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Custom Double Glazed Doors Supplier in China
Double glazed doors are mostly used in buildings that are modern because they improve comfort and energy efficiency. At KYoung, we design these doors considering real project use and not just the way it looks. Each double glazed door uses two glass panels separated by a sealed air space. This gap works as insulation. It slows movement of heat and minimizing the sound from outside, which is important for residential and commercial buildings.
We offer several glass options including clear glass for maximum light, frosted glass for privacy, low E glass for energy saving, and tinted glass for glare control. Glass thickness commonly ranges from 5 mm plus 9A plus 5 mm to 6 mm plus 12A plus 6 mm, depending on insulation and strength requirements. For higher safety needs, laminated glass can also be used.
Frame materials include solid wood, engineered wood, aluminum clad wood, and moisture resistant composite frames. These options allow the double glazed doors to perform well everywhere it’s installed, including areas that are highly humid. Opening styles include hinged doors, sliding doors, and folding systems. Hardware selection can be adjusted for left or right opening, soft close function, and heavy duty daily use.
Our factory controls glass processing, sealing, frame assembly, and final inspection. This ensures the doors close properly, seal tightly, and remain stable over time. KYoung double glazed doors are usually used in projects for residential, office buildings, hotels, and spaces for retail. We support OEM and ODM production with drawings, sampling, and consistent mass production.
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KYOUNG 6BC87 double glazed door features a wide frosted glass panel with a white classic frame. Double glazing improves comfort, and Kyoung fully customizes size, glass style, and frame finish.
Designed with a narrow vertical glass insert inside a dark wood frame. Double glazed glass adds insulation, and Kyoung offers full customization for layout and details.
KYOUNG BK91 double glazed door uses a slim brushed glass panel with a modern textured frame. Double glazing helps lessen the noise, and Kyoung supports full customization for colors and materials.
Features a clear glass strip that is really tall inside a light wood frame. Double glazed construction improves comfort, with full customization available from Kyoung.
KYOUNG BM02 double glazed door is designed with ribbed frosted glass for privacy and light control. Double glazing adds insulation, and Kyoung allows full customization of glass pattern and frame style.
Combines panel detailing with a vertical frosted glass insert. Double glazing improves indoor comfort, and Kyoung fully customizes size, finish, and glass design.
Features a narrow vertical glass window in a textured modern frame. Double glazed glass improves insulation, with options on full customization offered by Kyoung.
Uses arched frosted glass with classic panel styling. Double glazing enhances comfort, and Kyoung provides full customization for traditional or modern interiors.
Two glass panels with an insulated air gap help slow heat transfer and support better indoor control of temperature.
Double glazing make outside noise minimal which makes it suits well for offices, apartments, hotels, and busy areas in urban places.
We use tempered or laminated glass options that improve impact resistance and meet building safety standards.
Available in multiple glass types, frame finishes, and opening styles to match different need of any project.
Why Double Glazing on Doors Matters
Double glazing helps buildings perform better every day. The insulated air space between glass panels reduces heat loss and limits outside noise. This improves living and working standards for modern buildings and improve long term value of property.
Design Choices For Different Spaces
Different projects need different double glazed door designs. That is why we offer clear, frosted, low E, and decorative glass options. Frame colors, surface finishes, and profiles are adjustable to suit modern or traditional interiors. Door size, thickness, and opening direction are also customized based on site conditions.
Factory Control for Stable Quality
Being consistent on quality is very important for large projects, our factory follows strict steps for glass sealing, spacer alignment, and frame installation. Each double glazed door is checked for smooth opening, tight sealing, and surface quality before packing. This reduces installation issues and delays on site.
Our Double Glazed Doors Range
Opens in one clear direction using side hinges. The simple design feels familiar and reliable, with double glazing for better indoor comfort.
KYOUNG double swing double glazed doors opens both inward and outward with one push. This makes walking through easier in busy areas, while double glazing improves comfort between rooms.
Rotates smoothly on top and bottom pivots without the use of hinges. The centered movement gives a modern feel and a wider, more balanced opening.
