The Ferroline system is particularly recommended for use in the renovation of historic buildings. The appearance of the profiles is a perfect imitation of steel joinery, and their construction is characterised by very good technical parameters. The system can be used to manufacture all types of inward-opening windows (casement, tilt and tilt-and-turn windows), outward-opening windows and fixed windows, which in addition to excellent thermal insulation are also characterised by very good acoustic insulation and water and air tightness.

The profiles are available in various variants. The renovation frames available in the system allow new joinery to be installed without removing the old frames, thus eliminating the risk of potential damage to the wall around the windows. The visible width of the aluminium profiles is designed so as not to create major differences in appearance between old and new windows.