Modern Waterproof Bi Fold Doors Villa Exterior Patio Aluminum Foldable Door Partition Accordion Glass Folding Patio Doors System
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Product Overview
Aluminum alloy folding doors are a new type of window and door product in modern architecture that combines the functions of space division and decoration. They are equipped with a high-strength aluminum alloy frame and adopt a multi-panel door fan linkage folding structure design to achieve flexible opening and storage of the door body. The product integrates the lightweight, high-strength, corrosion-resistant, and easy-to-process characteristics of aluminum alloy materials, along with insulating, soundproof, dustproof, and security features of double-pane glass and precise mechanical transmission systems. It can maximize the release of passageway space and is suitable for various scenarios such as home, commercial, and office use. It is an ideal solution for space division that combines practicality and decoration.
Core Structure and Material Selection
(1) Overall Structural Design
The product adopts an integrated architecture of "aluminum alloy frame - glass combination - sealing system - mechanical transmission - folding linkage":
1. Aluminum Alloy Frame: The main frame uses 6063-T5 grade aluminum alloy, with a multi-chamber structure design (chamber quantity ≥ 3 chambers), enhancing structural strength and insulation performance; the door frame wall thickness is ≥ 1.4mm, and the track aluminum alloy wall thickness is ≥ 2.0mm, ensuring no deformation or loosening during long-term use; the frame joint areas use corner clips + joint glue reinforcement technology, with verticality and levelness deviation ≤ 2mm/m, improving overall stability.
2. Glass System: Standardly equipped with double-layer insulating tempered glass (5 + 12A + 5mm), which breaks into blunt-edged particles, without the risk of splashing and injuring people; optional laminated tempered glass (PVB film thickness ≥ 0.76mm), Low-E insulating glass, and triple-layer insulating glass (5 + 12A + 5 + 12A + 5mm), respectively enhancing safety protection, energy-saving insulation, and noise reduction; the glass and aluminum alloy are sealed with butyl rubber + polysulfide rubber double-layer seal, with inert gas filling rate ≥ 90%, ensuring a moisture-proof sealing effect.
3. Sealing System: Uses high-elasticity EPDM (triple rubber) sealing strips, with Shore hardness of 50-60 degrees, with a temperature range of -40℃ to 120℃, excellent anti-aging and anti-tear performance; the door panels and door panels, door panels and tracks, door panels and frames form multiple sealing structures to completely block air and moisture infiltration paths; the bottom of the track is equipped with a dust-proof strip, effectively blocking dust from entering and maintaining the cleanliness of the track.
4. Mechanical Transmission System: Core uses dedicated folding door hardware components, including linkage hinges, load-bearing pulleys, transmission handles, locks, etc.:
- Linkage Hinges: Made of stainless steel, with a load-bearing capacity of ≥ 30kg per piece, opening angle 0°-90°, flexible and smooth without jamming;
- Load-bearing Pulleys: Selecting a nylon + stainless steel double-wheel structure, with excellent wear resistance, sliding resistance ≤ 5N, and a service life of ≥ 30,000 times;
- Transmission Handles: Made of zinc alloy, with a surface treated by electroplating or spraying, resistant to corrosion, convenient to operate, and capable of synchronously locking multiple door panels.
5. Folding Structure: Supports single-opening and double-opening folding methods. The number of door panels can be configured as needed (conventional 3-8 panels), folding and retraction to one side or both sides, with the retraction width being only 1.2 times the width of a single door panel, maximizing space savings; the track adopts upper-bearing or upper-lower double-bearing design, with the upper-bearing track bearing the main weight of the door panel, running more smoothly, and the upper-lower double-bearing design is suitable for large-span and heavy-door scenarios.
