We want to give people better windows in terms of functionality, quality, durability and personalized design.
Use Tilt and Turn Windows - it’s that easy!
Discover OKNOPLAST’s premium uPVC windows, featuring Tilt and Turn technology for unmatched functionality, energy efficiency, and modern design.
Explore a dedicated space designed for professionals like you. Whether you're an architect, builder, or contractor — find smart solutions, technical specs, and premium products ready to elevate every project. Discover why more pros are choosing OKNOPLAST.
Explore completed residential and commercial spaces featuring OKNOPLAST solutions.
Browse our gallery of bold designs and find the spark for your next project
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Tilt and Turn Windows. Smarter by design.
Experience unmatched flexibility and function with OKNOPLAST Tilt and Turn windows. Enjoy secure ventilation, easy cleaning, and sleek aesthetics—engineered to elevate any space.
Get to know us
At OKNOPLAST, we’re more than just windows. We’re a family-run business with a global mindset, driven by innovation, design, and a passion for better building. Discover who we are—and why so many professionals choose to partner with us.
We’re here to support you at every stage
Request a quote, consult your project, or simply ask us anything—we’re ready to help make your vision a reality.
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What makes UPVC windows and doors a smart choice for American homes?
Discover the perfect combination of European engineering and American performance with OKNOPLAST’s premium UPVC windows and doors. Designed for energy efficiency, safety, and modern style – our products offer long-term value for homeowners, builders, and architects across the U.S.
How are OKNOPLAST windows designed for the U.S. market?
At OKNOPLAST, we specialize in high-performance UPVC windows tailored for American standards and climates. From energy-efficient tilt and turn systems to fully customizable solutions, our windows deliver superior thermal insulation, noise reduction, and security.
- Energy-saving glazing options
- Durable, low-maintenance materials
- Compliant with U.S. building codes
Whether for new construction or renovations, our UPVC windows meet the highest expectations.
What are tilt and turn windows, and why do they matter?
Our tilt and turn windows combine two opening options in one intuitive design:
- Tilt for secure, draft-free ventilation
- Turn for wide access and easy cleaning
- Multi-point locking system for maximum security
With features ideal for families, seniors, and pet owners, these windows deliver flexibility, functionality, and peace of mind.
How can you personalize your windows and doors?
Design your dream windows and doors with full customization options:
- Choose from styles like casement, sliding, awning, and more
- Select from over 50 color finishes, including wood-look and matte tones
- Explore unique shapes such as arched, round, and trapezoidal
- Add privacy or decorative appeal with ornamental or solar-control glass
With OKNOPLAST, form meets function – without compromise.
Why do professionals and homeowners trust OKNOPLAST?
With over 30 years of innovation and a presence in 20+ countries, OKNOPLAST is a proven leader in UPVC technology. We’re now bringing our expertise to the U.S. market with:
- Products tested to withstand Category 5 hurricane forces (up to DP-90)
- Nationwide installation and support
- Strong warranty coverage
- Systems compliant with ADA and Passive House standards
Our windows and doors are not just built – they’re engineered for comfort, performance, and reliability.