Dutch-style PVC window frames (kozijnen) for brick façades
Dutch construction uses a different window: a wide, deep frame (kozijn) set into a cavity brick wall, with a slimmer sash. RS Concept, a Polish window and door supplier, delivers PVC frames made to the Dutch system, with a 120 mm frame depth. Lead time is from 3 weeks. Send your window schedule (kozijnstaat) or drawings, and you receive an itemised quote.
Supply only: installation is done by your own installer or contractor.

Why a Dutch frame is different
A Dutch frame is built for the cavity wall and the brickwork, often with a rebate on the outside. Standard continental windows don't fit that detail and cause problems at the junction. That is why we work with a 120 mm profile that is made for this way of building.
What you can choose
- Depth: 120 mm frame, for cavity walls and clean brickwork.
- Corners: welded at 45° or joined at 90° (HFL) for a real timber look.
- Glass: units up to 52 mm thick, so triple glazing fits.
- Reinforcement: steel reinforcement closed inside the frame.
- Colours: white, cream or anthracite core; solid colours and wood-grain foils inside, outside or both, chosen separately.
- Extras: window bars, concealed hardware, ventilation grilles and matching doors.
The frame suits new-build and renovation. Lead time from 3 weeks, confirmed in each quote.
Timber look without repainting
With 90° joints and wood-grain foil, a PVC frame comes close to a painted or stained timber frame, without the repainting. If you want real timber, see our wooden windows from Poland.
For developers, contractors and installers
Most enquiries come from projects: series housing, apartments and renovation, elevation by elevation. We quote from your full schedule, keep your item numbers and can deliver in phases to match the build programme. Installers receive supply only and fit the frames themselves. For the overview of all products, see windows and doors from Poland; Dutch-language visitors can use kunststof kozijnen uit Polen.
We don't publish list prices, because the price depends on size, layout, glazing and options. Technical data and delivery terms are stated in your quote.
From schedule to delivery
- Schedule. Send widths, heights, layout and swing directions, or drawings as a PDF.
- Quote. Itemised, with technical data and delivery terms.
- Production. After final sizes and the order are confirmed, the frames are made to measure in Poland.
- Delivery. We arrange transport to your site in the Netherlands or Belgium, with the date agreed beforehand.
Supply only: installation is done by your own installer or contractor.
Frequently asked questions
What makes a Dutch frame different?
The frame is much wider and deeper (120 mm) and made for the Dutch wall build-up and mounting details, often with an outside rebate for brickwork.
Can PVC look like a wooden kozijn?
Yes. With 90° joints (HFL) and wood-grain foils it looks close to a painted or stained timber frame.
What is the lead time?
From 3 weeks for PVC, after the order and final sizes are confirmed. The date is given in the quote.
How does VAT work when buying from Poland?
For businesses with a valid EU VAT number, the supply is normally invoiced without Polish VAT and the buyer accounts for VAT under the reverse charge. For private customers the general rules apply. The exact treatment is set out in your quote.
Do you install the frames?
No, we supply only. Installation is done by your own installer or contractor.
