Bi-Fold Doors Installation

We supplied and installed a premium aluminium bi-fold door system tailored to the extension opening. As a leading bi-fold door installer across Harpenden and the surrounding Hertfordshire region, we used only the highest-grade materials available. The solution included:

• Four-panel aluminium bi-fold door with ultra-slim profiles (down to 154mm sightlines) for uninterrupted garden views
• Bottom-mounted stainless steel rollers for smooth, quiet folding operation
• Thermally broken profiles for energy efficiency and condensation control
• Low-threshold cill with ultra-low threshold option for step-free garden access
• Multi-point locking system with high-security handles
• Double glazing with low-E coating and argon gas fill
• Toughened safety glass throughout for enhanced security
• Powder-coated finish in dark grey (RAL 7016) to complement the extension’s exterior
• Concealed drop-down seals for superior weatherproofing
• Matching handles and hardware for a unified finish
• 10-year guarantee covering frames, glazing, and workmanship for complete peace of mind

Installation Process

• Conducted precise laser measurement of the extension opening
• Coordinated with the homeowners to confirm configuration and colour selection
• Checked structural lintel and floor levels for proper alignment
• Removed existing French doors and prepared the opening
• Installed steel reinforcement where required for the bi-fold system (supports doors up to 6m wide)
• Lifted aluminium bi-fold door frame into position using precision packers
• Mechanically fixed the frame to the new masonry and timber studwork ensuring zero movement
• Hung each door panel and adjusted bottom rollers for perfect alignment
• Fitted double-glazed sealed units with toughened safety glass into all panels
• Installed multi-point locking mechanism and tested all locking points
• Applied internal and external silicone seals for airtight, watertight finish
• Tested folding and sliding operation across all panels multiple times
• Completed thorough clean of all glass, tracks, frames, and surrounding areas