The purpose of a curtain wall is to serve as the external cladding of a building, providing a protective and decorative outer layer that encloses the interior spaces.

Curtain walls are typically used on high-rise buildings and other large structures, as they provide a lightweight, energy-efficient, and aesthetically pleasing alternative to traditional masonry or concrete walls.

Curtain walls are designed to span multiple floors and are typically made up of thin, vertical aluminum or steel frames that hold glass, panels, or other infill materials.

They are attached to the structural frame of the building, either at the floor slab or at the top of the building, and are designed to be structurally independent from the building, so they can be easily removed or replaced without affecting the structural integrity of the building.

Curtain walls offer several benefits, including improved thermal and sound insulation, weather resistance, and design flexibility, and they can be customized with different finishes, colors, and shapes to create a unique and attractive appearance.