The curtain wall is a central element of modern high-rise architecture. As a suspended, non-load-bearing envelope system, it serves exclusively as the building's skin: weather and wind protection, thermal insulation, sound insulation, and daylighting. Typically the system consists of an aluminum profile grid into which glass panels or composite elements are inserted. The construction is attached to the building's primary structure but can move independently to accommodate thermal expansion. Modern curtain wall systems frequently integrate solar-control glazing, photovoltaic elements, and natural ventilation openings. The aesthetic impact of these transparent envelopes significantly defines the appearance of contemporary office and administrative buildings worldwide.