Slides smoothly along a side track without swinging open. This keeps furniture in its place without having to move and uses double glazed glass to reduce sound transfer.
KYOUNG bi-fold double glazed doors use panels that fold together and stack neatly to one side. This design creates a wide opening while double glazed glass helps keep indoor temperature stable.
Slides completely into the wall and disappears when open. This design saves space and keeps the room clean, while double glazed glass helps reduce noise.
- Our Factory
- Drawing
- Project
We selected KYoung double glazed doors for a commercial office project. The noise reduction was noticeable and the doors helped keep indoor temperature stable. Sizes are really accurate and the doors were easy to install. Communication during production was clear, which helped us stay on schedule.
Mark ThompsonConstruction Project ManagerOur design team needed custom double glazed doors with frosted glass for a residential development. KYoung give options that are clear and also necessary technical details before production. The final doors matched the drawings well and felt solid in use. The quality was consistent on every unit.
Emily ZhaoInterior Designer
What is a double glazed door made of?
A double-glazed door is made up of two panes of glass separated by an aluminum or composite spacer, creating a sealed hollow layer. The cavity is filled with dry air or inert gas, which reduces the transfer of heat and sound.
The two panes of glass are set into a solid wood, aluminum-clad wood, or moisture-resistant composite door frame. This is coupled with a sealing tape and hardware system to form a complete, well-sealed door structure.
What are the benefits and limitations of double glazed doors?
The main advantage of double glazed doors is that they provide good thermal and acoustic insulation, as well as enhancing the comfort and overall class of the space, making them popular in homes, apartments and commercial premises.
However, compared with ordinary doors, double-glazed doors have a complex structure, high cost and weight, and more stringent requirements on installation precision and the load-bearing capacity of hardware. If the sealing process is poor, it may reduce thermal and acoustic insulation performance. However, reputable door manufacturers can effectively avoid these problems through strict process control and production management.
What’s the difference between single, double, and triple glazed doors?
| Feature | Single Glazed | Double Glazed | Triple Glazed |
| Glass Layers | 1 | 2 with sealed air/gas gap (~9–12 mm) | 3 with 2 sealed air/gas gaps (~9–12 mm each) |
| UValue (Thermal Insulation) | ~5.5–6.0 W/m²K | ~1.8–2.8 W/m²K | ~0.8–1.6 W/m²K |
| Sound Reduction (Rw) | 20–25 dB | 32–38 dB | 40–45 dB |
| Weight & Frame | Light | Moderate | Heavy, reinforced frame needed |
| Cost | Low | Moderate | High |
| Best Use | Internal rooms, budget projects | Homes, offices, apartments, hotels | Cold climates, noisy areas, high-end projects |
So if you want to keep your budget in check, single glazed doors are enough; if you need normal insulation and noise reduction, double glazing is the way to go; and if your project is in a cold or noisy environment, go for triple glazed doors.
How do double glazed doors achieve energy efficiency?
Double glazed doors save energy because the layer of air between the panels stops heat loss through the door. According to the table above, the U-value of a double glazed door is typically one-third to one-half that of a single glazed door. This means that heat loss is significantly reduced at the same temperature.
For example, if the indoor temperature is kept at 20°C in winter and the outdoor temperature at 0°C, a 2 square meter single-glazed door loses about 4 kWh of air-conditioning power a day, whereas a double-glazed door has only 1.5 to 2 kWh, which is an energy saving of 50 to 60%. Therefore, the use of double-glazed doors can significantly reduce the burden on air conditioning and heating systems.
How effective is double glazed door noise reduction?
Single-pane glass doors have an Rw rating of approximately 20–25 dB, while double-pane glass doors typically achieve 32–38 dB. Each 10 dB increase in sound insulation roughly halves the perceived noise level. This means double-pane doors typically reduce noise by 60–70% compared to single-pane doors.
For example, if the traffic noise outside is 70 decibels, the subjective experience of a person passing through a double-glazed door is only about 21 to 28 decibels.
Which glass is better for a double glazed door: tempered glass or laminated glass?
