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Flat roof windows Type F | FAKRO
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Flat roof windows Type F | FAKRO

  • Applications

    Residential, green roofs
  • Characteristics

    includes thermal insulation, suitable for roof pitches between 2° and 15°, glazing unit DU6, 0.5 W/m²K, glazing unit DU8, 0.3 W/m²K
  • Sizes

    60x60 cm, 60x90 cm, 70x70 cm, 80x80 cm, 90x90 cm, 90x120 cm, 100x100 cm, 100x150 cm, 120x120 cm, 140x140 cm, 120x220 cm
  • Certification

    Red Dot Design Award 2016
  • Guarantee

    10 years for windows, 2 years for control elements in electric versions

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More about this product

Modern architecture and changing technology in the construction industry allow the erection of houses with flat roofs. Each room in the building should offer a source of natural light to make the user feel comfortable. FAKRO's Type F flat roof windows are an ideal solution in such cases.

The type F flat roof window features a sleek modern look, characterized by excellent thermal insulation parameters. The structure of the frame is the same as for flat roof windows with a dome (type C) however the main difference lies in the glazing unit which is bonded using modern manufacturing technologies to produce an innovative design.


  • DEF - electrically opened
  • DMF - manually opened
  • DXF - non-opening

D_F Window - Colourline version

The innovative flat roof window D_F ColourLine allows you to match the color of the window finish with the existing roof design. A wide range of colors in accordance with the RAL Classic Palette.

Glazing units

Type F is equipped with an energy-efficient, triple DU6 glazing unit. The external glass 6mm thick is toughened while the internal glass is laminated and anti-burglary P2A class. Should the pane crack, shards of glass do not pose a danger but remain on the laminate film. Heat transmittance coefficient for the whole window is U=0.70 W/m²K.

The window is also available to order with a quadruple U8 glazing unit. Heat transmittance co-efficient for the whole D_F DU8 window is U=0.64 W/m²K. Such excellent parameters make the window suitable for use in energy-efficient and passive buildings.

Sound insulation

The DEF flat roof window with a double-chamber DU6 glazing unit has been tested for sound insulation during heavy rain. The result obtained, LIA= 36 dB confirms the high level of resistance against sound penetration, therefore the window is ideal for places where peace and silence are welcome.


The structure of the window enables the installation of internal as well as external accessories. The external awning blind protects against room overheating while internal accessories protect from intensive sunlight and provide a decorative element.

Installation details

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