FIND THE RIGHT ANSWER

Frequently Asked
Questions & Answers

Here you will find clear and practical answers to the most
frequently asked questions about our window frames, installation, service and maintenance.
Installation
Our installation teams work quickly, neatly and efficiently. You only need to clear the windows and remove curtains – we do the rest, from removal to finishing.
Price
The price depends on the type of window frame, material and dimensions. You will receive a no-obligation tailored quote within 24 hours. We also assist with applying for subsidies.
Guarantee
We offer up to 5 years' guarantee on all our products and installation. In case of any issues, we ensure fast service and support.
Lead times
For PVC window frames, expect 4–6 weeks; for aluminium window frames, 4–10 weeks, depending on the product type.
Service
We offer a maintenance subscription with 1 to 2 visits per year for inspection and maintenance. This keeps your window frames performing like new for years to come.

What can you
expect from us?

We guide our clients in choosing high-quality window frames and matching solutions. From advice to installation, we ensure a clear process, transparent communication and a professional finish.
How do I know it is time to replace my window frames?

If you feel draughts, notice condensation on the glass or find your heating bills are high, that is a sign that the windows are no longer doing their job. New window frames improve the comfort, insulation and appearance of your entire home.

How can new window frames reduce my heating costs?

Modern windows offer better thermal insulation; they keep warmth in during winter and protect against heat in summer. This can save you up to 30–40% on energy costs!

What is the difference between aluminium and PVC window frames?

Aluminium window frames are durable, elegant and ideal for modern projects with large glass surfaces. PVC offers outstanding insulation, is more affordable and suits traditional homes perfectly.

Is the installation of window frames disruptive for residents?

Not at all! Our installation teams work efficiently and cleanly. We cover the areas and leave everything neat and tidy after installation – your home is immediately ready for use, no building site.

How do I prepare my home for installation?

You only need to clear the windows and remove curtains and items from the window sills. Our specialists do the rest – from removing the old windows to precise finishing.

Can I choose the colour and style of the window frames myself?

Of course! We offer a wide range of colours, finishes and profiles – from classic to modern. We help you choose a look that perfectly matches the style of your home.

What does the maintenance subscription include?

A maintenance subscription is a convenient solution for those who want peace of mind for years to come. One or two times a year we visit to check the seals, lubricate the hardware and ensure the windows continue to work like new.

What is the lead time from measurement to installation?

The lead time for PVC window frames is 4 to 6 weeks. For aluminium window frames, expect 4 to 10 weeks. We keep you informed every step of the way.

Do you help with subsidies for replacing window frames?

Yes! With us you arrange everything in one place. When purchasing window frames, we also offer a service for submitting the subsidy application, which is handled by an agency with extensive experience.

Subsidy for energy-efficient windows in the Netherlands

How long is the guarantee on windows and doors?

We offer up to 5 years’ guarantee on all our products and installation. You have the assurance that the windows will function well for years, and in the event of any issues we provide fast service and support.

Get in touch

Do you have a question or would you like a free, no-obligation quote for your window frames, windows or doors? Leave your details and we will contact you as soon as possible.

    Fields marked with are required.

    D-KozijnenHeadquarters
    Custom window frames for homes that deserve more than standard. Personal contact, clear advice and craftsmanship on every project.
    Onze locatieWhere to find us?
    Locatie van D-Kozijnen in Wassenaar, Zuid-Holland
    Get in touchD-Kozijnen Social links
    Stay connected with us and discover our latest projects, updates and inspiration.
    D-KozijnenPersonal contact
    Custom window frames for homes that deserve more than standard. Personal contact, clear advice and craftsmanship on every project.
    Onze locatieWhere to find us?
    Locatie van D-Kozijnen in Wassenaar, Zuid-Holland
    Get in touchD-Kozijnen Social links
    Stay connected with us and discover our latest projects, updates and inspiration.