requiring permits, nearby power lines, protecting passers-by below the facade.
Billing methods
Per square metre of glass: suited to large, uniform facades.
Per team-day: suited to varied interventions or those hard to measure.
Fixed price for a defined project: suited to recurring contracts and already-known buildings.
Frequently Asked Questions
It depends on location and activity: shopfronts and display windows need frequent cleaning, coastal hotels need cleaning before the season and follow-up during it because of salt, and towers and offices need a quarterly or half-yearly recurring contract.
Yes, when carried out by qualified technicians with certified equipment, verified anchor points and rescue procedures. It is the reference technique for cleaning towers and hotels because it needs no scaffolding and does not block the building entrance.
According to the actual glass surface, height, possible access method, level of soiling, frequency and site constraints. It is billed per square metre, per team-day or as a fixed price.
Yes. Shopfronts, shopping centres and atriums are part of our glass cleaning services, alongside towers, hotels, offices and clinics throughout Tunisia.