A NEW DIMENSION OF LIGHT IN FLAT ROOFS

Flat roof windows are used in modern residential buildings to bring daylight into rooms located directly beneath a flat roof structure. This solution was also implemented in a single-family house in Denmark.

Daylight and Everyday Comfort

Two FAKRO flat roof windows were installed in the building. The first is a DXG P2 non-opening window measuring 100 × 150 cm, designed to provide natural daylight to the interior. The second is a DEG P2 Z-Wave electrically operated window measuring 120 × 220 cm.

The DEG window can be controlled using a remote control or a wall switch. An integrated actuator enables smooth opening and closing of the sash, which can be opened up to 12 cm, supporting natural air exchange within the room. The window is also equipped with a rain sensor that automatically closes the sash when precipitation is detected.

Thanks to the design of the sash and frame profiles, FAKRO flat roof windows offer up to 16% more glazing area compared with selected solutions available on the market. The larger glass surface allows more daylight to enter the interior.

Thermal Performance and Safety

Both DEG and DXG windows are made of multi-chamber PVC profiles filled with thermal insulation material. The whole-window heat transfer coefficient is Uw = 0.92 W/m²K, helping to reduce heat loss through the building envelope.

Both models feature the P2 glazing unit, incorporating an internal laminated pane rated P2A, which enhances user safety in the event of glass breakage. On the exterior, the windows are protected by an additional toughened glass top pane.

Application in the Project

One of the windows was installed above the open-plan living area, providing daylight from above. The second was fitted in a corridor, a part of the house that, due to its location, has limited access to natural light.

In this project, the use of flat roof windows helped introduce daylight into selected areas of the home while supporting the functionality and comfort of the interior spaces.