Identifying your roof window
Choose your data plate layout
Enter your data plate information
Locate the data plate on your roof window
Refer to the typesign of your window, as seen below. All VELUX roof windows produced after 1968 have a type sign stating exact information about the window located in the corner of the top sash behind the ventilation flap.
Locate the silver colored sign on the left hand side of your window when the window is open.
Locate the grey colored sign on the right hand side of your window, visible when the window is open.