Tempered glass is highly impact resistant and will break into small, round particles in the event of a breakage, making it suitable for use in large-area windows and doors. Laminated glass, whose fragments are held in the interlayer when it breaks, provides better acoustic and intrusion protection, but costs more than tempered glass.
In fact, many high-end double-glazed doors use a combination of tempered and laminated glass: the outer layer of the door uses tempered glass, and the inner layer uses laminated glass. This ensures the safety of the door and improves functionality while keeping the budget under control.
What are the performance and cost differences between double glazed doors made from different frame materials?
The table below summarizes the performance and price differences of commonly used door frame materials for double-glazed doors for your reference：
| Material | Features | Thermal Performance (U-value) | Sound Insulation (Rw) | Strength & Durability | Typical Price Range (Supply Only) |
| Timber/Wood | Natural material, customizable appearance | 1.6–2.5 W/m²·K | 35–40 dB | High strength, requires antirot and insect treatment | ~$800 – $2,000+ |
| Aluminium | High strength, slim and modern design | 2.5–3.5 W/m²·K (nonthermally broken); 1.8–2.5 W/m²·K (thermally broken) | 32–38 dB | Durable, but conducts heat; thermal break improves insulation | ~$450 – $1,500 |
| uPVC | Low maintenance, corrosion-resistant | 1.8–2.5 W/m²·K | 32–38 dB | Good weather resistance, limited load capacity, not suitable for large doors | ~$300 – $1,000 |
Can double glazed doors prevent the glass from fogging?
Double glazed doors are insulated by a sealed layer of air between the two panes of glass, which keeps the inner surface temperature of the glass close to room temperature. Compared to single pane glass, quality double glazing with sealed edges and low-e coatings can reduce condensation by about 80 to 90 percent.
Are Double-Glazed Doors suitable for coastal and Extreme-Climate environments?
Yes, industry tests have shown that weather-tested double glazed doors maintain good sealing and structural stability in high humidity environments, coastal areas, and extreme temperature conditions. They are thermally insulated to design requirements, and sound and thermal insulation properties remain reliable.
Are there fire-rated double glazed doors available?
Yes, fire rated double glazed doors are available. These doors are usually made with toughened or laminated fire rated glass and are fitted with fire rated door frames and high performance seals. In the event of a fire, the door body is able to maintain structural stability while providing some thermal isolation protection.
According to relevant standards, such as EN 1634-1 in Europe and GB 12955 in China, these doors are generally categorized as FD20, FD30, FD60 and FD90, which indicate that the door can maintain fire resistance and thermal insulation for 20, 30, 60 or 90 minutes, respectively, in the event of a fire.
What spaces are double glazed doors best suited for?
Double glazed doors are suitable for installation in residences, office buildings, hotels and all types of commercial spaces where better indoor temperature control and noise isolation are often required. You can customize the glass, frame material and opening method of the double glazed doors according to the specific needs, matching a variety of decorative styles such as modern, Scandinavian, luxury or minimalist phase.
Can double glazed doors be made as invisible doors or full-wall glazing systems?
Certainly. Double glazed doors can be designed in the form of invisible doors or full wall glazing to meet the needs of modern architecture and commercial projects. In projects, this design not only ensures that the doors are soundproof, insulated and secure, but also gives the overall space a visually coherent appearance.
What should be noted during installation and use?
Double-glazed doors are reinforced and sealed in accordance with building use standards when they leave the factory, so during handling and installation, unnecessary knocks or damage can be avoided if basic protective measures are followed.
After the door is put into use, the door body and the glass itself do not need special maintenance, only need to regularly check whether the seals and hardware are intact, you can maintain good heat insulation, sound insulation and use performance for a long time.
How to repair seal failure or glass damage of double glazed doors?
When the double-glazed door is fogged, watered, or the glass is broken, the correct solution is to have the entire insulated glass unit replaced by a professional supplier in accordance with the original size and configuration. If only the door frame seals or the hardware are aging, the problem can be solved by replacing the seals or adjusting the hardware.
