We supply and install aluminium windows, bifold doors, sliding doors and heritage glazing across london, south east and home counties.
Call Us Today: 020 341 10038
Email: projects@thefenestrationnetwork.co.uk
Looking for high-performance, stylish aluminium windows in London, South East and Home Counties? You’ve come to the right place. We supply and install bespoke aluminium windows across London and beyond — combining sleek design, thermal efficiency, security and durability.
Premium Aluminium glazing, professionally installed nationwide:
Why Choose Aluminium Windows for London Properties?
London’s climate, architecture, and planning constraints demand windows that perform. Aluminium is a superb choice because:
- Slim sightlines, maximum glass area — less frame, more view
- Excellent durability — no warping, rotting or corrosion
- Strong structural performance — supports large panes, tall designs
- Thermal efficiency — modern thermal break technology enables low U-values
- Low maintenance — minimal upkeep compared to timber or older frames
- Design flexibility — wide selection of finishes, RAL colours, heritage or modern styles
- Security & compliance — compatible with PAS 24 / Secured by Design specifications
These advantages make aluminium windows highly popular with developers, architects, homeowners, and in heritage or conservation areas.
Our London Supply & Installation Service
We don’t just supply aluminium windows — we deliver a full end-to-end service across London and the UK:
- On-site survey & specification — tailored to your property and design vision
- Design & planning support — especially for conservation areas / listed properties
- Manufacture & quality control — in UK, to your exact requirements
- Professional installation — by trained installers, managing tolerances, sealing, finishing
- Aftercare & warranty support — we stand behind our work
We understand London challenges — tight access, building regulations, permits, structural loads. That’s why we handle all the details. Each unit is manufactured to measure, so we ensure a perfect fit, even in London’s challenging streets and building types.
BUILDING & EXTENSIONS, EXPERT INTEGRATION WITH GLAZING
BUILDING SERVICES, EXTENSIONS & ORANGERIES — EXPERTLY INTEGRATED WITH GLAZING
At The Fenestration Network, we provide a comprehensive, end-to-end service that brings every stage of your project together under one expert team. From foundations and brickwork to glazing and finishing, we seamlessly coordinate every trade to guarantee precision, performance, and a smooth experience for you.
We don’t just install glazing — we build around it.
Our integrated approach means the structural and glazing elements are designed and executed to complement one another from the start, delivering:
- Perfect junctions between structure and glass (no leaks, no cold bridges)
- Cohesive design and performance across the entire build
- Faster project delivery with a single accountable team
- Consistent quality control from groundworks to final finish
This joined-up delivery model ensures your orangery, extension, or renovation achieves the best of both worlds: robust construction and high-performance glazing, all delivered by specialists who understand both disciplines.
Our Aluminium Window Range for London
We tailor our aluminium windows to your individual needs. Some of the options and styles we offer include:
- Flush casement & heritage windows — for period or listed houses
- Tilt & turn or side-hung windows — for ventilation flexibility
- Fixed / picture windows — to maximise daylight in tricky apertures
- Oversized / full height windows — to deliver statement glazing
- Slimline / minimal frame profiles — for a modern aesthetic
- Custom glazing (double, triple, acoustic, solar control)
- Dual colour / contrasting internal/external finishes
- Hardware & accessories — e.g. trickle vents, restrictors, security hinges
Each unit is manufactured to measure, so we ensure a perfect fit, even in London’s challenging streets and building types.
WINDOW & DOOR MAINTENANCE PLANS | FENESTRATION NETWORK
Protect your glazing with nationwide window and door maintenance plans. Cleaning, servicing, and performance checks by The Fenestration Network
Your windows and doors are an investment — and like any part of your home, they need regular care to stay secure, efficient, and looking their best.
At The Fenestration Network, we offer nationwide window and door maintenance plans designed to protect your property, reduce long-term repair costs, and keep every installation performing like new.
