A Complete Guide for Architects, Fabricators, and Contractors
If you’ve ever looked up at a glass-clad office tower and wondered how the exterior was assembled piece by piece on site, chances are you were looking at a stick curtain wall system. Stick curtain walls remain one of the most widely used facade systems in commercial construction because they are field-assembled, cost-effective, and adaptable to complex building geometries.
In this guide, we’ll break down what a stick curtain wall is, how it compares to unitized systems, its advantages and limitations, and why accurate drafting and engineering are critical to getting it right the first time.
What Is a Stick Curtain Wall?
A stick curtain wall is a non-structural, non-load-bearing exterior wall system that is assembled component by component directly on the building site. Unlike unitized systems, which arrive as pre-glazed, factory-built panels, a stick curtain wall is built from individual “sticks” — vertical mullions and horizontal transoms — that are installed piece by piece, with glass or panel infill added afterward.
Because the framing members are installed one at a time, stick curtain walls offer greater flexibility for irregular facades, tight urban sites, and projects where transporting large pre-assembled panels isn’t practical.
Key Components of a Stick Curtain Wall System
A typical stick curtain wall consists of:
- Mullions – vertical structural members that anchor the system to the building frame
- Transoms – horizontal members that connect mullions and support glazing
- Anchors and brackets – connect the curtain wall frame to the building’s structural slab or steel
- Glazing infill – glass, aluminum panels, stone, or terracotta units set into the frame
- Gaskets and sealants – provide weatherproofing, thermal performance, and air/water barriers
- Pressure plates and caps – secure glazing in place and create the finished exterior reveal
Each of these components must be precisely detailed and coordinated, which is where accurate shop drawings become essential to avoid field errors and costly rework.
Stick vs. Unitized Curtain Wall: What’s the Difference?
| Factor | Stick Curtain Wall | Unitized Curtain Wall |
|---|---|---|
| Assembly location | On-site, piece by piece | Factory-assembled panels |
| Installation speed | Slower, labor-intensive | Faster once panels arrive |
| Upfront cost | Generally lower | Generally higher |
| Design flexibility | High, easier to adapt in field | Lower, fixed at fabrication |
| Weather exposure during install | Higher | Lower |
| Quality control | Field-dependent | Factory-controlled |
Stick systems are often preferred for low- to mid-rise buildings, renovation projects, and facades with irregular geometry, while unitized systems are common on high-rise towers where speed and factory quality control matter more.
Advantages of Stick Curtain Wall Systems
Lower material and shipping costs. Individual mullions and transoms ship more compactly than pre-glazed panels, reducing freight costs.
Design adaptability. Field assembly allows adjustments for as-built conditions, making stick systems a strong fit for renovations and additions where existing structures rarely match drawings exactly.
Simplified logistics on tight sites. Urban projects with limited crane access or staging space often favor stick systems because components are smaller and easier to maneuver.
Easier repairs and replacements. Because units are installed individually, damaged glazing or framing can often be replaced without disturbing adjacent bays.
Limitations to Consider
Stick curtain walls do come with trade-offs. On-site assembly takes longer and is more labor-intensive than installing pre-built unitized panels, and quality is more dependent on field conditions and installer skill. Weather exposure during installation can also affect scheduling and quality control. These risks are best managed through detailed, coordinated fabrication drawings and clear installation sequencing prepared before work begins on site.
Why Accurate Drawings Matter for Stick Curtain Wall Projects
Because stick systems are assembled from many individual components in the field, even small dimensional errors can compound into major issues — misaligned mullions, water infiltration, or clashes with structural steel and MEP systems. Getting the drafting and engineering right before fabrication begins is what separates a smooth installation from a costly change order.
This is where a few disciplines become critical:
- Shop drawings — Detailed fabrication-ready drawings that translate architectural intent into buildable mullion and transom layouts, anchor details, and glazing schedules.
- BIM drawings — 3D coordination that catches clashes between the curtain wall system and structural or MEP elements before they become field problems.
- Fabrication and die drawings — Precise extrusion and component-level drawings that ensure mullions, transoms, and pressure plates are manufactured to exact tolerances.
- Engineering services — Structural calculations and connection design that confirm the system can handle wind loads, thermal movement, and seismic requirements for the project’s location.
How CJ Facade Supports Stick Curtain Wall Projects
CJ Facade works with architects, glazing contractors, and fabricators across all US states to produce accurate, code-compliant shop drawings, BIM models, fabrication drawings, and engineering packages for stick curtain wall systems. From initial concept coordination through fabrication-ready documentation, our team focuses on precision that reduces field errors, minimizes RFIs, and keeps installation on schedule.
Whether you’re detailing a low-rise commercial facade, a renovation retrofit, or a complex geometric curtain wall, our drafting and engineering team can help turn architectural intent into buildable, accurate documentation.
Frequently Asked Questions
Is a stick curtain wall cheaper than a unitized system? Generally, yes — stick systems typically have lower material and shipping costs, though installation labor costs can offset some of that savings depending on project size and site conditions.
Can stick curtain walls be used on high-rise buildings? Yes, though unitized systems are more common on tall towers due to faster installation and factory quality control. Stick systems are more frequently used on low- to mid-rise buildings.
What causes most problems in stick curtain wall installations? Field assembly errors, inaccurate shop drawings, and poor coordination with structural and MEP systems are the most common sources of issues — all of which can be minimized with detailed drafting and BIM coordination before fabrication begins.
Ready to Start Your Stick Curtain Wall Project?
Accurate shop drawings and engineering documentation are the foundation of a successful curtain wall installation. Contact CJ Facade today to discuss your project requirements and get precise, fabrication-ready drawings for your next stick curtain wall system.
