How does a unitized curtain wall system differ from stick-built systems in project execution?

Unitized and stick-built curtain wall systems differ in manufacturing, logistics and on-site labor requirements, and these differences drive execution strategy for projects from Dubai to Almaty. A unitized curtain wall system is manufactured as large, factory-assembled panels—complete with glazing, insulation, and perimeter seals—that are delivered ready-to-install. This approach offers tight factory quality control, reduced on-site labor, faster installation rates, and better protection of finished surfaces during installation. Unitized systems minimize scaffolding duration and are advantageous for high-rise projects with constrained site access or aggressive schedules typical in GCC developments. Stick-built systems are assembled piece-by-piece on-site using extruded mullions, transoms and field-cut glass; they offer greater flexibility for irregular geometries, late design changes, or phased construction but demand more skilled labor and longer on-site sequencing. In corrosive or dusty Middle Eastern environments, the higher factory QA of unitized panels reduces the risk of finish damage and ensures consistent thermal and water-tightness performance. Logistical considerations include crane access and panel weights for unitized systems and storage/handling space for both systems; for remote Central Asian sites, lead time and transport to site may influence the decision. Ultimately, choice depends on project schedule, tolerances, budget, and local labor availability; many owners opt for unitized metal curtain wall systems to streamline construction, guarantee factory-tested performance, and reduce on-site quality risk.