Sliding Patio Door Installation

A residential property in Southgate required a new patio door to replace an ageing unit that had become difficult to slide, draughty, and visually dated. The door opens from a rear living area onto the garden, so smooth operation and a strong connection to the outdoors were essential. The owners wanted a bold, contemporary finish that would lift the rear elevation while improving thermal efficiency and security. The goal was to install a black aluminium sliding patio door that would combine slim sightlines with effortless daily operation.

Our Solution

We supplied and installed a black aluminium sliding patio door tailored to the existing opening. Aluminium was chosen for its slim profiles, strength, and durability compared with alternative frame materials. The solution included:

• Slim-profile aluminium frame in matt black (RAL 9005) for clean sightlines and maximum glass area
• Two-panel sliding configuration with one fixed and one sliding leaf
• Thermally broken aluminium profiles to reduce heat loss and prevent condensation
• Double-glazed units with low-E coating and argon gas fill for improved thermal efficiency
• Toughened safety glass in both panels
• Multi-point locking system with anti-snap cylinder and black handles
• Concealed stainless steel roller system for smooth, quiet operation
• Low-threshold track for step-free garden access
• Matching black cills, trims, and weather seals for a cohesive finish

Installation Process

• Conducted a site survey with precision laser measurements of the existing opening
• Confirmed sliding configuration, glazing specification, and hardware with the owners
• Removed the old patio door and frame carefully to preserve surrounding brickwork and internal finishes
• Disposed of all waste materials responsibly
• Inspected and prepared the structural opening, lintel, and sub-cill
• Lifted the black aluminium frame into position using precision packers and laser levels
• Mechanically fixed the frame to the structure, ensuring zero movement
• Fitted the fixed glazed panel and hung the sliding panel on the roller mechanism
• Adjusted rollers for smooth, effortless sliding operation
• Installed toughened double-glazed sealed units into both panels
• Fitted and tested the multi-point locking system
• Applied internal and external silicone seals for an airtight, watertight finish
• Adjusted handles, track, and locking points for reliable daily use
• Completed thorough clean of glass, frames, tracks, and surrounding areas
• Demonstrated operation and maintenance to the owners