Curtain Walls vs Storefronts — Which System Suits Your Project?

When planning a glazed façade or aluminum-and-glass installation you will often choose between two primary systems: the curtain wall and the storefront. Both can deliver a modern glazed appearance, but they differ substantially in performance, technology, cost and suitability. This article explains the differences, strengths and weaknesses of each system and when to choose one over the other.

When evaluating facade solutions for commercial buildings, the choice between Curtain Wall vs Storefront depends on factors such as building height, structural requirements, and intended use. Each system offers distinct advantages, making it important to understand their differences before selecting the most suitable option.

What is a Storefront?

A storefront is a non-load-bearing aluminum and glass framing system typically used at low heights—most commonly for ground-floor shopfronts, entrances, display windows and small lobbies.

Key advantages

• Slim, simple frames that create a clean, contemporary look.

• Large glass areas for product display and visual access.

• Lower material and installation costs and faster installation.

• Flexible: easily integrates doors and display glazing.

Limitations

• Height is limited (commonly up to about 3–4 m per opening).

• Thermal and weather performance is modest compared with heavier systems.

• Drainage strategy usually relies on sill-level weep systems (less robust for harsh climates).

• Not intended for multi-story façades or high-rise applications.

What is a Curtain Wall?

A curtain wall is a non-structural façade attached to the building’s structural frame. It is designed for multi-story applications and can span entire building heights.

Key advantages

• Can cover multiple floors and high-rise buildings.

• Superior thermal performance using IGUs (insulated glass units), thermal breaks and advanced glazing options.

• Independent drainage and pressure equalization systems reduce leakage risk.

• Premium, seamless glazing aesthetic suitable for prestige buildings.

• Durable and engineered for long-term performance.

Limitations

• Higher initial cost (glass, mullions, structural attachments, specialist labor).

• More complex installation and longer programmed; requires experienced façade contractors.

• Maintenance and repair can be more involved and costly.
  

Curtain Wall vs Storefront System Comparison

Criterion	Storefront	Curtain Wall
Typical use	Ground floor / low height	Multi-story / high rise
Frame depth	Slim	Deeper mullions and transoms
Glazing	Single or simple IGU	Multi-layer IGU, high-performance glazing
Thermal & weather performance	Moderate	High
Cost	Lower	Higher
Installation complexity	Simpler, faster	Complex, slower
Aesthetic	Clean, functional	Seamless, premium

When to choose which

Choose Storefront if:

• The application is ground-floor retail, a low-rise entrance, or a small lobby.

• Budget and speed of installation are priorities.

• You need large transparent display areas without multi-story spans.

Choose Curtain Wall if:

• The building is multi-story or high-rise.

• You require high thermal performance, water resistance and long-term durability.

• The project seeks a continuous glass façade and premium architectural appearance.

Final note

There is no universally “better” choice; the right system depends on building use, budget, energy and weather performance requirements, and desired architectural outcome. For aluminum façade specialists, understanding both systems allows you to recommend the optimal solution—balancing cost, performance and aesthetics—to each client.