Guides
Storefront vs curtain wall vs window wall
Storefront, curtain wall, and window wall can look similar, but they are different systems with different costs, performance, and installation needs. This guide explains the basics in plain English and shows when to [get matched](/get-matched/) with a licensed commercial glazing contractor.
What each system is meant to do
A storefront system is usually used at ground level for retail and commercial entrances. It is common in shops, restaurants, lobbies, and similar low-rise applications.
Curtain wall is a more advanced exterior wall system that hangs from the building structure. It is often used on multi-story buildings and can cover large areas of glass and metal framing.
Window wall sits between those two ideas. It is a unitized or panelized wall system that spans floor-to-floor, usually supported at each slab edge. It is common in mid-rise commercial buildings and some mixed-use projects.
- Storefront: common at street level and entrance areas
- Curtain wall: used for larger, multi-story building envelopes
- Window wall: often spans from slab to slab at each floor
How to tell them apart in plain language
Storefront is typically attached at the base of the building and is not designed like a full exterior wall for the whole structure. It is often the simplest of the three.
Curtain wall is a true building envelope system. It is engineered to resist wind, water, and movement from the structure, while staying separate from the building frame.
Window wall usually fills the edge of each floor. It can look like curtain wall from the outside, but it is supported differently and has different thermal, water, and fire-stopping considerations.
- Storefront is usually simpler and lower in height
- Curtain wall is more engineered and usually more complex
- Window wall often aligns with each floor slab
Glass and framing terms you will hear
Commercial glazing projects often use tempered, laminated, or insulated glass units, also called IGUs. Tempered glass is heat-treated to break into small pieces. Laminated glass has a plastic interlayer that helps hold the glass together. IGUs use two or more panes with a sealed space for better energy performance.
You may also hear about low-E coatings, U-factor, and SHGC. Low-E is a thin coating that helps control heat flow. U-factor describes how much heat passes through the assembly. SHGC describes how much solar heat gets through. Lower numbers can mean better insulation or less heat gain, depending on the goal.
Aluminum framing is common in all three systems. Thermal breaks are used to reduce heat transfer through the frame. That matters for comfort, energy performance, and code-related requirements.
- Tempered = stronger and safer break pattern
- Laminated = holds together better if cracked
- IGU = multiple panes sealed together for insulation
Why the right system matters for your project
The right choice depends on the building type, height, exposure to wind and weather, energy goals, and the architect’s or engineer’s design. A storefront that works well for a café entrance may not be appropriate for a tall façade.
Curtain wall and window wall usually require more coordination because they are tied closely to structure, weatherproofing, fire stopping, and building movement. Those details should be reviewed by a licensed, insured commercial glazing contractor.
If you are planning a remodel, tenant improvement, new build, or replacement, it helps to know the system before you ask for bids. A clear scope makes pricing and scheduling easier to compare. You can also review typical project ranges on our costs page.
- Higher buildings usually need more engineering and coordination
- Waterproofing and movement details are important
- A clear scope helps contractors bid more accurately
When to ask for help from a glazing contractor
If you are replacing damaged commercial glass, updating an entrance, or planning a new façade, it is smart to bring in a licensed pro early. Heavy glass, lifts, ladders, and code requirements make this skilled work.
A glazing contractor can help review system type, glass make-up, framing, access needs, and the practical sequence of work. We do not install or design the system ourselves. We help you find a contractor who can.
If you are ready to compare options, get matched with a licensed commercial glazing contractor at no cost.
- Damaged storefronts and unsafe glass railings should be reviewed promptly
- Early scope review can reduce bidding confusion
- Matching is free for the reader
Storefront is usually the simplest ground-level system, curtain wall is the most engineered, and window wall sits in between; if you need project-specific help, we can connect you with a licensed commercial glazing contractor for free.
Common questions
Is storefront the same as curtain wall?
No. Storefront is usually a simpler ground-level system, while curtain wall is an engineered exterior wall system for larger buildings. They can look similar from the outside, but they perform different jobs.
What is the main difference between curtain wall and window wall?
Curtain wall hangs from the structure and is designed as a building envelope system. Window wall typically spans floor-to-floor and is supported at each slab edge, so its details are different.
Which glass is safer for commercial buildings?
It depends on the location and use. Tempered and laminated glass are both common safety glass options, and some projects use insulated glass units with safety glass layers. A licensed glazing contractor can help review what fits the application and code needs.
Can you tell me which system I need?
We can explain the differences and connect you with a licensed commercial glazing contractor for project-specific guidance. The final system choice depends on the building, scope, and local code requirements.
How do I get pricing?
Commercial glazing is bid work, so pricing depends on the system, glass type, access, size, and location. You can use our [get matched](/get-matched/) form to share your project details and receive contractor contact matches at no cost.