OKNA uPVC Casement Windows for New Construction & Replacement – CT & MA
OKNA uPVC casement windows offer premium functionality, lasting durability, and sleek appearance—ideal for both new construction and replacement projects. With a full 90° sash opening, easy-to-use crank handle, and integrated nailing flange, these windows are designed for versatility and modern performance. SEVEN SUN proudly serves homeowners, DIY clients, builders, contractors, developers, and architects across Connecticut and Western Massachusetts.
Request your FAST Free Quote today — and experience the next level of casement window performance.
Full 90° Opening – Maximum Ventilation and Easy Cleaning
OKNA casement windows open a full 90 degrees, allowing maximum airflow and effortless cleaning from inside the building—a major benefit for multi-story homes and commercial spaces. Their smooth folding crank handle tucks away neatly and provides consistent performance with minimal effort, even in tighter areas or over kitchen counters.
Built for New Construction or Replacement Installs
Equipped with an optional nailing flange, these windows install securely in new builds while also adapting perfectly for replacement work. This flexibility makes them ideal for residential remodels or light-commercial upgrades where performance and ease of installation matter.
Strong Fusion-Welded uPVC Frame & Triple Weatherstripping
The multi-chambered uPVC frame is fusion-welded at every corner for structural integrity, thermal resistance, and air-tight sealing. Triple weatherstripping adds enhanced protection from wind, rain, and seasonal extremes—ideal for the New England climate.
Efficient Thermal Performance (U-Value ≤ 0.20)
These energy-efficient casement windows offer U-values as low as 0.20 Btu/hr·ft²·°F, helping projects meet ENERGY STAR guidelines and reducing long-term energy costs. Advanced Low-E glass and argon gas fills are standard for all glazing packages.
Secure, Quiet, and Air-Tight Performance
The standard multi-point locking system ensures tight closure along all contact points for improved security, reduced noise, and superior air sealing. Optional WOCD child-safety latches are also available for added peace of mind.
Available in Jet Black and Other Modern Finishes
Match today’s most popular design trends with Jet Black, almond, or other custom-painted exteriors. These bold colors are increasingly specified by architects and developers seeking high-contrast modern aesthetics for both homes and commercial properties.
Flexible for Residential and Commercial Projects
We offer:
- Installation + supply for homes, small commercial buildings, and smaller apartment complexes
- Supply-only for larger commercial builds, retail plazas, and multifamily projects
These casement windows are ideal for offices, retail stores, townhomes, and more—delivering flexibility and reliability.
Custom Hardware, Grids, and Screen Options
Enhance your window’s functionality and look with:
- Fold-down crank handles in black, nickel, white, or bronze
- Colonial or contemporary interior grid patterns
- ThruVision® screens or upgraded mesh options
- Decorative and privacy glass options
Full Technical Documentation with Every Order
All quotes and deliveries include:
- U-value specs, SHGC, and VT details
- Frame drawings and nail fin specs
- Finish samples and hardware details
- OKNA warranty and certification paperwork
Our OKNA uPVC casement windows are engineered for high-performance in new construction and replacement projects throughout CT and Western MA. With their 90° sash opening, triple weather seals, modern black frame options, and nailing flange compatibility, they’re a contractor favorite for both light-commercial and residential applications.
Whether you need full installation or supply-only delivery, SEVEN SUN works with homeowners, DIY clients, architects, developers, and commercial builders to deliver success on every job.
Request your FAST Free Quote today — and discover what truly efficient windows can do for your project.