Transform your living space with sleek, secure, and energy-efficient aluminium bi-folding doors. At [Your Company Name], we proudly supply and install premium systems from leading brands: Korniche Bi-Fold, Smart Visofold 1000 Slim Bi-Fold, and Cortizo Bi-Fold Plus — serving homeowners across Pinner, Chesham, Little Chalfont, Gerrards Cross, Brent, Stanmore, and nearby areas.
Perfect for modern extensions, renovations, or new builds, our doors blend architectural style with functional performance to truly elevate your home.
One of the UK’s most trusted aluminium bi-fold systems, the Smart Visofold 1000 Slim offers an ideal balance of contemporary design, performance, and versatility. Now re-engineered to meet the latest 2022 building regulations, it’s the perfect solution for modern homes, renovations, and new builds alike.
Slimmer Sightlines – Just 122mm sash-to-sash for a cleaner look and more glass.
Contemporary Aesthetic – Modern square sash design suits stylish, minimalist homes.
Regulations-Ready – Fully compliant with 2022 Building Regs for U-value and energy targets.
Anti-Drop Hinge – Smart bottom hinge prevents sagging, ensuring long-term reliability.
1.2 U-Value with Triple Glazing – Optional 44mm units deliver top-tier thermal performance.
Unlimited Colour Choice – 250+ RAL colours plus 61 exclusive Smart finishes including Sensations.
Flexible Configurations – Multiple layouts, openings, and thresholds to suit any design.
Thermally Broken Aluminium – Superior insulation and weather resistance built in.
Secure by Design – Multi-point locks on all leaves for maximum security.
✅ Perfect for homeowners and developers looking for sleek aesthetics, full compliance, and long-term performance.
Classic Steel-Look Design Meets Modern Aluminium Performance
Bring timeless elegance to your home with the Smart Heritage Bi-Folding Door system — expertly crafted to replicate the iconic heritage ‘steel look’ while delivering the energy efficiency, security, and ease of modern aluminium.
This beautifully engineered system features an authentic heritage-style sash with three transom bars per panel, perfectly suited for traditional homes, industrial-inspired interiors, or period property renovations.
We proudly install aluminium bi-fold doors in:
Amersham, Watford, Pinner, Harrow, Chesham, Little Chalfont, Gerrards Cross, Brent, Stanmore, and surrounding areas in Hertfordshire, Buckinghamshire, and North West London.
Learn More & Get a Quote
📥 Download Brochures & Watch Product Videos to explore configurations, colour options, and technical details.
📞 Contact us today for a 100% no-obligation quote — expert advice with zero pressure.
At 3S Doors, we promise best-in-class customer service and industry-leading turnaround times. From first enquiry to final installation, our team is here to make your bi-fold door journey smooth, personal, and hassle-free.
Looking for beautifully engineered aluminium bi-fold doors at a fair price?
Call us on 02039165359, email us at info@3sdoorsandlocks.co.uk, or request your free quote online.
We’ll guide you through every step — from design advice to installation — with expert knowledge and no pushy sales tactics.
We’re here to make your home improvement journey simple, stylish, and stress-free.
Steel-Look Design – Slim sightlines with vintage-style glazing bars
1.4 U-Value – High thermal efficiency
Quick-Glaze Beads – Fast, clean installation
3 Transom Bars per Sash – Classic heritage appearance
Slim Aluminium Frame – Strong, durable, and low maintenance
Wide Colour Choice – 250+ RAL colours & finishes
Thermally Broken – Energy-saving performance year-round
Ultra-Slim, Ultra-Efficient, Architect-Approved.
The Cortizo Bi-Fold Plus sets a new benchmark in residential aluminium bi-folding doors. With industry-leading sightlines, thermal performance, and size options, it’s the perfect choice for high-spec home improvements, extensions, or architect-designed new builds.
Precision Engineered, Effortlessly Elegant, Installer-Trusted.
The Korniche Aluminium Bi-Fold Door combines sleek aesthetics with exceptional performance. Designed to transform living spaces with uninterrupted views and seamless transitions, Korniche offers ultra-slim sightlines, rapid installation, and outstanding thermal efficiency. Whether you’re upgrading your home, designing a modern extension, or working on a bespoke architectural project, Korniche delivers the perfect balance of style, strength, and simplicity.
✅ Ideal for homeowners seeking style, strength, and advanced security in one ultra-modern system.
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