Combination Window

What Makes a Combination Window the Right Choice

Some wall openings are too large or architecturally complex for a single window type to address well. A fixed panel alone blocks ventilation. An openable unit alone limits the glass area. A combination window solves this by integrating both into one frame. The upvc fixed windows panel maximises light and view, while the operable section, whether a slider or casement window, handles ventilation. For any windows design for home where the opening demands both functions without compromise, upvc windows built as a combination system are the most practical solution.

Combination Window Patterns That Work for Your Space

Griham's combination window range offers four configurations, each built around a specific functional logic.

Sliding Window With Top Fixed 
Combines a lower sliding section for everyday ventilation with an upper fixed glass panel that allows additional natural light into the room. This uPVC window design is suitable for taller wall openings, extending the glazed area upwards while keeping the sliding section at a convenient height for easy operation. 

Casement Window With Top Fixed 
Combines a lower uPVC casement window that opens inward or outward for maximum ventilation with a fixed glass panel above that allows additional natural light into the room. This design brings together full-opening ventilation and extra daylight while enhancing the window's overall appearance. 

Slider With Top & Bottom Fixed 
Combines a central sliding window with fixed glass panels above and below, allowing ventilation while bringing in natural light and providing clear views. Designed for tall, floor-to-ceiling openings, it keeps the sliding section at a comfortable height for easy operation, while the fixed panels extend the glass area without requiring additional openable sections. 

Sliding Window With Bottom Fixed 
Combines an upper sliding section for easy ventilation with a fixed glass panel below that allows natural light into the room while providing added safety. This uPVC window design is particularly suitable for high-rise bedrooms and living rooms, where ventilation, clear views and protection are important.

Where Combination Windows Work Best

The combination window is the right answer for openings that a single window type cannot serve completely. As windows for home go, it performs best where the wall area is large, the architectural intent is considered, and both light and ventilation are non-negotiable.

On commercial facades, the benefit is visual continuity; the fixed panel creates an unbroken glass line while the operable unit manages ventilation independently. For staircases and landing walls, maximising light through a fixed panel while a smaller operable section handles airflow is the best window design logic. In compact rooms where the ceiling is higher than standard, a combination frame fills the opening proportionally without making the window feel oversized. For any windows design for home that treats light and ventilation as equally important, the combination window offers an effective way to achieve both. n

Glass and Finish Options for Your Combination Window

The glass specification for a combination window deserves as much attention as the frame configuration. Because the fixed panel carries a larger glass area than most standard windows, the upvc window glass types chosen, directly influence how much heat, noise, and light the window manages.

For better thermal comfort and noise reduction, double glazed windows, with two glass panes separated by an insulating air gap, are the most effective choice for larger fixed glass panels. Toughened glass suits high-rise and large-format applications, while reflective and tinted options manage solar heat and glare. 
For the profile’s surface finish, DecoShield technology brings wood grains, stone textures, and designer patterns to the frame, ensuring the upvc window design integrates with the interior and exterior aesthetic.