Window DEF – the ideal choice for illuminating the interior under a flat roof

The DEF flat roof window is now available in the ColourLine version! It allows for color matching of the window with the style of the existing roof. A wide range of colors is identical to the RAL Classic palette.

The innovative DEF flat roof window brightens the spaces under the flat roof with natural light. It excels with very good thermal insulation parameters – thermal transmittance U=0.76 W/m2K* and modern appearance.

The glazing created using glass bonding technology guarantees high durability and an aesthetically pleasing appearance. Due to the special shapes of the profiles, the flat roof window features up to 16% larger glazing area compared to solutions offered by competitors.
The window can be manufactured in any size ranging from 60x60 – 120x220 cm. The option to produce the window in non-standard dimensions allows for easy replacement of existing skylights and improvement of the thermal insulation parameters of the entire building. DEF is equipped with energy-efficient glazing, making it suitable for passive buildings.

The window is operated in a wireless Z-Wave system and is equipped with a rain sensor that triggers the window closing function during the first raindrops.

This is a window with electric control managed by a wireless Z-Wave system, equipped with a rain sensor that automatically triggers the closing function of the open sash during the first raindrops.

*for D_F DU8 windows according to EN 12567-2