Delila Denivelle
12 October 2026
Vlotte communicatie en top service!
For homes & businesses
Professional window cleaning and façade cleaning in Leuven & Flemish Brabant
Professional cleaning for homes and businesses in Leuven and Flemish Brabant. From streak-free windows to safe façade cleaning and RENEW colour restoration — as a one-off service or on a regular basis.
Voor
Na
Drag to see the difference
- Homes & businesses
- Serving Leuven and Flemish Brabant
- No-obligation quote
- Direct contact via WhatsApp
What customers say about DE KOZIJNS
Google
Kobe Vande Cauter
12 October 2026
Jens kwam bij ons langs voor het reiningen van de ramen, poort en zonnepanelen. De buren kwamen vragen van waar onze nieuwe poort kwam. Top werk en service dus!
Elvis Zehic
12 October 2026
Uitstekende service en ramen zien er terug heel proper uit!
Window cleaning, façade cleaning and colour restoration
Our three core services for homes and businesses in Leuven and Flemish Brabant.
Professional window cleaning
Streak-free windows for homes, shops, offices and buildings. One-off cleaning or a regular maintenance schedule.
- Interior and exterior cleaning
- Frames and window sills
- Pure-water or traditional cleaning
- One-off or regular maintenance
Safe façade cleaning
Remove algae and atmospheric dirt from render and brickwork with a gentle treatment tailored to the surface.
- Suitable for render and brickwork following assessment
- No aggressive high-pressure cleaning
- Optional water-repellent treatment
- Cost estimate based on surface area and photos
RENEW colour restoration
Restore a rich, well-kept colour to weathered garage doors, aluminium windows and other exterior joinery without replacing them.
- For weathered aluminium and suitable plastic surfaces
- Restores colour and appearance
- Quick turnaround
- A practical alternative to replacement or repainting
We assess the surface beforehand to choose the right method every time.
Care for the rest of your exterior too
From patios and driveways to conservatories, solar panels and gutters: De Kozijns keeps the entire exterior of your home or business looking its best.
Patios & driveways
Remove algae, moss and dirt from patios, driveways and paths.
Find out more
Conservatories & canopies
Streak-free cleaning of glazing, roof panels and aluminium structures.
Find out more
Solar panel cleaning
Improve efficiency by removing dirt, pollen and deposits from your panels.
Find out more
Roofs & gutters
Roof cleaning and clearing and checking gutters and downpipes.
Find out more
Other exterior cleaning
Other outdoor surfaces? Explore our full range or ask us.
Find out moreAlways clean windows, without having to think about it
Choose a one-off clean or have your windows added to our regular cleaning round. Together, we agree on a frequency that suits your home or business.
One-off cleaning
A thorough clean whenever it suits you, with no further commitment.
Regular maintenance
Your windows are automatically included in our regular cleaning round.
Tailored maintenance for businesses
A schedule and frequency tailored to your shop, office or building.
See the difference
Real window cleaning, façade cleaning and RENEW colour restoration projects.
Before
After
Façade cleaning
Softwash treatment for a brilliant finish
Algae and dirt completely removed with our enzyme-based cleaning. The result: a façade that looks like new again.
Before
After
Window cleaning
From limescale to crystal clear
Stubborn limescale and dirt professionally removed with pure water. Streak-free results and maximum daylight.
Before
After
Gutter cleaning
From blocked to free-flowing
Pine needles, leaves and mud thoroughly removed. Drainage checked and gutter fully functional again.
Before
After
Conservatory cleaning
From dirty to crystal clear
Algae and dirt removed from the conservatory roof with pure water. Maximum daylight restored.
Before
After
Window frame cleaning
From dirty to brilliant white
Dirt and algae professionally removed from PVC window frames. Ready for RENEW treatment.
Before
After
Insect screens
From algae-covered to clean
Insect screens thoroughly cleaned and algae removed. Optimal ventilation and clear views restored.
Solar panels
Before and after - maximum efficiency
Dirt, pollen and bird droppings significantly reduce efficiency. Cleaning restores optimal energy output.
Featured projects
RENEW
Garage door – RENEW
PVC garage door treated with RENEW. Water- and dirt-repellent, protected for 24 months.