✅ Extend lifespan of your glazing
✅ Maintain energy efficiency and security
✅ Prevent costly repairs
✅ Keep warranties valid
✅ Ensure your property always looks its best
Book your plan today.
Call us: 020 341 10038 (South) / 01768 254552 (Rest of UK)
Email: maintenance@thefenestrationnetwork.co.uk
SAVE MONEY - WE DELIVER THE WHOLE PROJECT - SUPPLY & INSTALL
AB-38 SLIMLINE SMARTS BIFOLDING DOORS FROM £3250
AB-38 SLIMLINE SMARTS BIFOLDING DOORS FROM £3250
AB-38 SLIMLINE SMARTS BIFOLDING DOORS FROM £3250
ASK FOR OUR WHITE GLOVE PROJECT SERVICE - FULL SUPPLY, SURVEY AND INSTALLATION
Ultra-slim 88mm sightlines
Available with or without Crittal effect
Over 150+ RAL colours to choose from
U-Value: 1.0W/M2K
Available in over 19 configurations
AB-60 Premium smarts bifolding doors FROM £2750
AB-38 SLIMLINE SMARTS BIFOLDING DOORS FROM £3250
AB-38 SLIMLINE SMARTS BIFOLDING DOORS FROM £3250
ASK FOR OUR WHITE GLOVE PROJECT SERVICE - FULL SUPPLY, SURVEY AND INSTALLATION
132mm sightlines
Over 150+ RAL colours to choose from
Upto 20 Years Guarantee
U-Value: 1.4W/M2K
Available in over 19 configurations
AS-20 smarts SLIM 20MM sliding doors FROM £3250
AB-38 SLIMLINE SMARTS BIFOLDING DOORS FROM £3250
cortizo cor vision SLIM 20MM sliding doors FROM £2950
ASK FOR OUR WHITE GLOVE PROJECT SERVICE - FULL SUPPLY, SURVEY AND INSTALLATION
Ultra slim 20mm sightlines (Central mullion)
Soft Close
Over 200+ RAL colours to choose from
Available in 2 or 3 track
1.6 W/m2K U Value
cortizo cor vision SLIM 20MM sliding doors FROM £2950
AB-38 SLIMLINE SMARTS BIFOLDING DOORS FROM £3250
cortizo cor vision SLIM 20MM sliding doors FROM £2950
ASK FOR OUR WHITE GLOVE PROJECT SERVICE - FULL SUPPLY, SURVEY AND INSTALLATION
Sightlines
Frame depth 116 mm / 182 mm 3 rails Sash depth 37 mm
Interlock 20 mm
GS20 CORTIZO SLIM 20MM SLIDING DOORS FROM £3450
AW-47 SMARTS HERITAGE WINDOWS FROM £650 SUPPLIED AND INSTALLED
GB-49 Cortizo bifolding doors FROM £2950 supplied & installed
ASK FOR OUR WHITE GLOVE PROJECT SERVICE - FULL SUPPLY, SURVEY AND INSTALLATION
Slim 20mm sightlines
Standard or Flush Stacking
Over 200+ RAL colours to choose from
1.3 W/m2K U Value
GB-49 Cortizo bifolding doors FROM £2950 supplied & installed
AW-47 SMARTS HERITAGE WINDOWS FROM £650 SUPPLIED AND INSTALLED
GB-49 Cortizo bifolding doors FROM £2950 supplied & installed
ASK FOR OUR WHITE GLOVE PROJECT SERVICE - FULL SUPPLY, SURVEY AND INSTALLATION
110mm sightlines
Over 150+ RAL colours to choose from
Upto 20 Years Guarantee
0.8Wm2K U-Values
Available in upto 14 panes width
AW-47 SMARTS HERITAGE WINDOWS FROM £650 SUPPLIED AND INSTALLED
AW-47 SMARTS HERITAGE WINDOWS FROM £650 SUPPLIED AND INSTALLED
AW-47 SMARTS HERITAGE WINDOWS FROM £650 SUPPLIED AND INSTALLED
ASK FOR OUR WHITE GLOVE PROJECT SERVICE - FULL SUPPLY, SURVEY AND INSTALLATION
Highly practical, affordable range of Aluminium Windows available in a range of colours and designs.
