High-performance Tilt and Turn windows and doors designed for residential and commercial spaces.
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.
Discover OKNOPLAST’s premium uPVC windows, featuring Tilt and Turn technology for unmatched functionality, energy efficiency, and modern design.
Forget the guesses. Watch Steve walk the floors, test the hardware, and expose why OKNOPLAST’s steel-reinforced, triple-glazed Tilt and Turn systems outperform anything America calls “premium.”
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.
Want more from your window business?
Discover the opportunity to grow with one of Europe’s leading window & door brands. With innovative products, strong marketing support, and a trusted network, OKNOPLAST helps you stand out – and sell more.
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Engineered in Europe. Made to Measure for American Architects, Builders, and Homeowners.
OKNOPLAST brings Tilt and Turn Windows – along with uPVC and aluminum patio doors and entry doors – to architects, general contractors, and developers across the US market, with a growing base of homeowners specifying the same systems for custom builds and renovations.
Made to measure is our standard, not an upgrade. Every window and door is manufactured to your exact project dimensions at no additional cost, with a lead time of 8-10 weeks – often competitive with, or faster than, other US manufacturers producing comparable custom orders. That same design freedom carries through every size and configuration: floor-to-ceiling installations and non-rectangular formats hold the same energy performance as standard sizes, with U-Factor as low as 0.14.
OKNOPLAST was founded in 1994 in Poland by Adam Placek. Over more than 30 years, that experience has shaped a company philosophy built around balancing energy efficiency, security, design, and functionality – principles embedded in the business from day one as a family-owned European manufacturer.
Oknoplast USA: European uPVC and Aluminum Window and Door Systems for the US Market
Our European-engineered systems are built to our internal quality standards, verified through our own testing protocols, and refined continuously by our research and development team in partnership with established European suppliers.
Our Tilt and Turn Windows are available in uPVC and aluminum profiles, with 50+ color and finish options and exact, made-to-measure manufacturing – matched by Lift and Slide Patio Doors and uPVC and aluminum entry door systems built to the same standard.
With a dealer network spanning more than 3,500 partners across 21 countries, and a growing presence across the United States, OKNOPLAST brings decades of European manufacturing experience to American homes and commercial projects.
Every OKNOPLAST product purchase comes with a 10-year warranty covering manufacturing defects in materials and workmanship, plus dedicated coverage for exterior color finish.