Plastic windows
Plastic windows are a proven and economically efficient solution for new buildings and renovations. They offer very good thermal insulation properties, easy maintenance and long service life. Thanks to modern profiles and high-quality workmanship, plastic windows today meet high demands on living comfort and energy efficiency. At SULKO — from profile type to glazing to. Plastic windows are thus not a compromise in our country, but a reliable solution with maximum value for the funds invested.

Plastic window Synego
- Excellent thermal insulation
- Building depth 80 mm with 7 isolation chambers
- Sound insulation up to 47 dB
- Sized for the best glass
- The highest strength in its class
- Two or Three Sealing Planes






Plastic window Classic
- A proven product for years
- Building depth 70 mm with 5 isolation chambers
- Sound insulation up to 44 dB
- Double and triple glass
- Excellent performance/price ratio
- Flat and design wing design





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Get to know our products live and get advice from experienced specialists. In SULKO showrooms you can try different types of windows, doors and accessories and get recommendations for your project.
Plastic windows are among the most common type of windows for family houses, apartment buildings as well as reconstruction of older buildings. Modern plastic windows today combine very good heat-insulating properties, long service life and minimal maintenance requirements. Thanks to technological developments, they are able to meet the high requirements for energy efficiency of modern buildings.
At SULKO we produce plastic windows tailored to each building. When designing solutions, we take into account the architecture of the house, the size of the glazed areas and the requirements for energy efficiency. The result is windows that combine functionality, modern design and long-term reliability.
REHAU Profile Systems
The basis of SULKO plastic windows are modern profile systems REHAUwhich are among the technological leaders in the field of window profiles. These systems are characterized by high stability of the structure, long service life and very good heat-insulating properties.
SULKO Classic (Brillant-Design)
system It's classic, are among the proven profile systems for plastic windows.
The main features of the system:
- construction depth approx. 70mm
- multi-chamber profile construction
- the possibility of using double and triple glazing
- very good thermal insulation properties
- high stability of the structure
The Brillant-Design system is suitable for new buildings and renovations of family houses, where a good ratio of price, quality and energy efficiency is important.
SULKO SYNEGO
system SYNEGO represents a modern plastic window system with a high level of energy efficiency.
Advantages of SYNEGO:
- very good thermal insulation properties
- high tightness against penetration of air and water
- good noise protection
- stable construction suitable for larger glazed areas
SYNEGO is a suitable solution for modern family houses as well as energy-efficient buildings.
Invisible Joint Technology
The great advantage of plastic windows SULKO is modern technology invisible connection, sometimes also referred to as zero discord.
In ordinary plastic windows, plastic welds formed during the joining of profiles are visible in the corners of the frame. Invisible joint technology eliminates this detail, and the corners of the windows remain perfectly clean.
The result is:
- more elegant appearance of windows
- smooth corners without visible welds
- modern design approaching aluminum windows
This detail significantly improves the aesthetics of plastic windows and is among the elements that distinguish modern SULKO windows from ordinary plastic windows.
Balcony door
Window systems can also be included plastic balcony doorthat connect the interior of the house with a balcony, terrace or garden.
Structurally, balcony doors proceed from window profiles and offer:
- very good thermal insulation properties
- simple and comfortable operation
- stable frame and sash construction
- possibility of large glazed areas
Balcony doors are a suitable solution for family houses, apartments and renovations.
French windows
Modern architecture often uses French windowswhich extend to the floor and allow the maximum supply of daylight into the interior.
French windows bring several advantages:
- more natural light in the interior
- modern look of the house
- visual connection of the interior with the exterior
French windows are often used in living rooms, bedrooms or at the entrance to the terrace and garden.
Custom-made plastic windows
Each house has different requirements for both design and functionality. That is why at SULKO we always produce plastic windows tailored to a specific construction.
When designing solutions, we take into account:
- architecture of the house
- size and orientation of window openings
- Thermal insulation requirements
- design and color
Thanks to this, SULKO plastic windows can offer a solution that combines modern technology, aesthetics and long-term reliability.



