Curtain Wall vs Structural Glazing
Curtain wall systems and structural glazing are both popular glass facade solutions for commercial buildings in India — but they are fundamentally different systems with different aesthetics, costs, and performance profiles. This guide explains the key differences to help architects and developers make the right choice.
What is a Curtain Wall System?
A curtain wall is a non-load-bearing facade system comprising aluminium framing members (mullions and transoms) with glass or opaque panel infill. The aluminium frame is visible from the exterior as a grid pattern. Curtain walls can be stick systems (assembled on-site) or unitized (factory-assembled panels).
Curtain walls excel in: high-rise applications where structural rigidity is critical; large areas requiring efficient weather-tight installation; projects requiring opaque spandrel panels integrated with glazed vision panels; and buildings where future glass replacement accessibility is important. The visible aluminium grid provides positive visual framing and can be used as an architectural design element.
What is Structural Glazing?
Structural glazing (SSG — Structural Silicone Glazing) bonds glass panels directly to an aluminium frame using high-strength structural silicone sealant, eliminating visible exterior fixings. The result is a clean, flush glass surface with no protruding frames or caps.
Structural glazing excels in: showrooms, retail facades, and hospitality buildings where maximum glass transparency and premium aesthetics are priorities; lower-rise buildings and landmark entries; projects where minimal visual interruption of the glass plane is desired; and situations where the facade must appear as a continuous reflective surface.
| Factor | Curtain Wall | Structural Glazing |
|---|---|---|
| Visible Frame | Yes (aluminium grid) | No (flush glass) |
| Typical Height | Any — 2 to 60+ storeys | Ideal up to 20 storeys |
| Cost | Rs 350–1,200/sq ft | Rs 300–900/sq ft |
| Glass Replacement | Easier (mechanical fix) | Requires sealant cutting |
| Opaque Panels | Yes (spandrels) | Opaque backing only |
| Aesthetic | Classic framed look | Seamless glass plane |
What We Offer
Frequently Asked Questions
Which is cheaper — curtain wall or structural glazing?
Structural glazing (2-side SSG) can be slightly cheaper than curtain wall for simple, low-rise facades (Rs 300-500/sq ft vs Rs 350-650/sq ft for stick system). However, 4-side SSG is comparable in cost to mid-range curtain wall. For high-rise buildings, unitized curtain wall is typically the more practical and cost-competitive solution.
Can curtain wall and structural glazing be combined on one building?
Yes — this is very common. Many buildings use structural glazing for the ground floor showroom or lobby entrance, transitioning to curtain wall for upper floors. Fine Glaze regularly designs and installs hybrid facade systems that combine both approaches within a unified aesthetic language.
Which is better for a showroom facade in India?
For showroom facades where maximum glass visibility and a premium frameless appearance is the priority, structural glazing (4-side SSG or spider glazing) is the preferred choice. The frameless glass look is a signature aesthetic for automotive showrooms, retail flagships, and luxury hotel entries.
Transform Your Building Into a
Modern Architectural Landmark
Award-winning facade solutions engineered for performance, lasting aesthetics, and measurable long-term value.