Everything You Need to Know About Aluminium Curtain Walls (2026 Guide)

Aluminium curtain walls are the non-structural exterior wall systems you see wrapped around most modern office towers and hotels. Aluminium frames hold the glass, the wall hangs off the building’s slab edge, and none of it actually carries the building’s load.

If you’re specifying one for a project, or just trying to understand what you’re being quoted, this guide walks through the types, the real cost ranges, upkeep, and how to avoid a bad supplier.

Quick Summary:

What Are Aluminium Curtain Walls?

An aluminium curtain wall is an exterior skin built from aluminium mullions and transoms, holding glass or panel infill in a grid. It only has to carry its own weight and whatever wind pushes against it. The floors and columns behind it do the actual structural work.

That’s really the whole idea. Seal the building off from the weather without adding a heavy, load-bearing wall behind the glass. You’ll spot these on office towers, hotels, airports, and lately on villas and showrooms chasing a fully glazed look.

Types of Aluminium Curtain Walls

Three system types cover almost every project out there, and picking between them usually comes down to height, budget, and how fast you need to build.

1. Stick System

A stick system goes together on site, one mullion and transom at a time. It’s cheaper up front and it’s the go-to for low to mid-rise buildings where there’s time and labour to spare on site.

2. Unitized System

Here the panels arrive pre-glazed and fully assembled from the factory. Crews just lift and hang them. 

It costs more per unit, but the install is faster and quality control happens indoors, not forty floors up in the wind. This is why most high-rises use it.

3. Semi-Unitized System

This one splits the difference. Some parts come pre-built, others get assembled on site. Mid-rise projects often land here, wanting better consistency than a stick system without paying full unitized prices.

Why Aluminium Is the Material of Choice for Curtain Walls

Aluminium is light, it resists corrosion on its own, and it extrudes into precise, thin profiles that steel can’t easily match. Steel is stronger pound for pound, sure, but it’s heavier and needs constant upkeep to stop it rusting. Not something you want to gamble on forty storeys up.

It also recycles fully, which helps on green building scorecards. Pair it with a thermal break and the insulation gap with heavier materials closes right up.

Key Benefits of Aluminium Curtain Walls

A few reasons this material keeps winning over the alternatives:

1. Lightweight structure takes real load off the building frame and foundation
2. Corrosion resistance holds up in coastal air, humidity, and industrial pollution
3. Design flexibility means large glass spans, curves, slimmer sightlines are possible
4. Energy performance improves a lot once you add a thermally broken profile
5. Low maintenance comes from powder-coated or anodised finishes that last decades outdoors
6. Faster builds happen when unitized panels ship ready to hang

Aluminium Curtain Walls Cost in 2026

Expect somewhere between $25 and $150+ per square foot installed. Or about $180 to $500+ per square metre. That’s a wide bracket, and glazing type, frame depth, finish, and facade complexity are what actually move the number.

A rough breakdown of what drives the price up or down:

One thing worth double-checking

Does the quote cover panels only, or the whole installed system? A cheaper number often just means less is included, not a better deal.

Aluminium Curtain Walls vs Traditional Windows

These two solve different problems, so comparing them on price alone misses the point. Here’s where they actually differ:

How to Care for Aluminium Curtain Walls

Aluminium curtain walls need very little upkeep, but a bit of routine care is what gets you the full 40-plus year lifespan out of the system.

1. Clean the Glass and Frames Regularly

Wash aluminium curtain walls at least twice a year with mild soap and water, more often near the coast or in industrial areas

2. Keep Drainage Channels Clear

A quick check every few months, clearing out dust, leaves, or insect nests, stops water damage before it starts.

3. Inspect Gaskets and Sealants

Look for cracking or shrinkage every one to two years. And get worn sealant replaced before it lets water in behind the glass.

4. Schedule a Professional Inspection Every Few Years

A trained team can catch anchor movement, sealant failure, or thermal break degradation long before it becomes a leak or a safety issue.

Industry Standards and Certifications to Check

Test reports matter more than marketing claims here. Before signing off on any curtain wall system, check it’s actually been tested against recognised standards.

1. ASTM covers structural, air, and water infiltration test methods
2. AAMA certifies curtain wall and fenestration performance
3. NFRC rates energy performance for U-factor and solar heat gain
4. FGIA sets combined fenestration and glazing industry standards

A supplier who hands you test reports against these standards, rather than just a glossy brochure, is one worth taking seriously.

How to Choose the Right Aluminium Curtain Walls Supplier

In practice, the real risk on curtain wall projects is usually the supplier relationship, not the alloy grade. Check these checking before you commit.

1. Factory ownership. Does the supplier actually manufacture, or resell someone else’s production?
2. Engineering support. Can they provide shop drawings and structural calculations for your climate zone?
3. Certification matching. Do their test reports cover the wind, seismic, thermal codes your country requires?
4. Sample transparency. Will they send physical profile and glass samples before production starts?

Why Choose Starveil for Your Aluminium Curtain Wall Project

Starveil builds aluminium curtain walls, windows, and doors out of our own 45,000 m² factory in Foshan, China. One design and production team stays on your project from the first enquiry through installation, so nothing gets lost in a handoff between departments.

What that looks like in practice:

1. 28 years of factory-direct manufacturing, with 1,500+ completed projects across 118 countries
2. Free engineering support, shop drawings, 3D renderings before you commit to an order
3. Certifications matched to your region, including NFRC, CSA, CE Marking, and AS2047
4. On-site and remote installation guidance from our own engineers

Need a facade partner who designs, builds, and ships from one factory? View our curtain wall systems or get in touch with our team for a free quote.

Get a Free Quote for Your Aluminium Curtain Wall Project

Getting an aluminium curtain wall right means matching the system type, cost, and certifications to your project, then keeping up with the care it needs afterward. 

Starveil designs, manufactures, and installs curtain wall systems from our Foshan factory, with engineering support built in from your first enquiry. Request your free quote today, and we’ll get back to you within 24 hours.

FAQs

What are aluminum curtain walls?

Aluminum curtain walls are non-structural exterior facade systems built from aluminium frames holding glass or metal infill panels.

How much does aluminum curtain wall cost per square foot?

Expect somewhere between $25 and $150+ per square foot installed, depending on glazing type, frame depth, finish, and building height.

What material is used for curtain walls?

Aluminium is the standard frame material for curtain walls. It’s chosen for its light weight, corrosion resistance, and recyclability. Glass or metal spandrel fill in the grid the aluminium frame creates.

What are the two types of curtain walls?

The two types are stick systems (assembled on site, piece by piece) and unitized systems (factory-built panels, lifted and hung on site). Stick is cheaper and slower; unitized costs more but installs faster with tighter quality control.