BI-FOLDING DOOR SYSTEM

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The ALT BF73 bi-folding door system represents a cutting-edge solution in modern architectural design. These innovative doors are engineered to create seamless transitions between indoor and outdoor spaces, offering unparalleled views, enhanced natural light, and a touch of contemporary elegance.  The ALT BF73 bi-folding door system offers a sophisticated and functional solution for homeowners and businesses seeking to enhance their living or working spaces.

With their stunning aesthetics, exceptional performance, and seamless integration, these doors are sure to elevate any architectural project. 

• Panoramic Views: The BF73 system minimizes sightlines with slim frames, maximizing the amount of glass and providing breathtaking panoramic views of your surroundings. 
• Space-Saving Design: When closed, the doors fold neatly away, conserving valuable interior space. When open, they create a wide, unobstructed opening, seamlessly connecting your living area with the outdoors. 
• Enhanced Energy Efficiency: Featuring high-performance thermal breaks, the BF73 system minimizes heat loss and gain, improving energy efficiency and reducing energy costs. 
• Improved Security: Equipped with robust hardware and secure locking mechanisms, these doors offer enhanced security and peace of mind. 
• Versatility: Available in a range of configurations and finishes, the BF73 system can be customized to suit various architectural styles and individual preferences. 
• Smooth Operation: The doors operate smoothly and effortlessly, ensuring ease of use for years to come.

Infill unit thickness................................. up to 1–3/4” 

Sash width............................................ up to 47” 

Sash height.......................................... up to 118” 

Sash weight ..................................... up to 265 lbs 

Thermal performance ............ U = 0.25 BTU/(hr×ft2 ×°F) 

Acoustical performance................... STC 40 OITC 35