ABOUT OUR FLUSH CASEMENT WINDOWS

Deceuninck’s flush casement window boasts stunning aesthetics that transform both old and new properties, from modern townhouses to country cottages.

Perfectly combining efficiency with comfortable and affordable living, our flush windows not only reduce noise pollution, but are also in keeping with period properties, meaning as an installer, you can offer a unique product that meets the requirements of most conservation authorities.

• Sleek slimline frames

• U-value of between 4–1.2 W/m²K

• Superior sound insultation

• High energy rating and weather performance

• Can achieve U-values of between 1.4–1.2 W/m²K

• 600 Pa air permeability, 300 Pa water tightness, and 2000 Pa wind resistance

• Optional thermal chamber insulator for enhanced thermal performance

Vertical Sliding Windows

Transform a home with our vertical sliding sash windows, which combine the elegance of a traditional window with enhanced performance. They can be manufactured using our fully featured suite in white and foil finishes.

Whether replacing existing timber sliding sash in period buildings or adding character to any new development, they come complete with an easy clean facility for practicality as well as performance and aesthetics.

With frames from the market-leading Spectus, there is no doubt that a quality product is within grasp. Along with smooth functionality and incredible energy efficiency, our vertical sliding windows provide an enormous range of benefits.

Composite Doors

Designed to excel in areas where temperatures vary, all of our composite doors combine a tough, moulded glass reinforced plastic outer layer with an insulating core made from 100% CFC-free polyurethane.

Available in a wide range of colours, these composite doors from DoorCo can suit almost any property. Additionally, the high gauge steel reinforcing and high security modern locks can help keep homes safe without compromising on style.

We offer a comprehensive range of Korniche aluminium products, each renowned for its innovative design and superior performance:

Korniche Roof LanternsIntroduced in 2016, these lantern is known for it’s strength, outstanding thermal performance, and minimalist design, maximising natural light within any space. Updated in 2025, the New Korniche Roof Lantern is the next generation of this market-leading product.

Korniche Bifold DoorsLaunched in 2022, our bifold doors feature slim sightlines, exceptional thermal efficiency, and smooth operation, creating a seamless connection between indoor and outdoor spaces.

Sliding Patio DoorOur Sliding Patio Door, launched in November 2024, combines expansive glass panels with effortless operation, creating an elegant link to exterior areas.

Korniche Flat GlassAvailable since January 2024, our flat glass offers a sleek, contemporary aesthetic paired with excellent insulation properties.

Korniche UpstandAvailable since May 2025, the Korniche Upstand provides an ideal, integrated solution for the installation of our roof lanterns and flat glass.

Korniche FlatLiteAvailable since June 2025, FlatLite expands our flat rooflight offering with enhanced versatility and design.

Korniche Internal Glass PartitionAvailable since November 2025, the Glass Partition System is the perfect choice for room separation, delivering the perfect balance of beauty and functionality.