Designed for wide unobstructed openings, smooth folding operation, and a refined architectural finish, our bifold door systems help connect interior living spaces with patios, courtyards, and outdoor entertaining areas.
Modern Aluminum Bifold Doors for Indoor–Outdoor Living
• Wide, unobstructed openings
• Smooth folding operation
• Custom sizes and configurations
Nationwide Shipping
Available across all 50 states
Custom Configurations
Multiple panel and stacking options
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Thermally Broken Frames
Improved insulation and comfort
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Low-E Insulated Glass
Energy-efficient glazing options
From Closed-Off to Wide Open Living
See how a bifold opening transforms light, space, and flow.
Designed for Modern Openings
Custom Sizes
Tailored to fit expansive residential and commercial openings.
Frame Finishes
Powder-coated finishes and custom RAL colors available.
Glass Options
Energy-efficient insulated glass with multiple tint and performance options.
Performance & Construction
Performance
U-Value 0.3
Air Leakage 0.3
Water Tightness 550pa Level 6
Wind Resistance 4000 Pa-Level 7
Sound Insulation 36 dB Level 7
Construction
Aluminum 6063-T5
Frame depth: 3"
Panel depth: 2-1/2"
Frame width: 1-3/8"
Panel width: 1-3/4"
Sleek Handle Sets
Minimal design with ergonomic comfort and modern finishes
Heavy-Duty Hinges
Reinforced structural hinges engineered for durability and smooth operation
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Precision Rollers
Precision-engineered rollers for effortless, silent movement
Premium Hardware
10Panel
4 Panel
Configuration Options
Choose from a range of panel counts, opening directions, and stacking layouts to suit your project requirements.
2 Panel
3 Panel
4 Panel
5 Panel
6 Panel
7 Panel
8 Panel
9 Panel
10Panel
Performance & Reliability
Engineered for durability, precision, and long-term performance
Warranty
•10-Year Structural Frame Warranty
• 5-Year Finish Protection
• 3-Year Glass & Glazing Coverage
• 3-Year Hardware Warranty
Installation
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Professional Installation by Certified Team
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Ongoing Phone & Video Support
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Full-Service Process: (Measurement → Delivery → Installation)
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Detailed Installation Guide Included
Screen Options
Enhance your bifold system with a discreet retractable screen — designed for airflow, protection, and seamless integration.
Smooth Operation
Insect Protection
Wide Opening Spans
Premium Black Mesh
Frequently Asked Questions
Aluminum bifold doors are multi-panel glass systems that fold and stack neatly to one or both sides, creating a wide, open connection between indoor and outdoor spaces.
They’re ideal for patios, living rooms, and large openings where you want maximum light and seamless transitions.
Every system is custom-made to your opening size.
To get an exact configuration and quote, send us your width × height and project location.
Bifold doors transform your space by opening entire walls, bringing in natural light, and creating a luxury indoor-outdoor experience.
Key benefits include:
-
Ultra-wide openings
-
Slim modern frames
-
Energy-efficient glass
-
Increased property value
👉 The final look depends heavily on your exact opening size and layout.
Send us your dimensions (width × height), and we’ll recommend the best configuration for your project.
-
Yes — all of our bifold systems are fully custom.
We manufacture based on your exact opening, whether it’s a standard patio or an oversized wall system.
👉 We can accommodate large openings, multi-panel configurations, and unique layouts.
Share your width × height and we’ll design a system tailored to your space.
Absolutely — bifold doors are designed specifically for large, open spaces.
We offer configurations with multiple panels that can span wide openings while maintaining smooth operation and structural stability.
👉 Larger openings require proper panel layout and hardware selection.
Send us your opening size and we’ll show you the best layout options.
Yes — our systems use thermally broken aluminum profiles and insulated low-E glass to reduce heat transfer and improve comfort.
They are designed to perform well in both hot and cold climates.
👉 Performance can vary depending on glass type and system size.
Send us your project details and we’ll recommend the best energy-efficient setup.
Bifold doors can be configured to open inward or outward depending on your space and preference.
We also offer multiple stacking options:
-
Left stack
-
Right stack
-
Center split
👉 The best option depends on your layout and available space.
Send us your opening size and layout — we’ll recommend the ideal configuration.
-
Yes — we ship and install in all 50 states.
Our experienced installation crews travel nationwide, allowing us to handle projects from start to finish — whether you’re a homeowner, builder, or architect.
👉 From design to final installation, we ensure a seamless process anywhere in the U.S.
Send us your city and opening size (width × height), and we’ll guide you through the next steps.
Yes. Our team can help you select the best panel layout, opening direction, threshold, and sizing based on your project goals and opening dimensions.
Send us your opening size (width × height) and location — we’ll design your system and provide a custom quote.
Frequently Asked Questions
Aluminum bifold doors are multi-panel glass systems that fold and stack neatly to one or both sides, creating a wide, open connection between indoor and outdoor spaces.
They’re ideal for patios, living rooms, and large openings where you want maximum light and seamless transitions.
Every system is custom-made to your opening size.
To get an exact configuration and quote, send us your width × height and project location.
Bifold doors transform your space by opening entire walls, bringing in natural light, and creating a luxury indoor-outdoor experience.
Key benefits include:
-
Ultra-wide openings
-
Slim modern frames
-
Energy-efficient glass
-
Increased property value
👉 The final look depends heavily on your exact opening size and layout.
Send us your dimensions (width × height), and we’ll recommend the best configuration for your project.
-
Yes — all of our bifold systems are fully custom.
We manufacture based on your exact opening, whether it’s a standard patio or an oversized wall system.
👉 We can accommodate large openings, multi-panel configurations, and unique layouts.
Share your width × height and we’ll design a system tailored to your space.
Absolutely — bifold doors are designed specifically for large, open spaces.
We offer configurations with multiple panels that can span wide openings while maintaining smooth operation and structural stability.
👉 Larger openings require proper panel layout and hardware selection.
Send us your opening size and we’ll show you the best layout options.
Yes — our systems use thermally broken aluminum profiles and insulated low-E glass to reduce heat transfer and improve comfort.
They are designed to perform well in both hot and cold climates.
👉 Performance can vary depending on glass type and system size.
Send us your project details and we’ll recommend the best energy-efficient setup.
Bifold doors can be configured to open inward or outward depending on your space and preference.
We also offer multiple stacking options:
-
Left stack
-
Right stack
-
Center split
👉 The best option depends on your layout and available space.
Send us your opening size and layout — we’ll recommend the ideal configuration.
-
Yes — we ship and install in all 50 states.
Our experienced installation crews travel nationwide, allowing us to handle projects from start to finish — whether you’re a homeowner, builder, or architect.
👉 From design to final installation, we ensure a seamless process anywhere in the U.S.
Send us your city and opening size (width × height), and we’ll guide you through the next steps.
Yes. Our team can help you select the best panel layout, opening direction, threshold, and sizing based on your project goals and opening dimensions.
Send us your opening size (width × height) and location — we’ll design your system and provide a custom quote.
Send an approximate size - we'll guide you step by step.
Not sure about your measurements?
Customer Projects & Gallery
See how Cornerstone bifold doors transform homes across the USA.