(2) Key Material Standards
Component Material Requirements Execution Standard
Aluminum Alloy Frame 6063-T5 grade, oxide film thickness ≥ 10μm, coating adhesion ≥ 2 grade GB/T 5237—2017
Glass Tempered glass impact resistance meets GB 15763.2, dew point of insulating glass ≤ -40℃ GB/T 11944—2012 Sealant strips: EPDM (Ethylene Propylene Diene Monomer), tensile strength ≥ 10 MPa, compression permanent deformation ≤ 20%. According to GB/T 14683—2017
Hardware accessories: Made of stainless steel or zinc alloy. Salt spray test ≥ 48 hours, opening times ≥ 30,000 times. According to GB/T 24601—2009
Sealant: Weather-resistant silicone sealant, tensile bonding strength ≥ 1.5 MPa, aging resistance life ≥ 15 years. According to GB/T 14683—2017
Core Performance Parameters
Basic Performance Indicators/Performance Category Indicator Parameters
Wind Pressure Resistance Performance Grade ≥ 3 (wind pressure value ≥ 1.0 kPa), customizable up to 5 (≥ 2.0 kPa)
Water Tightness Performance Grade ≥ 2 (leakage pressure ≥ 300 Pa), no visible leakage
Air Tightness Performance Grade ≥ 5 (air infiltration per unit seam length ≤ 1.0 m³/(m·h))
Sound Insulation Performance Weighted sound insulation of double-pane glass ≥ 30 dB, triple-pane glass ≥ 35 dB
Heat Insulation Performance Heat transfer coefficient K value of ordinary aluminum alloy frame ≤ 3.2 W/(㎡·K), broken bridge aluminum alloy frame ≤ 2.0 W/(㎡·K)
Safety Performance Anti-impact performance ≥ 1 grade, anti-theft performance can be selected as A or B grade (compatible with anti-picking hardware)
Sliding Life Number of sliding times of the pulley ≥ 30,000, no obvious wear and jamming
Installation and Maintenance Specifications
Installation Requirements
1. Before installation, check the size of the opening and the specifications of the door body to ensure that the verticality and flatness deviation of the opening is ≤ 5 mm, and the reserved installation gap is 20 - 30 mm; the installation surface of the track needs to be flat and firm, with a levelness deviation of ≤ 1 mm/m to avoid affecting the sliding of the door panel.
2. Frame fixation uses expansion bolts or chemical anchor bolts, spacing ≤ 600 mm, ensure firm connection with the wall or ground; the frame and the wall or ground are filled with polyurethane foam, and the outside is applied with weatherproof sealant to ensure sealing and waterproofing.
3. Hardware accessories installation position is accurate, fixed firmly, the linkage hinges and pulleys need to be adjusted to be flexible and smooth in rotation; after the door panel installation, the horizontal and vertical positions need to be adjusted to ensure uniform gaps between the door panels and a tight closure.
4. Electric folding doors need to be correctly connected to the power supply, debug the motor operation and remote control function to ensure coordinated movement; after installation, conduct opening and closing tests to check for no jamming, leakage, and then can be accepted.
Daily Maintenance
1. Avoid sharp objects hitting, scratching the profiles and glass, and do not drill holes or cut grooves on the door body (to avoid damaging the structure and sealing performance);
2. Regularly (every six months) clean the surface of the profiles, glass and track, use a damp cloth to wipe, avoid using strong acid and alkali cleaning agents; if there are any debris in the track, it needs to be cleaned in time to ensure smooth sliding of the door panel.
3. Hardware accessories need to be regularly (every year) added with lubricating oil to keep the opening flexible; if there is loosening or jamming, it needs to be tightened or replaced; if the sealant strip is aged, cracked or Fall off， it needs to be replaced in time.
4. Avoid the door body remaining in a fully open state for a long time， especially in outdoor scenarios， to prevent damage to the door body components caused by strong winds and rain； when not in use for a long time， it is recommended to fold the door panel and lock it， and take protective measures.
5. Electric folding doors need to regularly check the motor， wiring and remote control device， keep dry and clean to avoid moisture short circuit； open and close the door several times per month to ensure the motor operates normally.
