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Professional Flat Door Supplier in China
Flat doors are valued for their minimalist design, showing a smooth, clean surface without decorative panels. At KYoung, we design flat doors that give both a stylish look and works really well in the real-world. Their smooth surface fits perfectly with modern interior styles, complementing kitchens, bedrooms, offices, hotels, and commercial spaces.
Our flat doors use either solid core or engineered core construction, which make sure durability and stability for the long-term. Solid cores reduce noise very well and offer really good resistance to impact, making them suitable for areas that are busy. Engineered cores offer a lighter, more affordable solution while still performing better flat doors with hollow core.
Surface finishes are fully customizable, painted doors provide consistent color and a clean, polished look. Wood veneer or laminate surfaces bring warmth and texture to interiors while keeping it resistant to daily use. KYoung uses on-point techniques for finishing to make sure surfaces are smooth and uniform on large orders.
Flat doors can be used as single swing, double swing, or sliding doors. They can also be customized with optional glass inserts or integrated panels so natural light could still enter the room while still having privacy. Our OEM and ODM services allow flexibility in dimensions of doors, surface finish, and preparation of hardware.
At KYoung, we combine design, engineering, and factory precision to deliver flat doors that meet visual and functional requirements. This makes them suitable for residential apartments, hotels, offices, and commercial buildings where clean, modern aesthetics and durability are important for clients.
This door features a soft herringbone wood pattern on a flat surface. It feels modern but warm. Kyoung offers full customization for size, color, and finish.
KYOUNG J116 flat door is designed with a deep dark wood tone and clean flat surface. The look is strong and minimal. Kyoung provides full customization for color, size, and texture.
This door shows a subtle diagonal wood grain pattern that gives it additional movement. It looks modern and calm. Kyoung offers full customization for grain direction and finish.
Features a light wood tone with a smooth flat surface. The simple look fits modern interiors. Kyoung supports full customization for size, color, and surface style.
Our M01-1 flatdoor is designed with fine vertical wood grain lines across the door. The texture feels clean and balanced. Kyoung offers full customization for grain style, size, and color.
This door has a dark wood finish with a smooth flat design. It gives a quiet and modern look. Kyoung provides full customization for finish, size, and details.
Features a two-tone flat design with subtle vertical texture at the bottom, which makes it more attractive to the eye. Kyoung offers full customization for layout, color, and finish.
KYOUNG J116-1 flat door is designed with a natural light wood grain and black frame edge. The contrast looks modern and sharp. Kyoung supports full customization for frame and surface options.
Flat, smooth panels offer a modern,clean look, preferred in residential, hotel, and interiors for commercial areas.
High-density solid or engineered cores avoids changing of door shape, bending, and daily wear, making sure it’s stable for a long time.
Painted, wood veneer, and laminate options allow accurate colors and texture matching for each project.
Hinges, lock, and handle positions that are already pre-drilled reduce installation time and make sure alignments are consistent on multiple doors.
Sleek Flat Door Design for Modern Interiors
Flat doors are perfect for interiors that have a contemporary theme because of their minimalist panels. They create a clean look that works well in residential apartments, offices, and hospitality spaces. Its simplicity allows designers to focus on other elements like lighting, flooring, and furniture. The flat surface also makes doors easier to clean and maintain compared to doors that have decorative panels. KYoung flat doors offer color that are consistent, smooth finishes, and precise edges to enhance the quality and beauty of interior in any project.
Full Customization of Flat Doors for Every Project
KYoung flat doors support full customization, you can choose dimensions, thickness, panel orientation, and surface finish to meet the requirements of your project Painted, wood veneer, or laminate finishes can be fit easily to any interior color palette. OEM and ODM services make sure production is consistent for large-scale projects, so every door maintains uniform appearance and quality. Hardware preparation, including pre-drilled hinge and lock positions, lowers on-site labor and make sure installation of these flat doors are hassle-free.
Durable and Reliable Flat Doors for Long-Term Use
Flat doors from KYoung are designed to last. Reinforced solid or engineered cores prevent changes in door shape or bending, on-point assembly makes sure the door remains aligned even after years of use. Surfaces are tested for scratch, moisture, and resistance to abrasion. Pre-installed hardware positions allow problem-free operations and lowers installation errors. These features make flat doors suitable for areas that are busy like in residential buildings, hotels, offices, and commercial facilities.
