Storefront or curtain wall? Planning the right exterior system

Where storefront systems fit

Storefront framing is commonly used at ground-floor retail, protected entrances and interior glazed openings. It is typically economical, quick to install and well suited to relatively small openings where exposure and water management demands are limited.

Because storefront systems rely on internal drainage paths with limited pressure equalization, they should not be treated as a universal exterior wall system.

Where curtain wall fits

Curtain wall is designed for larger exterior applications and uses pressure-equalized or drained systems to manage wind-driven rain. Deeper framing and engineered anchorage help it accommodate higher loads, larger spans and multi-storey conditions.

System selection should follow the architectural intent, structural criteria, environmental exposure and manufacturer limitations—not appearance alone.

Questions for preconstruction

Early coordination between the designer, general contractor and glazing subcontractor helps confirm the basis of design before procurement.

• What are the opening sizes, spans and design pressures?
• Is the glazing protected by an overhang or exposed to weather?
• How will sill flashings and adjacent membranes connect?
• Where are anchors, embeds, blocking and perimeter seals required?
• Are thermal performance and energy-code values clearly specified?

Price the complete interface

The most useful glazing quote identifies the system, glass make-up, doors and hardware, perimeter sealants, flashings and scope exclusions. That gives the GC a clearer basis for bid comparison and reduces gaps between envelope trades.