VELUX Centre Pivot Roof Window (GGL)

The VELUX Centre Pivot Roof Window (GGL) is a versatile daylight and ventilation solution designed for attic conversions, loft rooms, and upper‑storey spaces where natural light and airflow are essential. Its centre‑pivot design allows the sash to rotate smoothly around a central hinge, providing balanced, effortless operation and enabling secure ventilation at multiple opening positions.

The GGL’s centre‑pivot mechanism makes it particularly suitable for rooms with lower ceiling heights or where furniture placement may limit access to the top of the window. The design also allows the sash to rotate 180 degrees for safe and easy cleaning from inside the room, making it a practical choice for everyday use.
High‑performance glazing delivers excellent thermal insulation, solar heat control, and UV protection, helping maintain comfortable indoor temperatures throughout the year. The laminated inner pane enhances safety, while the toughened outer pane provides durability and resistance to harsh weather conditions. The timber frame, protected by exterior aluminum cladding, ensures long‑lasting performance with minimal maintenance.

Architects value the GGL for its simplicity, reliability, and ability to transform under‑utilised roof spaces into bright, functional rooms. The integrated ventilation flap allows fresh air to enter even when the window is closed, supporting passive ventilation strategies and improving indoor air quality. With its combination of daylight, airflow, and ease of use, the GGL is an ideal choice for projects seeking to enhance the comfort and usability of upper‑storey spaces.

• Roof Pitch: 15°–90°
• Operation: Centre‑pivot
• Glazing: Laminated inner pane; toughened outer pane
• Frame Material: Timber core with protective aluminium cladding
• Sizes Available: Multiple standard sizes
• Installation: Suitable for tile or custom orb metal roofing with the appropriate VELUX flashing kit
• Ventilation: Integrated ventilation flap for passive airflow