The Aluminium Casement Door is a door product constructed primarily from aluminium alloy profiles, designed to open and close via side-mounted hinges. Featuring a narrow-frame structure, single glazing, inward opening mechanism, and a flush exterior design, it serves effectively as both a passageway door and a space divider. It is commonly utilized in bathrooms, bedrooms, walk-in closets, kitchens, studies, and commercial partition areas, making it an ideal choice for complementing the overall door and window systems in modern residential homes and commercial projects.

| Item | Specification |
| Product Name | 40*12 Out Flush Surface-Inward Opening Swing Door |
| Keyword | Aluminium Casement Door |
| Frame Width | 40mm |
| Sash Visible Width | 15mm |
| Profile Thickness | 2.0mm |
| Glass Configuration | 5mm Single Glass |
| Hardware | Custom Hardware |
| Opening Type | Inward Opening |
| Optional Color | Grey, Champagne, Black, White |
The 40*12 Out Flush Surface—Inward Opening Swing Door features an exterior-flush design; when the door sash is closed, it aligns perfectly with the outer frame surface, creating a visually seamless and tidy aesthetic. The 40mm frame width, paired with a slim 15mm visible sash profile, minimizes the visual bulk of the door frame, resulting in a cleaner and more streamlined interior elevation. This design is ideal for spaces such as bathrooms, bedrooms, and studies, and is particularly well-suited for commercial projects requiring a uniform appearance across multiple door openings.
This Aluminium Casement Door features a slender 15mm visible sash profile, maximizing the glass-to-frame ratio to minimize visual obstruction. Compared to standard interior aluminum swing doors, the narrow-frame proportion lends a sense of lightness and spaciousness to the room. The use of 5mm single-layer glass makes it an excellent choice for interior partition doors, effectively delineating zones while preserving natural light flow. For modern residential homes and apartment complexes, the slender door frame integrates effortlessly into minimalist interior design schemes.
Constructed with 2.0mm thick aluminum profiles and a sturdy 40mm frame structure, this door is engineered to withstand the demands of frequent daily use. The aluminum alloy material features a smooth surface finish and offers excellent corrosion resistance, making it suitable for use in bathroom dry zones, kitchens, walk-in closets, and commercial partitions. HEKIN offers comprehensive customization options for bulk orders, allowing clients to configure door dimensions, glass styles, surface finishes, and hardware solutions to meet specific project requirements.
The Aluminium Casement Door features single-layer glass and clean, simple frame lines; the exterior surface is designed with minimal complex grooves or recesses, making daily cleaning and maintenance effortless. The inward-opening mechanism is ideal for interior door applications, ensuring that the door does not obstruct external hallways or public circulation areas. In spaces prone to moisture or dust accumulation—such as bathrooms, walk-in closets, and kitchens—the smooth, flush surface significantly reduces cleaning burdens and enhances the long-term user experience.
Available in a selection of finishes—including Gray, Champagne, Black, and White—this Aluminium Casement Door complements a wide range of interior styles, from "light luxury" and minimalist aesthetics to modern and commercial-oriented designs. The inward-opening direction can be configured for left- or right-hand operation to optimize spatial flow, while hardware components can be further customized to align with specific project needs. For high-end residential fit-outs, hotel guest rooms, and commercial spaces, this flexibility in color and hardware configuration ensures seamless integration and aesthetic harmony with the overall interior design scheme.

Bathroom doors require a design that balances privacy, natural lighting, and ease of cleaning. The 40*12 Out Flush Surface—Inward Opening Swing Door is ideal for use in dry bathroom zones, vanity areas, and en-suite entrances. Featuring 5mm single-layer glass—available in frosted or fluted (Changhong) finishes to suit specific project requirements—the door utilizes an aluminum alloy frame that is highly resistant to humid environments. Its flush surface design also ensures effortless daily cleaning.
Bedroom doors should maintain visual tranquility and spatial harmony. This Aluminium Casement Door is suitable for the doorways of master bedrooms, secondary bedrooms, and guest rooms. The slim 15mm visible sash profile lends the door a lightweight, airy aesthetic, while black or champagne-colored frames allow for seamless integration with modern interior furnishings. The inward-opening mechanism aligns well with standard residential traffic flow patterns and facilitates a cohesive visual integration with adjacent walls, cabinetry, and lighting systems.
Closet doors should conserve visual space while preserving a sense of display and openness. The 40*12 Out Flush Surface—Inward Opening Swing Door is perfect for walk-in closets, master bedroom storage zones, and display cabinet entrances. Its narrow-profile aluminum frame paired with a glass sash allows for a clear, unobstructed view of clothing displays without making the bedroom feel enclosed—making it an excellent choice for high-end residential projects.
Kitchen doors serve to partition off cooking fumes while maintaining ample natural light. This product is suitable for semi-open kitchens, transitional zones between dining and cooking areas, and Western-style kitchen spaces. The single-layer glass design preserves a visual connection between the dining room and the kitchen, while the aluminum alloy frame offers superior ease of cleaning compared to traditional wooden doors. The inward-opening swing structure is well-suited for narrower doorways, facilitating convenient daily access and efficient spatial management.
Commercial spaces require doors that offer a clean aesthetic, low maintenance, and a unified visual appearance. The 40*12 Out Flush Surface—Inward Opening Swing Door is an ideal choice for offices, meeting rooms, showrooms, and private club suites. With a 40mm frame depth and a 15mm visible sash profile, the door features crisp, defined lines. Available in black, white, or gray finishes, it can be tailored to match a wide range of commercial interior styles, making it highly suitable for large-scale commercial projects.


