What is a common characteristic of curtain walls?

A common characteristic of curtain walls is their lightweight design. Curtain walls are typically non-structural cladding systems that are attached to the structural frame of a building. They often utilize materials like aluminum frames and glass panels, which contribute to a reduced weight compared to traditional heavy construction methods such as masonry or concrete. This lightweight nature allows for greater flexibility in building design and a reduction in the load on the building’s structural elements. The use of lightweight materials also facilitates easier installation and can lead to cost savings in both material and labor.

Other options do not accurately describe the characteristics of curtain walls. Heavy concrete construction contradicts the essence of curtain wall design, which emphasizes a lighter approach. Single-pane installation is less common because many curtain walls utilize double or triple glazing for better thermal efficiency and sound insulation. Additionally, while glass may be a predominant material in curtain walls, limiting them to exclusively glass ignores the use of other materials such as metal framing, which is integral to their structural integrity and performance.