Windows
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Custom Windows That Match Your Vision – Built to Perform, Designed to Last
Windows play a crucial role in every home—not only shaping the building’s character but also influencing comfort, security, and energy performance. At OKNOPLAST, we specialize in custom windows that combine modern European craftsmanship with cutting-edge technology. Whether you’re replacing old frames or planning a new build, our wide range of uPVC windows and Tilt and Turn windows can be tailored to fit any design, size, or energy goal.
What sets OKNOPLAST apart is our relentless focus on energy efficiency. Our energy efficient windows are engineered with multi-chamber profiles, Low-E glass, and advanced seals that drastically reduce heat transfer. This means warmer winters, cooler summers, and significantly lower energy bills – without compromising on style. Whether you’re installing windows in a passive home or a standard residence, OKNOPLAST provides window systems that exceed expectations.
We’re proud to offer the increasingly popular Tilt and Turn windows, known for their smart functionality and secure ventilation. With just one handle, you can tilt the sash inward for gentle airflow or swing it wide open for full access and easy cleaning. These windows are ideal for families, pet owners, and anyone who values a safer, more versatile window solution.
Our custom window solutions also support superior noise insulation, creating quieter, more peaceful interiors—even in busy urban areas. Thanks to innovative construction and high-performance glazing, OKNOPLAST windows block unwanted noise while letting in plenty of natural light.
Durability is another cornerstone of our product design. All of our uPVC window frames are weather-resistant, maintenance-friendly, and built to last for decades. No cracking, warping, or fading—just long-lasting performance and timeless aesthetics. Plus, our wide palette of colors, wood-like finishes, and hardware options ensures a look that’s completely yours.
From single-sash casement styles to large panoramic designs, our windows are available in a variety of configurations to meet diverse architectural needs. Whether you’re upgrading to triple-pane insulated units or seeking unique shapes, OKNOPLAST is your go-to partner for premium energy efficient custom windows in the U.S.
Looking for a reliable windows installer? Our certified installation network ensures your new windows are fitted with precision – so you get all the benefits of insulation, security, and airtight sealing from day one.
Backed by decades of experience and a strong presence across Europe and North America, OKNOPLAST is a trusted name in high-performance window systems. Choose us for unmatched design flexibility, energy savings, and lasting peace of mind.