Specification and size range
- Single door size: Width 400mm - 800mm, Height 1800mm - 3000mm;
- Total width range: Single-folded door total width 1500mm - 4800mm, Double-folded door total width 3000mm - 8000mm;
- Maximum door weight: Single door panel weight ≤ 60kg, Total weight ≤ 300kg (suitable for upper and lower double load-bearing rails);
- Rail height: Upper load-bearing rail height ≥ 80mm, Lower load-bearing rail height ≥ 50mm (customized ultra-thin rails are available, height ≥ 30mm);
- Surface color: Supports powder coating (conventional colors: white, gray, brown), fluorocarbon coating (custom colors), wood grain transfer (wood imitation texture), etc. surface treatment processes.
Scope of Application
- Civil buildings: balcony doors, courtyard doors, study partitions, closet partitions, etc. for villas, garden-style houses, and high-rise residences;
- Commercial buildings: storefront doors, partition doors, private room doors, etc. for shops, malls, hotels, and restaurants;
- Office buildings: meeting room partitions, office doors, corridor partitions, etc. for office buildings andOffice building；
- Special scenarios： sunrooms， leisure areas， high-end clubs， etc.， which have high requirements for space flexibility and decoration in places with such demands.
Product Core Advantages
1. High Space Utilization: The multi-fan interlocking folding design allows for complete storage when opened, with a passage width of over 90% of the total width. It is suitable for large-span spaces (such as balconies, courtyards, and shops), effectively expanding the usable space; when folded, it does not occupy additional area, maintaining a clean and transparent space.
2. Safe and Durable: The aluminum alloy profile surface undergoes oxidation and spraying treatments, featuring excellent corrosion resistance and UV resistance. It does not rust or fade, with a service life of ≥ 20 years; tempered glass + high-strength hardware components provide reliable impact resistance and anti-drop performance; multiple sealing and reinforcement structures ensure the overall stability of the door.
3. Excellent Sealing and Insulation: The EPDM sealing strips are combined with insulating glass, along with multiple sealing structures, effectively blocking air infiltration and heat conduction. It provides good insulation in winter and heat insulation in summer, reducing energy consumption; it also has good sound insulation, capable of isolating external noise, creating a quiet and comfortable indoor environment.
4. Strong Decorative Properties: Supports various colors and surface treatment processes, matching different decoration styles such as Chinese style, European style, and modern style; the profile lines are simple and smooth, with a large glass area, providing sufficient lighting, enhancing the sense of space transparency; customizable door panel quantity and opening method can be achieved to adapt to different space layouts.
5. Convenient Operation: The precise design of the hardware transmission system ensures smooth door sliding, effortless opening and closing, without any jamming or abnormal sounds; the handle linkage locking design enables simultaneous locking of multiple door panels, providing safe and convenient operation; some products can be equipped with electric transmission systems, allowing for remote opening and closing, suitable for high-altitude or heavy-weight door bodies.
6. Wide Adaptability: Customizable dimensions, colors, and opening methods can be provided to adapt to various scenarios such as residences, shops, offices, and hotels; it can seamlessly connect with balconies, courtyards, partitions, etc., providing both space division and decorative functions.
FAQ：
1. Where are aluminum alloy folding doors suitable for installation? What size is appropriate for home use?
It has strong adaptability and can be installed in various locations such as balconies, entranceways of courtyards, living room partitions, study sliding doors, etc. for home use; for commercial use, it is suitable for storefronts, restaurant private rooms, and office partitions. For home use, the width of a single door panel is recommended to be 400mm - 800mm, and the total width can be adjusted according to the opening size, with a height not exceeding 3000mm to avoid affecting stability due to excessive size.
2. Does the aluminum alloy folding door take up space when opened? What is the maximum opening width for passage?
It does not take up space. The door panel can be folded and stored on one side or both sides. After storage, the width is only about 1.2 times that of a single door panel. The maximum passage width can reach over 90% of the total door opening width, fully releasing space.