Aesthetically pleasing and simple to install.
GW70 CORTIZO WINDOWS FROM £650 SUPPLIED AND INSTALLED
AW-47 SMARTS HERITAGE WINDOWS FROM £650 SUPPLIED AND INSTALLED
AW-47 SMARTS HERITAGE WINDOWS FROM £650 SUPPLIED AND INSTALLED
ASK FOR OUR WHITE GLOVE PROJECT SERVICE - FULL SUPPLY, SURVEY AND INSTALLATION
Highly practical, affordable range of Aluminium Windows available in a range of colours and designs.
Aesthetically pleasing and simple to install.
AD-55 SMARTS HERITAGE FRENCH doors FROM £1850
AD-55 SMARTS HERITAGE FRENCH doors FROM £1850
AD-55 SMARTS HERITAGE FRENCH doors FROM £1850
ASK FOR OUR WHITE GLOVE PROJECT SERVICE - FULL SUPPLY, SURVEY AND INSTALLATION
Door leaves up to 3m high
Stunning Heritage (Crittal effect)
Can be used external and internal
Inward or outward opening
Alitherm 400 windows from £600
AD-55 SMARTS HERITAGE FRENCH doors FROM £1850
AD-55 SMARTS HERITAGE FRENCH doors FROM £1850
ASK FOR OUR WHITE GLOVE PROJECT SERVICE - FULL SUPPLY, SURVEY AND INSTALLATION
Highly practical, affordable range of Aluminium Windows available in a range of colours and designs.
Aesthetically pleasing and simple to install.
smarts signature doors from £1950
AD-55 SMARTS HERITAGE FRENCH doors FROM £1850
ALUSPACE INTERNAL DOORS AND SCREENS FROM £1450
ASK FOR OUR WHITE GLOVE PROJECT SERVICE - FULL SUPPLY, SURVEY AND INSTALLATION
Fresh, vibrant designs.
Our range of Entrance doors are excellent quality, available in a variety of styles.
Quick lead times and a dream to install.
ALUSPACE INTERNAL DOORS AND SCREENS FROM £1450
AD-55 SMARTS HERITAGE FRENCH doors FROM £1850
ALUSPACE INTERNAL DOORS AND SCREENS FROM £1450
ASK FOR OUR WHITE GLOVE PROJECT SERVICE - FULL SUPPLY, SURVEY AND INSTALLATION
Explore Aluspace internal doors and screens – slim, stylish steel-look glazing from Smart Systems, designed to transform modern homes.
WINDOW AND DOOR SYSTEMS BY THE FENESTRATION NETWORK
CORTIZO, SMARTS, ALUMIL, ALUNET, SCHUCO & ASTON ARCHITECTURAL - THE BEST ALUMINIUM WINDOWS AND DOORS, PROFESSIONALLY INSTALLED
At Fenestration Network, we work with the UK’s leading system companies and manufacturers to provide homeowners with the very best in aluminium windows and doors.
Our expertise spans decades in the glazing industry, giving us a complete understanding of how each system performs, what makes it unique, and where it fits best.
Whether you’re looking for architectural aluminium sliding doors, precision-engineered bifolds or beautifully crafted front doors, we've got you covered.
10% off all orders placed before 30th November 2025
Applicable only to orders resulting from new quotes produced from 15th October to 30th November, must include full supply, survey and installation and must include any combination of the below:
Windows/ Bi Folding Doors/ Sliding Doors/ French Doors/ Entrance Doors/ Windows/ Garden Studios, Glass Balustrades, Orangeries.