Unitized vs Stick System Curtain Wall: Which is Better?

The Decision That Shapes Your Entire Facade Project

Unitized vs stick system is the first and most consequential decision in curtain wall specification. Get it right and your project runs smoother, your facade lasts longer, and your client is happier. Get it wrong and you're either overspending by 30% or installing a stick system on a 25-storey building that will leak by year 5.

How Each System Actually Works

Stick system: aluminium mullions and transoms are assembled piece-by-piece on site, then glazed. Every joint is sealed on site in whatever weather shows up. Unitized system: complete floor-to-ceiling panels — glass, frame, seals, all in — are assembled in a factory under controlled conditions, then hoisted and clicked onto building anchors. One panel, one mechanical connection, done.

Head-to-Head Comparison

How the two systems compare across key parameters:

The Real Reason Unitized Costs More

What the extra cost actually buys you:

• 1.Factory-sealed EPDM gaskets compressed uniformly — not dependent on site conditions at 3pm on a Friday.
• 2.Parallel installation — while floors 5-10 are being installed, floors 1-4 can be fully occupied. This is worth weeks on your construction programme.
• 3.Zero weather dependency — panels are sealed before they leave the factory. A stick system in monsoon conditions is a waterproofing disaster waiting to happen.
• 4.Easier future replacement — if a panel is damaged 10 years later, you swap one unit. With stick, you're dismantling an entire bay.

When Stick System is the Right Call

Stick system isn't inferior — it's appropriate when:

• 1.Building height is under 8 floors and timeline pressure is moderate.
• 2.Budget is constrained and the performance gap doesn't justify the 30-40% premium.
• 3.The design has many non-standard shapes or custom angles — unitized panels need repetitive geometry.
• 4.The project is a renovation where access for panel hoisting is limited.

Fine Glaze's Honest Recommendation

For buildings under 8 floors in Maharashtra, stick system with proper engineering and quality silicone delivers excellent performance at 30% lower cost. We've done hundreds of stick system projects that are still performing after 15 years. For anything above 10 floors, or where your programme is tight and the building is premium, unitized pays for itself. Contact us for a recommendation specific to your project.