SlimLine 38 is an inward opening window system with good thermal insulation. It combines elegance, comfort and unique design. Thanks to a slim profile, SL38 windows are often used to replace old steel windows without affecting the original design of the building. The thermal properties of such windows are many times higher than old steel windows.

The system is available in three versions:
– SlimLine 38 Classic;
– SlimLine 38 Cubic;
– SlimLine 38 Ferro.

The system also allows you to combine frames and sashes between its subsystems, which gives even more options for the design of aluminium windows.