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Understanding the difference between aluminum curtain wall and window wall systems<\/strong> is essential for facade specification. While both are aluminum-framed glazing systems, they differ fundamentally in how loads are transferred and where they can be used in a building.<\/p>\n\n
In simple terms: a curtain wall<\/strong> is a non-structural facade that hangs off the building structure and spans between floors. A window wall<\/strong> fits between structural slabs and transfers its load directly to each floor. This distinction affects design flexibility, cost, and application range.<\/p>\n\n
The curtain wall is supported by the building structure at each floor level through anchors and brackets. It is designed to resist wind loads and transfer them to the structure, while carrying its own weight. Curtain walls can span continuously across multiple floors. Runheng RS and TWY series louver systems and curtain wall systems are designed for these applications.<\/p>\n\n
A window wall fits entirely between two floor slabs. Each unit is supported by the slab below and capped by the slab above. Window walls cannot span across floors \u2014 each floor has its own independent window wall system.<\/p>\n\n
Curtain wall:<\/strong> Can span multiple floors vertically. Ideal for tall atriums, lobbies, and uninterrupted glazing runs.<\/p>\n
Window wall:<\/strong> Limited to single-floor height. Each unit sits between two slabs.<\/p>\n\n
Curtain wall:<\/strong> Installed after the building structure is complete, from the outside using cranes or mast climbers.<\/p>\n
Window wall:<\/strong> Can be installed floor-by-floor as the building rises, often from the inside before the next slab is poured.<\/p>\n\n
Curtain wall:<\/strong> Higher initial cost due to more complex framing, anchors, and installation equipment.<\/p>\n
Window wall:<\/strong> Generally more economical, especially for repetitive floor plates.<\/p>\n\n
Curtain wall:<\/strong> Greater design freedom \u2014 can create continuous glass facades, complex geometries, and custom sightlines.<\/p>\n
Window wall:<\/strong> More constrained \u2014 the slab edge is always visible, creating a horizontal banding effect on the facade.<\/p>\n\n
Choose curtain wall for:<\/strong> High-rise towers, landmark buildings, airport terminals, convention centers, buildings with uninterrupted glazing requirements, projects with complex facade geometries.<\/p>\n\n
Choose window wall for:<\/strong> Mid-rise residential and commercial buildings, hotels with repetitive floor plans, projects where floor-by-floor construction sequencing is important, cost-sensitive applications.<\/p>\n\n
Runheng fabricates both curtain wall louvers and window wall systems for international projects. Our experience includes Hong Kong International Airport, Hospital Authority buildings, and luxury hotel developments. View our project portfolio<\/a> or contact us<\/a> for technical assistance with your facade system specification.<\/p>\n”