Curtain walling is attached onto the side of the building which is designed to enhance the luminosity of the structure it encapsulates allowing more sunlight to beam through.
Because it is not part of the building’s actual structure it can be made of lighter materials which in turn significantly reduces the overall construction costs.
It is designed in a way that makes it resistant to whatever the elements may throw at it, whether this might be from heavy rain storms or gale force winds it maintains fixed serving its purpose.