Flat Door Solution We Can Provide
KYOUNG solid core flat doors are heavy and strong. The solid core gives better sound reduction and a more premium feel. Kyoung offers full customization for size, thickness, and finish.
Our hollow core flat door is lightweight and easy to install, these doors are ideal for spaces that do not need sound control. Kyoung provides full customization for surface material and design.
KYOUNG MDF flat door is made from smooth MDF panels, these doors are easy to paint and give a clean flat look. Kyoung offers full customization for colors, coatings, and dimensions.
Built with layered wood for better stability, these doors resist warping over time. Kyoung supports full customization for veneer type and surface finish.
These doors incorporates many materials to balance strength and weight. They offer stable performance at a reasonable cost. Kyoung provides full customization for core structure and finish.
KYOUNG high-density flat door is designed with a dense core for extra strength and sound control. These doors feel solid and durable. Kyoung offers full customization for thickness, weight, and surface style.
- Our Factory
- Drawing
- Project
We installed KYoung flat doors on 150 apartments. The doors had smooth surfaces, consistent finishes, and arrived ready for installation. Pre-drilled hardware positions saved us a lot of time. The solid core construction felt strong and stable, and the team communicated well during the entire process.
James CarterProject Manager, Construction CompanyFor a boutique hotel project, KYoung delivered flat doors with perfect finish and exact dimensions. The doors were easy to handle, looked clean, and matched our interior theme. Their OEM service made bulk production stress-free, and quality control ensured no defective doors were shipped.
Emily ZhangInterior Designer
Which type of flat door is better for soundproofing, solid core or engineered core?
A flat door with a solid core is denser and therefore more soundproof, making it suitable for quieter environments such as bedrooms, offices or hotels. Flat Door with engineered core is lighter and has a lower acoustic performance. When solid core doors are installed with a seal and a suitable frame, they can achieve the sound insulation capacity of a common acoustic door, which is around 30-40 dB.
What is the difference between a solid core flat door and an engineered core flat door?
The solid core flat door is solid, so it is heavier and stronger. It is less likely to be damaged and has a better soundproofing effect. This type of door is usually used in places where doors open and close frequently, are prone to being knocked, or need to be quiet and private, such as bedroom doors, hotel room doors, and office room doors.
Engineered core flat door: with an engineered wood or composite structure inside, the door is lighter and less costly, but not as strong as a solid core door and less soundproof. It is more suitable for internal ancillary rooms such as checkrooms and storage rooms.
Can a flat door be made into a fire rated flat door?
Yes, it is possible to achieve an FD30 or FD60 fire rated flat door by adding a fire rated core to a solid core flat door with a certified door frame.
Does a flat door need a waterproof structure for a bathroom or laundry room?
Yes. Bathrooms and laundry rooms are high humidity environments and can easily absorb water and warp, crack or damage surfaces if you use regular doors.
Therefore, a waterproof or moisture-resistant Flat Door, such as a WPC door, PVC door, or a solid or engineered core door that has been treated with a water-resistant finish is recommended for these types of spaces. The edges of the door should also be sealed to further prevent moisture intrusion and damage.
What is the difference between painted flat door, veneer flat door and laminated flat door?
The painted flat door surface is coated with PU or water-based paint in a wide range of colors and sheens with an even and smooth surface. It has a clean and neat appearance and is suitable for high-end residential, hotel or office use.
The veneer flat door is coated with natural wood veneer, which retains the wood grain and natural texture, and is warm to the touch. It is suitable for places with high visual and tactile requirements, such as hotel rooms, residential bedrooms or office spaces.
Laminated flat door is covered with a wear-resistant layer, which achieves a variety of textures and colors, and is scratch-resistant, moisture-resistant, and easy to clean. It is suitable for environments such as kitchens, bathrooms, apartments or commercial spaces that are frequently used and prone to wear and tear.
Can a flat door be floor-to-ceiling?
Flush doors can be customized in height, width and thickness to meet project requirements for full height floor to ceiling installation.
Solid core doors are more structurally stable and durable for long term use.
Engineered door cores are lighter in weight and lower in cost, but slightly less durable and stable than solid core doors.
Casement doors can be installed with hidden hinges or frameless door covers to make the door face flush with the wall. Door finishes can be painted, veneered or laminated for a modern, minimalist look.
