Precision-built frames
Every sash and frame is manufactured to tight tolerances — reinforced corners, robust profiles, and hardware chosen to run smooth for decades.
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Casement windows are the purest expression of the form: a single hinged sash that swings open fully, delivering unobstructed views and maximum ventilation in the same movement. Available in left- or right-hand operation with inswing or outswing configurations to suit the layout, they adapt to nearly any architectural context without ever looking like they were forced to fit. Closed, their multi-point perimeter seal delivers the kind of energy performance that justifies the investment for decades.
Every Bellevue casement window is made to your exact opening in aluminum, aluminum-clad wood, or solid timber, then finished in the colour and texture you specify. High-performance double or triple-pane Low-E glazing, warm-edge spacers, and European multi-point hardware come as standard rather than as upgrades, so the window that arrives on site is the one you designed. Each is backed by a 10-year product warranty and 25-year glazing protection against fogging and air leakage.
Casement sashes are available from compact operable vents up to expansive single-sash units, and multiple casements can be ganged together with fixed panels for a full wall of glazing. Every unit ships with a heavy-duty crank operator and a multi-point cam lock rated for the sash size, so a large casement seals with the same pressure as a small one.
How do casement windows compare to sliding or tilt and turn? Casements seal tighter than sliding windows, because the sash presses closed against the frame rather than riding in a track. Compared with tilt and turn, casement gives you a fuller open area for airflow, while tilt and turn adds a secure vent position and inward-swing cleaning access.
Can casement windows be combined with fixed glass? Yes — casements are frequently paired with a fixed picture window in the same opening for a mix of ventilation and unbroken glass.
The craft and performance that carries through every window we make, from standard sizes to full customs.
Every sash and frame is manufactured to tight tolerances — reinforced corners, robust profiles, and hardware chosen to run smooth for decades.
Multi-chamber profiles, compression seals, and continuous weatherstripping keep drafts, moisture, and noise on the right side of the glass.
Low-E coatings, warm-edge spacers, and optional triple-pane glass bring every window up to the thermal performance your home demands.
Every window is built to your exact opening. Standard or fully custom, non-standard sizes included as standard.
Casements ship singly or in mulled rows. Specify quantity, swing direction, and operation and we'll build to spec.
Material, finish, glass, hardware, grilles: at many window companies each one is a separate upcharge. At Bellevue, every option below is included in your quote as standard. Choose what you love. We'll build it.
Three core materials, each engineered to last. Choose the one that fits your home, every one included as standard.
Wood windows offer classic charm and superior insulation. Each piece is crafted for rich character and finished to complement your home's unique style.
Aluminum windows feature slim profiles and exceptional durability. Perfect for contemporary designs, they deliver clean lines and lasting performance.
Enjoy the warmth of real wood inside and the durability of aluminum outside. This combination provides lasting protection with refined interior beauty.
Five finishing methods, each with its own character. Pair with any material above.
Enhances the natural surface of aluminum, creating a sleek metallic finish that stands up beautifully to time and the elements.
An advanced finishing method that uses an electric charge to bond paint to the surface, ensuring a consistent, high-quality appearance.
A tough, uniform finish that resists chipping and fading, available in a wide range of rich color options.
Exceptional weather resistance and color stability, ideal for long-lasting beauty in any environment.
Recreates realistic wood textures and tones on aluminum surfaces, offering warmth and character without the maintenance.
Specify based on climate, sound, or safety. These can also be combined.
A thin, invisible coating reflects heat while allowing natural light to pass through, keeping your home comfortable year-round.
Three layers of glass and insulating spacers deliver exceptional energy efficiency, sound reduction, and durability.
A protective interlayer holds the glass together on impact, reducing noise and enhancing security without compromising clarity.
Heat-treated for enhanced durability and safety. Designed to withstand stress and break into small, blunt pieces if shattered.
We work exclusively with five of Europe's leading hardware manufacturers. Choose the one that fits your home. There's no upgrade fee.
Belgian-engineered hardware with a refined balance of strength and style. Designed for modern architectural applications with smooth operation, sleek aesthetics, and outstanding corrosion resistance.
Engineered in Austria with exceptional reliability and precision locking systems. Smooth operation and long-lasting security across all window and door types.
German innovation with multi-point locking and seamless movement systems. Provides superior comfort, durability, and airtight sealing for energy-efficient designs.
Innovative solutions for comfort, security, and energy efficiency. Precision-engineered components with intelligent ventilation options.
Premium handles and fittings that unite comfort, craftsmanship, and ergonomic design. Each piece reflects precision engineering and lasting beauty.
Bronze marks the grille bar relative to the glass.
Applied to the outside surface of the glass, creating a traditional multi-pane appearance. Adds depth and dimension while remaining durable and low-maintenance.
Sealed inside the insulated glass unit for the look of divided panes without any exterior cleaning. Provides a smooth, easy-to-maintain surface and strong thermal efficiency.
Combines an internal spacer bar with external bars on both sides of the glass, achieving the aesthetic of true divided lites with enhanced realism and shadow lines.
Adheres directly to the inside or outside of the glass for flexibility in design and installation. Offers an authentic cottage or heritage-style appearance.
The thinking behind this product, in plain terms.
Three of the most common operable window styles, compared on airflow, sightlines, weather performance, and the rooms each suits best.
Product GuidesEuropean Windows Explained: Tilt-and-Turn, Hardware, and Why the US Is Catching UpTilt-and-turn operation, multi-point locking, and glazing standards that go well beyond the US baseline: what 'European windows' actually means.
Product GuidesWhat 'German-Engineered Hardware' Actually MeansMulti-point locking, precision tolerances, and decades of duty-cycle testing: what 'German-engineered' means on a window hardware spec sheet.
Pair this style with another, or browse the full collection.
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