Conservatory cleaning
Complete conservatory cleaning: glazing, aluminium structure and roof panels. Safe, streak-free results.
Why choose De Kozijns?
Personal, direct contact
You always speak to the people who do the work themselves
One partner for windows, façades and exterior joinery
Everything for the exterior of your home or building in one place
Safe treatment tailored to the surface
We assess the surface beforehand and choose the right method
For homes and businesses
Homes, shops, offices and shared buildings
Serving Leuven and all of Flemish Brabant
Leuven, Herent, Heverlee, Oud-Heverlee, Tervuren, Overijse and surrounding areas
Clear agreements and careful workmanship
Clear estimates, agreed schedules and a tidy site on completion
For professionals
For shops, offices and buildings too
De Kozijns provides one-off and regular window cleaning for businesses, shops, offices and shared buildings. Façades, solar panels and other exterior surfaces can also be included in your maintenance plan.
Kantoren
Streak-free windows and clean façades for a professional appearance. Regular scheduling outside office hours available.
Bedrijven & KMO's
Maintenance contracts for business premises, showrooms and industrial buildings. One dedicated point of contact.
Syndici & VME's
Regular maintenance of shared areas, windows and façades of apartment buildings. Clear invoicing for each owners’ association.
Why businesses and property managers choose us
- A consistent team, no subcontractors
- Tailored maintenance contract (monthly, quarterly or annually)
- One point of contact & clear invoicing
- Insured, using recognised working methods
- Flexible scheduling outside opening hours
- Reports available for each visit
Request a no-obligation proposal for your office, business or owners’ association. We visit your premises for an inspection and provide a clear maintenance plan. Find out more about our window cleaning for businesses.
No obligation · Response within 24 hours · Tailored contract
How does it work?
From enquiry to completion in three clear steps
1
Enquiry
Tell us which service you need and, if possible, include a few photos.
2
Proposal
You receive a clear cost estimate, or we arrange a site visit first.
3
Completion
We carry out the work using the agreed schedule and method.
Service area
Serving all of Flemish Brabant
From Leuven and Herent to Diest, from Tervuren to Overijse — select your municipality for a local page on window cleaning, façade cleaning and related services.
- Window cleaning Leuven
- Window cleaning Kessel-Lo
- Window cleaning Heverlee
- Window cleaning Oud-Heverlee
- Window cleaning Wijgmaal
- Window cleaning Herent
- Window cleaning Tervuren
- Window cleaning Zaventem
- Window cleaning Diest
- Window cleaning Aarschot
- Window cleaning Tienen
- Window cleaning Haacht
- Window cleaning Rotselaar
- Window cleaning Bertem
- Window cleaning Kortenberg
- Window cleaning Overijse
Our services
From windows to roofs, façades to solar panels. We deliver sparkling results.
Window cleaning
Inside and out, by hand or with pure water for streak-free results.
Find out moreSolar panel cleaning
Maximise efficiency with professional solar panel cleaning.
Find out moreFaçade cleaning
Enzyme-based softwashing for thorough, safe cleaning.
Find out morePatios & driveways
Remove algae and dirt for a like-new finish.
Find out moreRoof cleaning
Professional softwash roof cleaning for lasting results.
Find out moreGutter cleaning
Prevent water damage from blocked gutters. Complete cleaning and inspection.
Find out moreFrequently asked questions
Have a question? We’re happy to help.
Yes. We work on homes as well as shops, offices and shared buildings.
Yes. Choose a one-off clean or a regular frequency, and we’ll add your windows to our maintenance round.
Yes, interior cleaning is available. Please specify whether you need exterior cleaning, interior cleaning or both when enquiring.
In many cases, yes. We first assess the surface using photos or a site visit before recommending a method.
A water-repellent treatment can be offered as an optional extra, depending on the condition and type of surface.
RENEW is used on weathered aluminium and suitable plastic surfaces, such as garage doors, windows and doors. The surface is assessed beforehand.
We work in Leuven, Herent and the wider Flemish Brabant area. Feel free to ask whether your municipality is within our service area.
Yes. You can add photos using the quote form, the façade calculator or WhatsApp. This helps us provide a realistic estimate.
What can we clean or restore for you?
Send us a few details and, if possible, some photos. We’ll review your enquiry and get back to you quickly.