How does project timeline differ when using unitized versus stick curtain wall solutions?

Project timelines are shaped by design decisions, manufacturing lead times, and site installation windows. Unitized systems shift effort earlier in the schedule: detailed engineering, tooling, and factory production occur during the design and pre-construction phases. This front-loading means longer lead times before first shipments but significantly compressed on-site erection phases. For developers in the Middle East and Central Asia, this can speed overall project delivery by months — critical where early occupancy or revenue is important.

Stick systems push more work onto the site. Their shorter factory lead times and simpler transport can suit fast-start projects or those with late-stage design changes. However, stick installations typically extend site duration due to sequential on-site assembly, glazing, and sealant curing. Weather interruptions and on-site coordination can further stretch timelines.

We advise clients to model the entire critical path: if the project benefits from early completion (GCC towers, commercial centers), unitized systems’ reduced site schedule often outweigh greater upfront lead time. For remote Central Asian sites with limited crane capacity or restricted logistics, stick systems may allow a more practical schedule. Our company assists clients with integrated schedule analyses that compare lead time, installation, and commissioning to identify the most time-efficient approach.