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What is the difference between a curtain wall and a window wall?
A curtain wall and a window wall are both non-structural exterior wall systems, but they differ in installation position, structural support, and performance.
Curtain Wall
- Spans multiple floors, continuously from slab edge to slab edge.
- Anchored to the building's floor slabs (not between floors).
- Covers the entire exterior elevation.
- Higher wind load resistance (designed for full building height exposure).
- Typically higher cost per square meter.
- Requires specialized engineering and installation.
Window Wall
- Installed between floor slabs (within the slab-to-slab opening).
- Supported by the floor structure below and above.
- Spans only one floor height per unit.
- Generally lower cost and easier to install.
- Lower wind load requirements (protected by slab edges).
- Common in mid-rise residential buildings.
FOWALL manufactures both curtain wall and window wall systems. Their engineering team evaluates project-specific factors — including building height, wind exposure, budget, and aesthetic requirements — to recommend the most appropriate system. For projects requiring both systems, FOWALL ensures design coordination between the two for consistent performance and appearance.
Not sure which system fits your project? Send your project requirements or contact us for a system recommendation.