3. Why is the sliding of the aluminum alloy folding door not smooth and there are jams? How to solve it?
Common reasons include dust or debris in the track, wear of the pulley, and non-level installation of the door panel. Solution: First, clean the dust and debris in the track; if the pulley is worn, replace it with the same model nylon-stainless steel double wheels; if the door panel is tilted, adjust the hinge or track height to ensure the door panel is level.
4. How is the sealing performance of the aluminum alloy folding door? Will it leak air or water?
Qualified products are equipped with multiple layers of EPDM sealing strips, ensuring good sealing performance. Air leakage and water leakage are mostly caused by aging of the sealing strips, uneven gap between the door panel, or cracking of the sealing rubber during installation. It is necessary to replace the aging rubber strips in time, adjust the gap to be uniform, and reapply weather-resistant sealant.
5. Are the hardware components of the aluminum alloy folding door prone to failure? How long is their service life?
High-quality stainless steel/zinc alloy hardware components have strong durability. With normal use and regular maintenance, the number of sliding times of the pulley is ≥ 30,000 times, and the overall service life of the hardware can reach 10 - 15 years. Daily use should avoid violent pushing and pulling, and add lubricating oil to the hinges and pulleys regularly.
6. Can the aluminum alloy folding door be made electric? How to choose between electric and manual models?
It can be made electric, equipped with a DC speed reducer motor, supporting remote control and automatic sensing opening. The manual model has a higher cost-performance ratio and is suitable for home scenarios with low installation height and low opening frequency; the electric model is suitable for large-sized, heavy door panels, or installation in high places (such as storefronts), and is more convenient and efficient to operate.
7. Are aluminum alloy folding doors suitable for installation on high-rise residential balconies? Can the wind resistance be sufficient?
Suitable, but choose products with a wind pressure resistance grade of ≥ 3. The type of profile and the design of the upper and lower double-bearing track with a wall thickness of ≥ 1.4mm are preferred. During installation, firmly fix the frame to ensure that the spacing of the expansion bolts is ≤ 600mm. In coastal strong wind areas, custom upgrades to wind pressure resistance to 5 can be made.
8. Can the glass of the aluminum alloy folding door be replaced? Will it hurt if it breaks?
It can be replaced. The standard is tempered glass, which breaks into blunt-angle particles and will not fly and hurt people; if you want to upgrade, you can replace it with laminated tempered glass or insulating glass. When replacing, it is necessary to match the size of the door panel frame and reapply sealing.
9. Will the color of the aluminum alloy folding door fade? How to clean and maintain it daily?
The surface of high-quality profiles is treated with powder coating or fluorocarbon coating, which has strong resistance to ultraviolet rays. Under normal use for 10 - 20 years, it will not significantly fade. Daily cleaning is with a damp cloth on the profiles and glass, avoid using strong acid and alkali cleaning agents; clean the track once every half year and add lubricating oil to the hardware components.
10. Compared to sliding doors, which is better between aluminum alloy folding doors?
The aluminum alloy folding door has a larger passage width when opened and higher space utilization, suitable for large-span door openings; sliding doors have a simple structure and more affordable price, but only half of the door opening width can be utilized when opened. If you pursue space transparency and large passage capacity, choose the aluminum alloy folding door; if the budget is limited and the door opening is small, choose the sliding door.
11. Can the aluminum alloy folding door be customized? What is the maximum size it can be made to?
It can be customized. The width of a single panel is 400mm - 800mm. The total width of a single panel can reach 4800mm, and that of a double panel can reach 8000mm. If a larger size is required, it is necessary to upgrade with thicker profiles and heavy-duty hardware. At the same time, the load-bearing capacity of the building opening must be confirmed.
12. How is the sound insulation performance of the aluminum alloy folding door? How can the sound insulation performance be improved?
The folding door with standard 5 + 12A + 5mm insulating glass has a weighted sound insulation value of ≥ 30dB, which can block out daily noises. To enhance the sound insulation effect, you can upgrade to triple-pane insulating glass or laminated insulating glass. At the same time, ensure that the sealing strips are intact to minimize sound leakage through the gaps.
