The Starmark Evo 7500 Series

Starmark Evo offers an elegant and modern design inspired by traditional colonial windows.

Combining the energy efficiency of vinyl with the timeless beauty of a classic wood window, the Starmark Evo sets a new standard by surpassing even the most stringent Energy Star guidelines.

What Makes the Starmark Evo Window so Impressive?

The Starmark Evo window is meticulously crafted with Advanced Polymeric Composite, giving it beauty, performance and durability that outshines It’s competitors in today’s crowded market.

Advanced Polymeric Composite

The construction material of the Starmark Evo is what really makes it a stand out amongst its peers. APC provides a solid sash and frame construction that does not require additional insulation. These rigid, interlocking pieces allow for a tight seal to minimize air leakage and drafts.

Premium Glass Coating and Spacer Options

The Starmark Evo uses an advanced robotic system that uses heat and compression for a flawless glass spacer seal, preventing condensation for a clear, damage-free view. The Starmark Evo Heat Seal Coating harnesses the sun’s warmth for increased energy efficiency in cold climates. Alternatively, Sun Seal Coating blocks solar heat, keeping interiors cool and comfortable in warmer areas.

Solid Sill Construction

A one piece solid sill improves drainage and eliminates the need for weep holes that tend to collect water and freeze in the winter months. The unique dual dam construction also decreases air infiltration and improves overall window performance.

Keystone Certification

All Starmark Evo windows have met the KeyStone Certification Guidelines that ensure each window is built to its stated specifications. Certification also includes annual factory inspections to ensure quality management systems meet rigid standards. This means peace of mind for homeowners.

Why Do We Prefer OKNA Windows?

 OKNA Windows has built an industry reputation by combining state-of-the-art equipment, advanced technologies, and dedicated craftsmanship. We know OKNA windows are built to last and will keep your home looking beautiful and your family comfortable for years to come.

Air infiltration (or air leakage) measures how much outside air can sneak in through tiny gaps in a new window. The lower the number, the more energy-efficient your window is—because the air you’ve already heated or cooled stays where it belongs. And while solar coatings help only when the sun is shining, airtight windows improve efficiency 24/7. That’s why we strongly recommend Okna windows. They’re engineered to be exceptionally airtight, and the Okna EnviroStar Double Hung boasts an air infiltration rating of 0.01 - the best in the industry!

Design pressure (DP) refers to how much external force a window can withstand without compromising its structural integrity. It measures a window’s ability to resist wind, water, and other environmental pressures. Okna windows have some of the highest DP ratings available for residential replacement windows.

Okna windows are renowned for their exceptional appearance and meticulous craftsmanship. Their sleek profiles and clean lines create a timeless, elegant look that enhances any home. With a wide range of styles, finishes, and colors, homeowners can easily customize their windows to match their architectural style and personal preferences. The precision manufacturing behind every Okna window ensures a refined, sophisticated finish.
Arched bow window with cushioned seat and garden view

What Okna Window Is Right for My Home?

Okna has several options to fit your design needs and budget. Here are a few of our favorites.

Casement and awning windows

Starmark Evo

Casement Windows offer beauty and functionality. The superior design makes it ideal for not only single windows but also for multiple assemblies like bows, bays, and picture windows as well as your own original combinations. A beveled screen frame offers the appearance of wood molding for added beauty.

Kitchen with energy-efficient Enviro-Star window above sink

Enviro-Star

The Okna Enviro-Star is Okna’s premier Replacement Window. The Enviro-Star combines superb craftsmanship with an old world look and feel. This Series offers a myriad of glass and structural options to seamlessly blend with any décor while providing the utmost in energy efficiency. Since all Okna products are custom-made, you can be sure of a perfect fit every time.

Modern living room showcasing Insul‑Tec replacement windows

Insul-Tec 500

The Insul-Tec combines excellent craftsmanship with a traditional look and feel. This series offers all the benefits you come to expect from vinyl windows with a variety of options to make your home energy efficient while enhancing its beauty. Since all Okna products are custom-made, you can be sure of a perfect fit, which translates to savings on time and labor during installation.

Our Reviews Speak for Themselves

Our reputation for client service excellence means everything to us. Our Client Care process ensures you are informed throughout your project, with no surprises. As you can see from our hundreds of 5-star reviews, we consistently exceed our clients’ expectations. We look forward to showing you the “WoW difference” in home improvement contracting.

Everyone at WoW went above and beyond, and exceeded my already high expectations. Our house is now warmer, quieter, and looks so much better!

Anne D.

Window Replacement Centreville, VA

Simply put, it was one of the best contracting / house project experiences we’ve had.

Trey P.

Window Replacement Vienna, VA

You Are 3 Easy Steps Away from Project Success!

  • Schedule a No-Pressure Consultation

    One of our experts will discuss your project either in your home or virtually

  • Discuss Your Project

    Our expert will learn about your needs, ask some questions, and suggest the best products and service for your specific project and budget, empowering you to make informed decisions

  • Choose WoW and Relax!

    When you choose to partner with us, you can rest assured we will take care of every detail and keep you informed every step of the way

Exterior shot of home showing Three‑step home improvement process