Custom aluminum windows are not produced by one simple step. For builders, contractors, developers and distributors, every project usually starts from drawings, window schedules or BOQ, then moves through material preparation, machining, assembly, inspection, packaging and delivery.

A clear aluminum window manufacturing process helps reduce mistakes, control quality and keep the project schedule easier to manage. For factory-direct aluminum windows and doors, each step should match the approved project details before shipment.

1. Review Drawings and Project Requirements

Before production, the factory needs to review the window schedule, BOQ, drawings, opening sizes, glass requirements, frame color and hardware options. This step is important for custom aluminum windows because each project may include different sizes, window types and installation conditions.

For contractors and developers, clear drawings help the aluminum window supplier confirm the right system, quantity and production details before cutting materials.

2. Prepare and Check Aluminum Profiles

After the order details are confirmed, aluminum profiles are prepared according to the selected window and door system. The factory checks profile type, surface finish, color and length before production.

Proper checking and alignment help keep the following production steps more accurate, especially for bulk aluminum windows and doors used in construction projects.

3. Cutting, Punching and Milling

Aluminum profiles are cut according to approved sizes. After cutting, punching and milling are completed for drainage holes, lock positions, hardware installation and frame connection.

These machining steps affect the final fit of the window frame, sash, hardware and sealing system. For project windows and doors, accurate machining can reduce installation problems later.

4. Frame Assembly and Hardware Installation

After machining, the aluminum window frame and sash are assembled. The factory checks the corner connection, frame squareness and opening direction during this stage.

Hardware such as handles, locks, hinges, rollers or sliding tracks is installed and adjusted according to the product type. Good hardware assembly is important for long-term use, especially for aluminum windows and doors used in hotels, apartments, villas and commercial buildings.

5. Glass Assembly

Glass is installed after the frame and sash are ready. Depending on the project, the glass may be tempered glass, laminated glass, Low-E glass or insulated glass.

During glass assembly, workers check the glass size, placement, gasket, sealing and overall fit. For custom aluminum windows, glass matching is one of the key steps that affects safety, sound insulation and energy performance.

6. Cleaning, Inspection and Packaging

Before packaging, the finished aluminum windows and doors should be cleaned and inspected. The factory checks surface finish, glass, hardware, opening function, accessories and labels.

Export packaging helps protect aluminum frames, glass and hardware during sea shipping. For project supply, clear labels are also important because they help the site team identify each window and door by item number, floor or room.

7. Sorting, Warehousing and Dispatch

After packaging, products are sorted according to the packing list and project schedule. The factory arranges warehousing, loading and dispatch based on shipping requirements.

For overseas projects, the aluminum window and door factory should provide packing photos, loading photos and shipment documents to help buyers check the order before delivery.

8. Customs Clearance and Delivery to Site

After dispatch, the products move through export shipping, customs clearance and final delivery. For builders and contractors, safe delivery is part of the full project supply process.

When the goods arrive at the construction site, clear labels and proper packaging can help reduce confusion, speed up unloading and make installation easier.

What Buyers Should Prepare Before Production

• Window schedule, BOQ or project drawings
• Window and door sizes, quantities and opening directions
• Glass type, frame color and hardware requirements
• Performance needs such as sound insulation, water resistance or wind pressure
• Packaging, labeling and delivery requirements

AMJ Custom Aluminum Window Manufacturing Support

AMJ supplies custom aluminum windows and doors for builders, contractors, developers and distributors. We support project drawing review, aluminum profile selection, glass matching, hardware options, factory production, export packaging and bulk delivery.

As an aluminum window and door factory, AMJ helps project buyers manage the process from drawing to delivery, making custom aluminum window supply more efficient and easier to control.