The 93 series folding external doors aluminium use a top-hung and bottom-slide structure, targeting exterior openings that need stable thermal insulation and structural reliability. A 14.8mm thermal break strip and reinforced center mullion directly address the sagging issues common in large folding systems.
- 14.8mm thermal break strip paired with 27A hollow glass for exterior climate separation
- Reinforced center mullion and adjustable hinges counter long-term panel sagging
- Hidden hinge system keeps sightlines clean on bifold glass doors exterior
- High rail and water-blocking low rail options adapt to different threshold conditions
Product Details
Load transfers primarily to the upper track (2.5mm wall thickness), while the bottom rail guides the panels. Main profiles sit at 2.0mm. The reinforced center mullion concentrates operational force at the door's center point, actively resisting the sagging that affects folding doors exterior over time.
Balance bearings inside the hinges cut friction for smoother panel movement, and fully concealed hinges keep the facade clean when closed. The 27A hollow layer in the 5+27A+5 glass targets energy efficiency. Engineering rules recommend even sash counts and exclude fixed top glass, ensuring spec-reliable outcomes for demanding projects.
Product Features
14.8mm Thermal Break Strip: A wide thermal barrier within the profile that cuts heat transfer for exterior folding applications.
Reinforced Center Mullion: Distributes structural force evenly and improves wind pressure resistance, keeping panels aligned long-term.
Concealed Adjustable Hinges: Hardware hides away when closed for minimalist sightlines, while still allowing precise vertical and horizontal alignment.
Integrated Balance Bearings: Built into the hinges to reduce friction, making panel sliding noticeably smoother with less physical effort.
Dual Threshold Options: High rail or water-blocking low rail to match specific architectural and drainage requirements.
27A Hollow Glass Configuration: The wide air spacer in the 5+27A+5 unit contributes to thermal separation and acoustic dampening.
Customizable Styles
Glass Configuration: Standard 5+27A+5 hollow glass, or upgrade to 5G+27A+5G for bifold glass doors exterior projects.
Track Type: Specify high rail or water-blocking low rail based on threshold flushness and drainage needs.
Door Leaf Dimensions: Leaf widths from 500-850mm and heights from 1000-3800mm, subject to project validation.
Electric Blinds: 27A electric blinds within the glass unit for integrated light and privacy control.
Bottom Guard Plate: Optional door leaf bottom guard plate for additional lower edge protection.
Hardware Accessories
Hidden Hinges: Adjustment function for precise panel alignment; stays out of sight when closed.
Balance Bearings: Integrated inside the hinges for smooth, balanced panel movement during operation.
Key Lock Cylinder: Standard lock cylinder provided for secure access control on the active door panel.
Reinforced Mullion Hardware: Connects the center mullion to distribute structural force evenly across the system.
Fluorocarbon Aluminum Bar: Black hollow bar with brand LOGO separates glass panes reliably within the sealed unit.
Basic Parameters
Performance Item | Available Information | Buyer Notes |
|---|---|---|
Thermal Insulation | 14.8mm thermal break strip + 27A hollow layer | Request test reports for specific U-values on folding external doors aluminium. |
Wind Pressure Resistance | Improved by reinforced center mullion | Confirm compliance with local building codes. |
Water Tightness | Water-blocking low rail option available | Specific grades not provided; request test reports for project compliance. |
Air Tightness | Not specified in current documentation | Request test data to verify performance for your project. |
Sound Insulation | 27A hollow layer contributes to acoustic dampening | No specific STC rating provided; confirm requirements with the factory. |
Product Specifications
Parameter | Detail |
|---|---|
Product Name | 93 Thermal Break Series Folding Door |
Product Type | Folding door with thermal break structure |
Material | Aluminum profile (thermal break); confirm alloy grade with factory |
Standard Glass | 5+27A+5 / 5G+27A+5G |
Hollow Layer | 27A |
Thermal Break Strip | 14.8mm |
Profile Wall Thickness (Main) | 2.0mm |
Upper Track Wall Thickness | 2.5mm |
Door Leaf Max Width / Height | 850mm / 3800mm |
Door Leaf Min Width / Height | 500mm / 1000mm |
Grid Bar Model | 25×25 |
Opening Style | Top-hung and bottom-slide folding |
Customization | Track type, glass, electric blinds, bottom guard plate |
Notes | Dimensions refer to door leaf design; confirm overall door dimensions with factory process sheets |
Advantages
Anti-Sagging Structure: Even force distribution and reinforced mullion keep panels aligned, addressing a common folding door issue.
Concealed Hardware: Hinges hide completely when closed, giving a minimalist appearance for architectural projects.
Threshold Adaptability: High rail and water-blocking low rail options accommodate varied drainage and accessibility needs.
Heavy-Duty Profiles: Main profiles at 2.0mm and upper track at 2.5mm provide structural rigidity for large openings.
Spec-Ready Data: Detailed profile weights and wall thicknesses allow accurate material costing and engineering calculations.
Application Scenarios
Apartment: Balcony openings benefit from the water-blocking low rail, creating a flush transition that maximizes interior space without compromising drainage.
Home Office: The optional 27A electric blinds offer immediate light and privacy control, separating work areas from external distractions on demand.
Hotel: Concealed hinges present a refined, uninterrupted glass facade for terrace access, aligning with hospitality design standards.
Office Building: The 14.8mm thermal break strip manages heat transfer across large exterior spans, contributing to consistent interior temperatures.
Outdoor: Buyers must confirm weather resistance, water tightness, and surface finish durability against local exposure conditions before specifying for outdoor use.
Residential Building: An even sash count recommendation and reinforced mullion ensure long-term structural stability for daily family use.
Exterior: As folding doors exterior, verify wind pressure compliance and installation conditions with local building codes prior to procurement.
Villa: Wide openings up to 3800mm in leaf height allow expansive views, while the thermal break structure supports energy efficiency in larger homes.
FAQ
What are these folding external doors aluminium?
The 93 Thermal Break Series folding door uses a top-hung and bottom-slide structure, a 14.8mm thermal break strip, and hidden hinges for exterior applications.
Where can these folding doors exterior be used?
Exterior openings requiring thermal separation and large panel spans—balconies, terraces, commercial facades. Confirm local code compliance for your site.
Can bifold glass doors exterior be customized?
Yes. Options include glass type, high or low rail, electric blinds, and bottom guard plates. Sash dimensions are project-dependent within the specified leaf ranges.
What information is needed for a quote?
Provide overall door dimensions, number of sashes, rail type, glass configuration, and project location. This ensures accurate costing and validates structural parameters.
Are these suitable for B2B commercial projects?
Yes. Detailed profile weights and wall thicknesses support specification writing and cost estimation. Buyers must verify performance grades and local code compliance independently.
Are technical documents available?
Profile weights, wall thicknesses, and assembly schemes are documented. Request specific test reports for thermal, wind, and water performance grades.
What should buyers confirm before ordering?
Confirm even sash counts to avoid sagging, that no fixed top glass can be added, whether dimensions refer to leaf or overall sizes, and the correct rail type for the threshold.
How should buyers confirm certification, packaging, and shipping details?
Confirm applicable certifications, packaging methods, and shipping logistics directly with the factory to ensure compliance with target market regulations.