Do swinging doors support frameless systems?
Yes, they can. Flush doors themselves do not have decorative borders and are suitable for frameless installation. The positions of hinge and lock holes can be reserved at the design stage or customized through OEM/ODM to achieve the effect of door flush with the wall or hidden door, while guaranteeing the aesthetics and practicality.
Can a flat door be used as a hidden door or flush wall door?
Yes. The casement door itself is a flat structure without complex molding, so it’s easy to make it flush with the wall, and it is perfect for a concealed or frameless door.
When installing the door, as long as with hidden hinges, magnetic locks or a hidden push-pull structure, you can hide the door frame and hardware, and the door will be almost invisible from the outside.
At the same time, casement doors can be customized as needed in terms of size and surface materials, such as paint, veneer or laminate overlay, so that the appearance of the door can be consistent with the wall, making it easier to make a hidden effect.
Can pre-drilled hardware help reduce installation errors on a flat door?
Yes, and the effect is obvious. Because the hinge holes, lock holes and handle holes have been processed in the factory according to the uniform size and position, the hole position of each door is consistent, and the installation does not require workers to measure, draw lines and punch holes. This avoids the deviation brought about by inaccurate measurement or operation error on site, and also reduces the risk of breaking or installing the door panel crookedly.
This is especially important in projects such as apartments, hotels or office buildings where a large number of doors need to be installed at once. After the holes are unified, the construction crew can quickly install them according to the standard process and rarely need to rework, which not only improves the construction efficiency, but also makes the overall effect more stable and better looking.
What affects the price of a custom flat door?
The price of a custom Flat Door is determined by the combination of core construction, finish, size and complexity of the customization, and the price difference between different combinations can often be as much as 2-4 times.
The following is a comparison of mainstream configurations and actual costs based on projects and factory quote ranges, which can help you quickly determine which Flat Door option is more suitable for your budget.
| Cost Factor | Common Options | Typical Factory Price (USD / door) | Price Impact | Buyer Insight |
| Door core
| Hollow core | 60–120 | Lowest | Only suitable for low-end or temporary projects |
| Engineered core | 90–180 | Best value | Most used in hotels, apartments, offices | |
| Solid core | 150–300+ | Highest | Chosen for corridors, sound control, fire-rated doors | |
| Surface finish
| Painted | Base price | Lowest | Clean look, moderate scratch resistance |
| Laminate | +15–30% | Medium | Most durable, best for commercial projects | |
| Wood veneer | +30–60% | Higher | Used for high-end interiors and showrooms | |
| PVC / Thermofoil | +20–40% | Medium–high | Good moisture resistance, uniform look | |
| Door size
| Standard size | Base price | Lowest | Lowest cost per door |
| Non-standard / full height | +20–40% | Higher | Used in luxury and designer projects | |
| Hardware prep
| No pre-drilling | Base price | Lowest | Slower on-site installation |
| Pre-drilled hinge & lock | +10–40 | Small increase | Strongly preferred for project installation | |
| Customization
| Standard flat door | Base price | — | Most cost-efficient |
| Glass insert / hidden door | +40–100% | Big jump | High design impact but much higher cost | |
| Order quantity
| 10–30 pcs | Highest unit cost | +20–50% | Not suitable for custom production |
| 100–300+ pcs | Lowest unit cost | Big savings | Ideal for apartment, hotel & office projects |
Flush door vs. panel door: what’s the difference?
Flush Door / Flat Door has a complete flat surface with an interior that is usually a solid or engineered core. Because the door body is one piece and is more evenly stressed, it is less likely to warp or crack than a panel door in projects such as hotels, condominiums and office buildings. Also, solid or engineered core construction provides better sound insulation, which is important for bedrooms, hotel rooms and office spaces.
Panel Doo is constructed from multiple panels assembled together for greater shape and linearity, making it suitable for cottage, European or traditional style spaces. However, this type of structure is prone to warping, cracking or uneven splicing with long-term use. The installation and commissioning of panel doors and post maintenance are also usually more time-consuming and costly in engineering projects.
In terms of cost, a panel door is typically 15-40% more expensive than a flat panel door if the core material and finish are the same, as it requires more CNC machining, assembly and manual alignment. In high-volume projects, flat panel doors are easier to standardize, with lower unit costs and more consistent delivery.
