The process begins with detailed design based on actual opening dimensions and architectural drawings, establishing the sizes and connection methods for frames, sashes, grilles, and decorative elements. Suitable timber or other materials are selected based on design specifications and inspected for moisture content, visual quality, and dimensional accuracy. Selected materials undergo cutting and preliminary processing to prepare for component fabrication.
Component fabrication is a key stage in production. Wooden doors and windows require processes such as marking, sawing, milling, mortising, drilling, and carving; frames, sashes, and grille components are manufactured separately. Components featuring traditional ornamentation require carving or pattern detailing in accordance with the design. While modern machinery enhances dimensional and shape precision, manual finishing is employed for traditional details to ensure assembly requirements are met while preserving the craftsmanship characteristic of historic architecture. Components are numbered upon completion to facilitate subsequent assembly and on-site installation.
Fabricated components undergo pre-assembly and quality inspection. Frames, sashes, grilles, and connectors are test-fitted against the design drawings to verify dimensional compatibility, connection stability, and smooth sash operation. Once verified, surface treatments-including sanding, priming, staining, and top-coating-are applied to ensure an attractive appearance and durability. Finally, finished products are categorized, numbered, and packaged for transport to the construction site. By completing the majority of fabrication steps in a factory or workshop, the process reduces on-site labor and allows for consistent control over component dimensions and quality-a key distinction between prefabricated doors and windows for historic buildings and those traditionally fabricated on-site.