When you are sourcing thermal break windows from a factory in China, one of the first questions that comes up is simple: how long will my order take? Unlike buying a standard window off a shelf, a factory-manufactured system window passes through a carefully controlled production chain, and every stage has an impact on the final delivery date. Understanding the typical production cycle not only helps you plan your project schedule, it also tells you a lot about whether a supplier is genuinely capable or simply good at giving optimistic quotes.
This article walks through the full production cycle in a thermal break window factory, stage by stage, with realistic time estimates. We base these figures on common practice among established manufacturers such as ALPES, a professional China-based system window and door maker with two integrated production centers in Foshan and Zhaoqing, Guangdong.
A thermal break aluminum window is not produced in one sitting. It moves through a sequence of processing stations, each with its own machinery, quality checks, and waiting time. Below is a realistic stage-by-stage breakdown of what happens inside a qualified casement window factory, including typical durations for a standard order of regular-size units.
| Stage | Typical Duration | What Happens |
| 1. Profile production & thermal break assembly | 3–7 working days | Aluminum profiles are cut, then joined with the insulation strip (such as the PA66GF25 thermal break) to form the multi-chamber structural profile. |
| 2. CNC fabrication & machining | 2–4 working days | Cutting, drilling, and slotting of frames, sashes, and mullions to the exact dimensions on the order drawings. |
| 3. Assembly & corner joining | 2–5 working days | Frame and sash corner assembly, injection-adhesive sealing, and fitting of hardware from partners such as ROTO, Winkhaus, CMECH, or Wehag. |
| 4. Glazing & sealing | 2–4 working days | Insulated glass, screen mesh, and multi-layer sealing strips are installed to close the unit and lock in thermal and acoustic performance. |
| 5. Quality inspection | 1–2 working days | Dimensional checks, seal and water-tightness testing, hardware function tests, and surface finish review. |
| 6. Packing & loading | 1–2 working days | Protective wrapping, crate packing for export, and container loading ready for shipment. |
Adding these together, a standard order typically completes in about 15 to 25 working days from the moment factory production begins, before any sea freight time is counted. This is consistent with what leading suppliers report for routine, uncomplicated projects.
The figure above is a baseline. The real production cycle can stretch depending on several factors that buyers should anticipate when planning their schedule:
Production is only part of the story. For international buyers, the days counted on the factory floor are followed by logistics time. Export packing and inland transport typically take about 3 to 5 days, and the ocean freight leg can run anywhere from two to five weeks depending on the destination port. A realistic end-to-end timeline from order to delivery will almost always be longer than the pure production cycle, so it is wise to ask the supplier for a clear split between manufacturing time and shipping time.
A trustworthy factory keeps its lead time consistent because the process is standardized. ALPES, for example, maintains a 100,000 square meter manufacturing base across two production centers, allowing raw profile machining, hardware fitting, glazing, and packing to run in a coordinated flow. The company manufactures according to international building codes using 6060-T66 grade profiles with thicknesses from 1.8mm to 2.5mm, multi-chamber thermal break systems, and hardware from established German partners. A structured production line is exactly what turns a confident quote into a delivery date that is actually met.
The typical production cycle for thermal break windows runs from about two to four weeks of manufacturing, with additional time for packing and shipping. A well-organized factory, strong quality control, and a transparent production plan are the real drivers of an on-time delivery. By understanding each stage of the process, you can set realistic expectations, choose the right partner, and keep your construction or renovation project moving smoothly.
If you are planning a project and want a clear picture of lead times for custom thermal break aluminum windows, contact the ALPES team with your sizes and quantities, and they will walk you through the timeline and options in detail.
