Top windows are windows, which are triangular FDL, or arched FBL. They can be installed on the join above any roof window. Top windows are non-opening with U value of the pane = 1.1,Wm2K.
Original shapes, additional lighting and an interesting interior design are without doubt the advantages of these windows. Use of level raisers gives buildings a strikingly distinctive character.
Suitable for roof with pitches between 15° and 90°.
