uPVC frames
1930s house, Utrecht
Single glazing replaced with HR++ in uPVC frames with authentic glazing bars.
Premium windows. Professional installation.
Better-looking, energy-efficient windows — without the hassle
From first advice through to installation, we handle everything. uPVC and aluminium frames, front doors, sliding doors and windows that make your home quieter, warmer and more attractive.
- Free survey
- 10-year guarantee
- In-house fitters
- KOMO certified
Request your free quote
Leave your details and we'll arrange a no-obligation survey at a time that suits you.
- 10 years
- guarantee on product and installation
- 7 days a week
- reachable 09:00–20:00
- Free
- quote and advice, no obligation
Our range
The right solution for every window and door
All made to measure and fitted by our own craftsmen — whether it's a single window or an entire facade.
uPVC frames
Low maintenance, quiet and exceptionally well insulated.
The most popular choice: uPVC frames insulate superbly, never need painting and last for decades. Available in every RAL colour and in woodgrain finishes.
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Aluminium frames
Slim profiles, maximum glass and plenty of daylight.
Strong and sharp: aluminium allows narrower profiles, so more glass and more light. Ideal for large window walls and a contemporary look.
Request a quoteFront doors
A warm welcome with burglar-resistant locking.
Your front door sets the first impression. We supply doors with multi-point locking, SKG-approved hardware and insulation you'll notice in the hallway.
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Sliding doors
Bring the garden inside, without draughts or cold.
A lift-and-slide door runs smoothly, seals tightly and gives you an uninterrupted view of the garden. Even at large widths it stays effortless to operate.
Request a quoteWindows
More comfort and a lower energy bill.
From tilt-and-turn to fixed glazing: with HR++ or triple glazing you keep the heat in and the noise out. Can also be replaced individually in existing frames.
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Something else in mind?
Dormer, garage door or an unusual bespoke solution? Tell us what you're looking for — we'll gladly think it through with you, no obligation.
Why Kozedor
Quality you can see, feel and earn back
You buy new frames once every thirty years. That's why we get it right first time.
Lower energy bills straight away
HR++ or triple glazing in well-insulated profiles: less heat loss, fewer draughts and a noticeably lower heating bill.
Expert installation
Your frames are fitted by our own experienced installers — no rotating subcontractors. Neatly finished and left tidy.
10-year guarantee
On both the product and the installation. One point of contact if anything comes up, with no referrals back to the supplier.
Our own quality standard
We work exclusively with KOMO-certified profiles and SKG-approved hardware. No compromises on security.
Fast delivery
Made to measure in four to six weeks, with a fixed installation date agreed in advance — and kept.
Personal advice
One adviser from quote to handover. They know your home, your wishes, and are simply reachable on their own number.
How it works
From enquiry to installation in four steps
You know in advance exactly what happens, when it happens and what it costs.
Step 01
Enquiry
Response within 24 hours
You tell us what you're looking for via the form. We call you to discuss your wishes and book an appointment.
Step 02
Free survey
About 45 minutes
Our adviser visits, measures everything precisely and advises on material, glazing and colour. You get a fixed price — no surprises later.
Step 03
Made to measure
4 to 6 weeks
Your frames are made to measure on our own production line. We'll be in touch as soon as the installation date is confirmed.
Step 04
Installation
Usually 1 to 2 days
Our fitters install everything expertly, finish the inside and outside neatly and leave your home clean.
What customers say
More than a thousand homes on
Our customers rate us well above average. That's what we do it for.
The fitters arrived exactly on time and had everything installed within two days. The difference in street noise is genuinely enormous.
The Bakker family
Utrecht · uPVC frames
We got a clear price up front and it stayed exactly that. Good to know there were no extra costs tacked on afterwards.
Ms De Groot
Amersfoort · Front door and windows
Our sliding door opens with one finger. The adviser thought carefully about the layout with us, which saved us money in the end too.
The Yildirim family
Nieuwegein · Sliding door
Certified by and affiliated with
- KOMO
- SKG-IKOB
- CE
- Bouwgarant
- VCA
Projects
The difference is immediately visible
A selection of recently completed homes — the same facade, before and after installation.
Before After 
Before After Sliding doorSemi-detached house, Amersfoort
Rear facade opened up with a 4.2-metre-wide aluminium sliding door.
Frequently asked questions
Good to know
Can't find your question? Give us a call — even if you're only just starting to explore.
Need help?
Philip Meijer
Adviser at Kozedor
Mon–Fri, 08:00–17:30
Rather just talk it through?
No obligation and no sales pitch — simply straight answers about what is possible for your home and roughly what it costs. Ask us anything, even if you are only starting to look.
Or request a free quoteFree and without obligation
Request a free, no-obligation quote
Fill in the form and we'll contact you within 24 hours to arrange a free survey. After that you'll know exactly what it costs — without committing to anything.
Response within 24 hours
On working days we usually call you back the same day.
Free survey at your home
Including advice on material, glazing and colour — and a fixed price.
No obligation
An enquiry commits you to nothing. You decide once everything is clear.
Prefer to speak to someone directly?
+31 6 83 33 03 00Your free quote
Tell us briefly what you're looking for. The more we know, the better we can advise you.