Aluminum Curtain Wall and Facade Systems for Commercial Buildings

Application Overview

The glass curtain wall has become the defining architectural element of the modern commercial building. From Bangkok's Sathorn district to Ho Chi Minh City's District 1 to Jakarta's SCBD, the skylines of Southeast Asia's business centers are defined by towers clad in aluminum and glass. Behind the glass is an aluminum curtain wall system — a precision-engineered structure that carries the glass, manages water, resists wind, and in the best cases, significantly reduces the building's energy consumption.

Curtain wall design is one of the most technically demanding applications for aluminum profiles. The mullions need to carry wind loads of 2.5–4.0 kPa on high-rise facades in typhoon-prone regions. They need to accommodate the differential movement between the building structure and the facade — typically 10–15mm per floor due to slab deflection and thermal expansion. They need to manage water infiltration through a carefully designed drainage system. And they need to do all of this while maintaining the visual appearance that the architect has specified.

At Jinshi, we supply curtain wall profiles to facade contractors across Southeast Asia. We understand the pressures of facade contracting: tight schedules, demanding clients, and the need for profiles that are structurally adequate, thermally compliant, and delivered on time. Our technical team can provide structural calculations, thermal performance calculations, and fabrication drawings to support your project from design through installation.

Stick-Built vs Unitized: Choosing the Right System

Curtain wall systems are broadly divided into stick-built and unitized systems. Stick-built systems are assembled on-site from individual mullion and transom profiles, with the glass panels installed after the frame is complete. Unitized systems are assembled in a factory as complete floor-to-floor panels, which are then lifted into position and connected to the building structure on-site.

Stick-built systems are more economical for smaller projects and for facades with complex geometry that would be difficult to unitize. They require more on-site labor and are more sensitive to weather delays during installation. For Southeast Asian projects, where labor costs are relatively low and weather is a constant factor, stick-built systems are the dominant choice for buildings up to 20–30 stories.

Unitized systems are preferred for large, repetitive facades on tall buildings. The factory assembly allows better quality control and faster on-site installation — a unitized panel can be installed in minutes, compared to hours for the equivalent stick-built area. For buildings above 30 stories, the speed advantage of unitized systems typically justifies the higher cost of the panels.

Our curtain wall profiles are designed for both systems. The stick-built profiles include standard mullion, transom, and pressure plate profiles with pre-drilled holes for the standard connection details. The unitized profiles are designed with the specific connection geometry required for the unitized panel system, including the interlock between adjacent panels that provides the water management function.

Thermal Performance: Meeting Energy Codes

Building energy codes in Southeast Asia are becoming more stringent, and curtain wall thermal performance is increasingly a compliance issue. Thailand's ECOTEC standard, Vietnam's QCXDVN 09:2017, and Singapore's BCA Green Mark all set requirements for the overall thermal transmittance (U-value) of the building envelope, including the curtain wall.

Standard aluminum curtain wall mullions have U-values of 4.5–6.0 W/m²K — well above the limits set by most energy codes for commercial buildings. Thermal break mullions, with PA66 GF25 barriers, achieve U-values of 1.8–2.4 W/m²K, typically meeting the code requirements for most climate zones in Southeast Asia.

The thermal break also addresses the condensation problem. In air-conditioned buildings, the interior surface of a standard aluminum mullion can drop below the dew point of the interior air, causing condensation that damages interior finishes and creates mold risk. A thermal break mullion keeps the interior surface above the dew point, eliminating condensation even in the most demanding air-conditioning conditions.

For projects targeting green building certification — LEED, BCA Green Mark, or EDGE — the curtain wall U-value is a scored criterion that can contribute significantly to the certification score. We can provide thermal performance calculations for our curtain wall profiles, including the frame U-value, the overall window U-value (combining frame and glazing), and the condensation resistance factor (CRF).

Request a Technical Quote

For drawings, MTRs, samples, pricing, and lead time, contact Andy: WhatsApp +86 151 1618 3980 or lkvicky2003@gmail.com. Please include profile reference, alloy/temper, surface finish, quantity, and destination port.