Highly energy- efficient center pivot Windows 


TT U8 Thermo* with coefficient Uw=0.58W/m2K (equivalent R-Value 9.8)
FTT U6 – with coefficient Uw=0.8W/m2K (equivalent R-Value 7.1)

* test result for the whole roof window (FTT U8 Thermo) with EHV-AT Thermo flashing testing compliant with EN ISO 12567-2, equivalent R-Value 9.8

  • Exceptional roof windows intended for energy-efficient and passive construction.
  • The glazing unit is set in a particularly designed sash frame. It has wider wooden profiles, compared with a standard window. This design reduces the occurrence of thermal bridges and delivers better insulation of the window. FTT Thermo U8 window with a heat transfer coefficient of Uw = 0.58 W/m2K (equivalent R-Value 9.8) is the warmest roof window on the market with single glazing unit.
  • Supplied and installed complete with flashing EHV-AT Thermo. As standard, it is also equipped with a set of insulation flashings XDK containing an insulation set XDP and air-tight flashing XDS.Windows opened via pivot with hinges located above the window mid height, thanks to which even the tallest person in your family can comfortably stand upright by the open window. Special window structure utilizing wider sash frames and quadruple sealing system.
  • Easy cleaning the external glass and fastening awning blind thanks to a special bolt which blocks the sash when rotated up to 180°.
  • Increased burglary-resistance – topSafe system.

FTT U8 Thermo - window of the future

The FTT window with innovative structure ensures excellent thermal insulation performance and large energy savings.
The FTT U8 Thermo window featuring Uw = 0.58 W/m2K (equivalent R-Value 9.8) is the most energy-efficient roof window with a single glazing unit available on the market. It significantly exceeds the energyefficiency requirements for roof windows which will become effective from 2021. The FTT U8 Thermo complies with passive construction requirements, which is confirmed by Passive House certificate.

Application of comprehensive solution ensures fulfilling energy-efficient function of the window and allows to reduce heat loss as well as bills for heating the building.



Glazing unit U6 highly energy efficient glazing unit U6

Suitable for pitches from 15-70 suitable for roof pitches 15 to 70 degrees


FTT U8 Thermo

Glazing unit U8 passive U8 glazing unit

Flashing EHV-AT Thermo the most efficient roof window available on the market. Supplied and installed with flashing EHV-AT Thermo

Suitable for pitches from 15-70 suitable for roof pitches 15 to 70 degrees

Flashing XDP insulation flashings XDK consisting of insulation set XDP and air-tight flashing XDS

FTT Thermo available sizes

Size22 x 3830 x 4630 x 55
Outside framein.21½ x 38⅝30¼ x 46½30¼ x 55
Rough openingin.22½ x 39½32¼ x 4832¼ x 56½


FAKRO manufactures a range of roof windows that transform attics into comfortable living spaces. The main difference between a roof window and a skylight is that a roof window opens like a regular window on side hinges or pivoting at the center or top. Roof windows operate manually with the turn of a handle and are also available in electrical versions.


All FAKRO products encircled by the requirements of European harmonized standards are marked with CE sign. Declared parameters are confirmed by independent notified laboratories. Additional confirmation of high quality manufactured products is possession of more than 20 prestigious certificates within which regular, external control audits take place.

  • American National Standards Institute
  • Quality Auditing Institute
  • Energy Star
  • Insulating Glass Manufacturers Aliance
fakro skylight

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