FHN 
Monthly
For highly visible shops: a spotless window at all times, a polished image.
Offices · Shops · Buildings
Window cleaning for businesses and buildings
Interior and exterior windows, bay windows, glass façades, shop windows and conservatories: a streak-free finish, as a one-off or on a regular basis.
Overview
Who it’s for, and what you get
Clean windows instantly change how a building, a shop or an office looks. FHN Clean cleans interior and exterior windows for businesses, shops, buildings and co-owned properties in Mons, Hainaut, Wallonia and Brussels. We work on a one-off basis (before an event, to prepare a sale, after building work) or on a regular schedule (monthly, quarterly, every six months), depending on your needs.
Included services
- ✓ Interior glass: offices, glazed partitions, picture windows, dividers
- ✓ Exterior glass: accessible façades, ground-floor windows, terraces
- ✓ Shop windows: shopfront, side windows, interior mirrors
- ✓ Conservatories and glass roofs (access permitting)
- ✓ Frames: aluminium, uPVC, wood — wiped down with a damp cloth to finish the job
- ✓ Interior ledges and window sills
- ✓ Leftover plastic film (after installation or renovation)
- ✓ Traces of sealant, paint, labels: removed with the right technique
Quote within 24h
Save time: send us the floor area, the frequency you want and photos.
The quote form lets you upload images (current condition / access constraints), which speeds up the handling of your request.
📞 +32 65 22 92 44 · contact form
Typical clients
- • Offices and open-plan spaces with glass partitions
- • Shops and boutiques with a street-facing window
- • Restaurants, salons, beauty institutes, public reception areas
- • Car dealerships, showrooms
- • Office buildings and residential co-owned buildings
- • Medical practices and the liberal professions
The FHN Clean method
Analysis, planning, on-site work, quality follow-up
A structured method that delivers consistent, documented and repeatable results from one visit to the next.
1
Site visit
Total area, access, type of glazing, constraints (height, safety).
2
Choice of technique
The right method: professional squeegee, pure water, telescopic poles for height.
3
On-site work
Logical order top → bottom, treatment of marks, finishing of frames.
4
Checks
Checked from different angles and in different light to make sure there are no streaks.
5
Follow-up
For regular contracts: an annual schedule and a reminder before each visit.
6
Seasonal adjustment
More frequent in spring and autumn, less so in high summer or a mild winter.
Frequency
One-off or recurring, depending on your needs
Quarterly
For offices and office buildings: a balance between image and budget, the most common frequency.
One-off or every six months
Before an event, twice a year, or to complement existing cleaning.
Areas covered
Where we work
FHN Clean provides window cleaning in Mons and throughout Hainaut. We also cover Charleroi, La Louvière, Tournai and Brussels for regular contracts and larger one-off jobs.
FAQ
Frequently asked questions
Other services
Round out your specification
Communal areas
Entrance halls, stairwells, car parks, contracts for property managers (syndics).
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Method, and height
Why your windows streak again within three days
It is almost never the product. It is the method, the water and the order in which things are done. Here is what we do, and what you can check for yourself.
The four causes of streaks, in order
- Tap water. In Wallonia it is hard. As it dries, it leaves limescale on the glass — the streak is not dirt, it is mineral. That is why we use demineralised water whenever we can: it dries without leaving anything behind, and the glass does not even need to be wiped dry.
- Too much product. Detergent that is not removed turns into a greasy film that attracts dust. Less product, more water.
- The squeegee held wrongly. One continuous stroke, slightly angled, overlapping the previous one, and the blade is wiped after every stroke. A dirty blade puts back what it has just removed.
- Full sun. The glass dries before the squeegee is finished. We always start early, with the façade that faces the sun.
Frames and seals make up half the result
A spotless pane in a grimy frame still looks dirty. Water held in the rebate runs down at the first shower and streaks the glass from top to bottom. We vacuum the rebate and clean the seal before touching the glass — and that is why a serious quote is not the same price as a quick run with a squeegee.
Height: what decides the price, and whether it can be done
That is the real question, and the one most quotes gloss over.
- Up to three storeys: water-fed telescopic pole with demineralised water, from the ground. No scaffolding, nothing blocked off.
- Higher, or overhanging: cherry picker. On our 126-home contract in Mons, it was a 17-metre cherry picker, priced as an option, by the day, and only invoiced if it was used.
- What costs money is not the glass, it is the access: a cherry picker is hired by the day, it needs somewhere to stand, sometimes a council permit to occupy the road, and a certified operator.
A window-cleaning quote that says nothing about height or access is a quote whose price will change on site. Ask for it to be in writing.
How many times a year?
What decides is not appearance, it is exposure:
- Shop window on a busy street — every week or every fortnight. It is your shopfront.
- Offices — four times a year is enough for the outside, twice for the inside.
- Stairwell in a block — twice a year, and it is the item most often forgotten in communal-area contracts. It is also the first thing raised at the general meeting.
- Building by a road or near a building site — double it. Brake dust and cutting dust stick to glass.
After building work, it is a different job
Glass on a building site carries splashes of paint, plaster and silicone, and sometimes a protective film baked on by the sun. It is scraped off with a blade, held flat, on wet glass — never dry, never with solvent on a uPVC frame. It is a separate item, and it appears in our post-construction cleaning quotes under its own heading.
The guide
Professional window cleaning: what makes the difference
A badly cleaned window does not show straight away — it shows at the first low ray of sunlight. Here is what separates a clean that lasts from one that leaves a haze.
Purified water, and why it changes everything
Tap water contains minerals — mostly limescale. As it dries, they stay on the glass: those are the white marks and the haze. Purified water is water from which these minerals have been removed by reverse osmosis. It dries without leaving anything behind, which means we can clean without wiping, using a brush and pole.
In practical terms: from the ground, we can reach windows that used to need a cherry picker or a ladder, up to a height of about three storeys. It is safer, faster, and there is no machine taking up your car park.
The glass is only part of the job
A quote that only mentions the glass is incomplete. What should be in it:
Frames
Fixed frames, opening casements, rebates. That is where dust and insects build up; a clean pane in a black frame achieves nothing.
Both sides
Inside and outside, or outside only? The price difference is real, and so is the difference in result.
Sills and ledges
Window sills, patio-door thresholds, glass balustrades. Often left out of the quote, always in plain sight.
How often
| Situation | Frequency | Why |
|---|---|---|
| Shop window | 1× / week to 1× / fortnight | Handprints, rain, splashes from the street |
| Offices, sheltered façade | 2 to 4× / year | Slow build-up, mainly pollen |
| Building by a road | 4 to 6× / year | Traffic dust, greasy film |
| Conservatory, glass roof | 2× / year | Moss and plant debris in spring and autumn |
| After building work | One-off job | Cement, silicone, labels: this is scraping, not washing |
The right time: not in full sun. On warm glass, the water dries before it is removed and leaves streaks whatever you do. We schedule large façades early in the morning or on overcast days — not as a preference, but because the result depends on it.
What we look at before pricing
- Height and access. Up to three storeys, a pole is enough. Above that, a cherry picker or rope access technicians are needed — and it is no longer the same job or the same price.
- What is below the windows. A hedge, a bank, a cluttered terrace: the pole needs room to step back.
- The starting condition. A façade that has not been cleaned for five years needs a more thorough first visit. Only then does maintenance become regular and predictable.
Take the first step
Need a quote for window cleaning?
Describe what you need in a few lines. We’ll reply within 24 working hours with a clear proposal.