A curtain wall is a lightweight, non-load-bearing exterior wall that protects the building while transferring wind and self-weight back to the structure. It can be predominantly glazed or combine transparent glass, spandrel zones, panels, fins, and opening elements.
Core components
Typical systems include aluminum mullions and transoms, pressure plates or structural silicone, insulating glass, gaskets, anchors, flashings, and internal drainage paths. These components must work together to resist air, water, wind, temperature change, and building movement.
How water is managed
Curtain walls are designed around controlled drainage rather than a single exposed seal. Pressure-equalized cavities, weep paths, compartment seals, and properly detailed interfaces guide incidental water back to the exterior.
Why coordination matters
The facade connects structure, waterproofing, interiors, roofing, and building services. Early agreement on grid, anchors, tolerances, fire stopping, access, and testing is essential for a reliable and buildable system.
