FRENNL
Professional window cleaning

Professional window cleaning.

Interior and exterior windows, glass facades, glass roofs. A sharp, streak-free finish for your offices and shops.

Free quote within 6 hours
What’s included

A sharp finish, every time.

Streak-freeTechniques and products matched to the job for a sharp, lasting result.
VCA-certified techniciansSafe working on any type of site.
Flexible hoursBefore or after your opening hours.
Quote within 6 hoursFree, no-obligation estimate.
By type of glazing

Every type of glass has its own frequency and technique.

A shop window isn’t cleaned like a glass facade at height. A good result starts with a good assessment, not a one-size-fits-all method.

Type of glazingRecommended frequencyMethod used
Shop window (ground floor)Weekly to fortnightlySqueegee, degreasing product, streak-free drying
Interior office windowsWeeklyDegreasing, fingerprints, glass partitions
Glass facade at heightQuarterlyTelescopic pole and purified water, in most cases without an aerial platform
Glass roofs & skylightsTwice a yearSafe access, technique matched to the slope
How we work

No streaks, no limescale, no risk.

01Access assessmentHeight, hard-to-reach spots, type of glass. We choose the right technique before we start.
02Purified water for heightTelescopic pole and pure water. No limescale marks, and in most cases no aerial platform needed.
03Squeegee for the restShop windows and interior windows. Classic technique, dries instantly, sharp finish.
Guide prices

A ballpark figure before your detailed quote.

Type of jobTypical useGuide price
Shop window or accessible windowsGround floor, interior€3 to €6 per m²
Windows at heightTelescopic pole, purified water€5 to €9 per m²
On-site assessmentBefore any quoteFree, included
These figures are indicative and reflect typical prices on the Belgian market. The exact price depends on the glass area, height, access and the frequency you want. A free on-site assessment lets us give you an accurate quote.
Available everywhere

Across Wallonia, Brussels, Flanders and Luxembourg.

Namur Brussels & Walloon Brabant Liège Charleroi & Hainaut Luxembourg
Frequently asked questions

Before you call us.

Do you also clean shop windows?+
Yes, we clean shop windows as well as office windows and glass facades.
How often should business windows be cleaned?+
It depends on exposure and location. We’ll recommend a suitable frequency in your quote, with no minimum contract.
How do you clean windows at height without an aerial platform?+
With a telescopic pole and purified water. This lets us reach several floors without scaffolding or an aerial platform, and without limescale marks.
Do you use chemical products?+
As little as possible. Purified water is enough for most windows at height. For very dirty shop windows we use a suitable degreaser that’s gentle on surfaces.
Does the cleaning leave limescale marks?+
No. Purified water contains no minerals and dries without marks, unlike tap water.
Do you work in all weather?+
We don’t work at height in rain or strong wind, for safety and for a lasting result. The schedule is adjusted accordingly.

Free quote, within 6 working hours.

Tell us what you need, no obligation.

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