Multi-Slide Door System

Overview

Multi-slide door systems are designed to maximize the transition between interior and exterior spaces. Unlike traditional sliding patio doors with only two panels, multi-slide systems support three, four, six, or more panels, enabling openings that span 20 to 60+ feet.

Common Configurations

• Stacking: All panels slide to one end and stack against each other
• Pocket: Panels slide into a wall cavity, fully disappearing from view
• Split (center-open): Panels divide at the center and stack to both ends

Performance Considerations

Multi-slide systems are evaluated on:

• Thermal performance: U-factor, SHGC, condensation resistance
• Air infiltration: AAMA/WDMA test ratings (typically AL-2 or AL-3 for commercial)
• Water resistance: Design pressure and water penetration resistance
• Structural: Wind load ratings, especially for coastal and high-altitude installations

Common Frame Materials

• Aluminum (most common for large spans)
• Thermally broken aluminum (better energy performance)
• Aluminum-clad wood (premium residential)
• Fiberglass (emerging, high-performance niche)

Key Manufacturers

Western Window Systems, NanaWall, LaCantina Doors, Arcadia, Fleetwood Windows & Doors, Solar Innovations

Typical Applications

Luxury residential (great rooms, primary suites, covered patios), hospitality (indoor-outdoor dining), commercial (lobbies, storefronts)