uPVC & Aluminium French Door Fitters London | Window Fitters Ltd

French Patio Door Supply & Installation Services

As leading window and door contractors, French doors are a timeless addition to any home, providing a graceful transition between your interior living spaces and garden, patio, or balcony. Featuring large double-glazed glass panes, they flood your home with natural light while providing easy access and wide openings. At Window Fitters Ltd, we specialize in the custom sizing, supply, and professional installation of high-quality uPVC and aluminium French doors across London and Surrey.

Technical Specifications & Material Options

We supply and fit French doors engineered to the highest standards, matching the architectural style of your home while ensuring maximum efficiency and security:

• Premium uPVC French Doors: Highly cost-effective, durable, and low-maintenance. Built with multi-chambered profiles and internal steel reinforcement ribs to prevent twisting under thermal stress.
• Modern Aluminium French Doors: Feature ultra-slim profiles for a minimalist look, offering maximum glass areas and exceptional structural strength. Built with polyamide thermal-break barriers to prevent cold bridging.
• Energy-Efficient Glazing: Fitted with 28mm double-glazed units using Low-E glass, argon gas fill, and warm-edge spacer bars (no aluminium spacer), achieving U-values of 1.4 W/m²K or better to exceed Building Regulations Document L requirements.
• Toughened Safety Glass (Document K): All glazing complies with BS EN 12150 requirements for critical locations, ensuring safety and impact resistance.
• Weatherproofing Seals: Double EPDM rubber gaskets and compression seals around the master and slave door rebate prevent wind and water ingress.
• Background Ventilation (Document F): Background trickle ventilators integrated into the head of the frame to maintain fresh air circulation and prevent condensation.

Advanced Multi-Point Security

French doors feature two opening panels, which makes robust locking mechanisms critical. Our installations prioritize security as standard, conforming fully to Document Q:

• Multi-Point Locking Systems: Equipped with secure hook bolts, deadbolts, shootbolts (at head and sill), and roller cams that lock both the master and slave doors firmly together.
• 3-Star Anti-Snap Cylinders: High-security TS007 3-star cylinders designed to resist common break-in techniques such as lock-snapping, drilling, and bumping.
• PAS 24 & Document Q Certified: Tested and certified to meet PAS 24 security standards, ensuring robust security for ground-floor garden entry.

Why Choose Window Fitters Ltd?

Whether you require a comprehensive Supply and Fit service or have already purchased your French doors and need an Installation Only specialist, we coordinate the entire process. All of our installations are completed by highly trained fitters who ensure precise alignment, weather-proof sealing, and smooth latch operation. We handle the local building control notifications directly to ensure your new doors are fully inspected and certified.

Request a Free Door Design Survey

Contact our London and Surrey installation specialists to discuss frame options, measure your openings, and receive a transparent, itemised quote.

• Phone: 020 3411 0589
• Email: info@windowfitters.uk

About the Author: Marian Gheorghe

Head Window Fitter & Active Director, Window Fitters Ltd

Marian Gheorghe is the Head Window Fitter and Active Director of Window Fitters Ltd. With over 15 years of hands-on experience in the glazing and glazing industry across London, Marian leads the direct-employment labour force and oversees technical safety compliance for all residential and commercial JCT contracts. He ensures every installation conforms to British Standards and UK Building Regulations.

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