Usytuowanie okien na dachu

Choosing the roof window

Window Installation Height

In homes where levels are below 25 meters above the ground, the distance from the bottom edge of the opening window to the floor should be at least 0.85 Meters. In buildings where storeys are more than 25 Meters above the ground level the aforementioned distance should be not less than 1.1 meter. It needs to be noted that the higher the window is fitted, the more light enters the room, hence Fakro roof windows are equipped with a bottom handle opening system to allow opening of the windows to optimum height. The bottom end of the Fakro roof window should preferably be situated at 1.1 – 1.4 meters above the floor level. The recommended distance is 1.2meters (bearing in mind that the average room height is 2.5 meters, which provides a significant amount of light into the room and also provides unrestricted views.

Wysokość montażu okna dachowego




Installation of the window at this height will allow the fixing of a standard radiator below the wondow and also allows proper lining construction. Due to this proper air circulation along the window glazing reduces the risk of condensation appearing on the window.



Usytuowanie okna w dachu

The window placement

When electing how and where to locate your roof window, you can consider the option to use a number of smaller windows located in different positions of the roof, rather than one lager window, as it will provide far greater light into the room.


The Right Windows

The selection of roof windows depends on the following:

  • The glazed area and type of room
  • The right amount of natural light in a room is decided by the size the surface of the window’s glass area to the total floor area. In reference to habitable rooms this proportion should be at least 1:8, and in other rooms where natural light is needed because of their function – at least 1:12
  • The pitch of the roof needs to be considered
  • The location selected for the window also depends on the roof pitch
  • The lower the roof pitch the higher up the roof the window needs to be


Installation on Rafters


Montaż na krokwiach

Installation Brackets


Montaż na łatach


  • Fakro roof windows are equiped with universal brackets, which will allow installation with on trimmers or on the rafters. Installation of the window at a chosen depth, means that the milled groove marked with N, V, J letters is level with the top surface batterns.
  • We install install windows on rafters when the window width matches the spacing between the rafters, it ensures stability of the construction and durability of the connection. Installation on the rafters is recommended especially when you replace old windows (in already existing roofs) with new ones or when you install large windows.
  • The roof window is installed on trimmers, you can move the window horizontally to better adjust the place on instalation to the roof material profile.


Installation Brackets


Montaż na łatach
Installation on Rafters


Montaż na krokwiach
Installation on Trimmers


Montaż na wymianach