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Urban Redevelopment Authority (URA)

Curtain Wall

Find out the GFA treatment for curtain walls

Last updated 6 June 2026
Cross-section diagram with labels: mullion, glass, floor slab. Indicates Gross Floor Area (GFA) is measured to half the glass thickness.

Curtain Wall (Section)

Diagram showing the cross-section of a curved glass surface.

Curtain Wall (Plan View)