Sliding doors aren’t just a trend—they’re one of the most impactful upgrades you can make to your home in 2025. From ultra-slim aluminium frames to large glass panels that maximise natural light, sliding patio doors are now a must-have for modern living.

At Horizon Windows & Doors, we supply premium aluminium sliding doors with fast delivery across the UK. You can even design your sliding door online, get an instant price, and choose flexible Klarna payment options for a smooth buying experience.

In this guide, we cover everything you need to know—from styles and benefits to choosing the right system for your home.

What We’ll Cover

• Why sliding doors are a 2025 essential
• Types of sliding doors we offer
• Benefits of aluminium sliding doors
• Design considerations
• Choosing the right sliding door
• Bifold Doors vs Sliding Doors
• FAQs for homeowners
• Useful internal links

Why Sliding Doors Are a 2025 Essential

Homeowners in the UK are prioritising natural light, energy efficiency, and open-plan living more than ever. Aluminium sliding doors deliver all of this—and more.

Expect 2025 to bring:

• Larger expanses of glass
• Ultra-slim aluminium frames
• Improved thermal performance
• Smart technologies, including integrated blinds
• Automated opening systems

Whether you’re extending, renovating or building new, sliding doors instantly elevate any space.

Explore our full sliding door range

Types of Sliding Doors Offered by Horizon

At Horizon Windows & Doors, we supply a high-performance selection of aluminium sliding doors from Cortizo and Alunet—two leading manufacturers known for superior engineering, slim profiles, and outstanding thermal values.

Cortizo 4700 Sliding Doors

One of the most popular aluminium sliding patio door systems in the UK.

Our available configurations:

• Cortizo 4700 2-Pane Sliding Door

• Cortizo 4700 3-Pane Sliding Door

• Cortizo 4700 4-Pane Sliding Door

• Cortizo 4700 6-Pane Sliding Door

Why homeowners love Cortizo:

• Slim sightlines
• Smooth, reliable sliding
• Excellent thermal insulation
• Wide range of RAL colours

Alunet Aluminium Sliding Doors

Designed for sleek aesthetics and exceptional strength, Alunet sliding doors are perfect for large openings and modern homes.

Available options:

• Alunet Aluminium 2-Pane Sliding Door

• Alunet Aluminium 3-Pane Sliding Door

• Alunet Aluminium 4-Pane Sliding Door

Why choose Alunet sliding doors:

• Ultra-smooth sliding performance
• Strong and secure aluminium frames
• Great thermal values
• Impressive modern look

Benefits of Aluminium Sliding Doors

Aluminium has become the leading material for sliding patio doors, sliding garden doors, and exterior sliding doors in the UK.

1. Durability for UK Weather – Aluminium doesn’t warp, rot or swell. Its natural strength supports larger glass spans than uPVC or timber.
2. Low-Maintenance – A simple wipe-down keeps your frames looking new. Tracks resist debris buildup—ideal for long-term reliability.
3. Exceptional Energy Efficiency – Modern aluminium systems include insulated profiles and double or triple glazing options. This means:Reduced heat loss
   1. Lower energy bills
   2. Comfortable temperatures year-round
   3. Low U-values and improved thermal break technology
4. Sleek, Minimalist Design – Slim frames = more glass + more light. Choose from hundreds of RAL colours, including dual-colour options.
5. Smooth, Effortless Operation – Our sliding doors glide on high-performance rollers for long-term smoothness—no sticking or dragging.

Design Considerations for Your Home

Choosing the right sliding door involves more than just selecting a style.

Opening Size & Layout

• Larger openings suit 3-pane, 4-pane or even 6-pane systems.
• Smaller spaces benefit from 2-pane sliding doors.

You can even explore stacking sliding doors and sliding and stacking doors for ultra-wide openings.

Glazing Options

• Double Glazed – excellent performance
• Triple Glazed Patio Doors – superior insulation & noise reduction

Colour & Finish

• Hundreds of custom RAL colours:
• Matte, textured, gloss, metallic & dual-tone.

Security Features

All models include:

• Multi-point locking
• Toughened safety glass
• Anti-lift mechanisms

Sliding Doors vs. Bifold Doors

Not sure if a sliding door or folding patio door is best?

Choosing between bifold doors and sliding doors depends on the look and functionality you want for your home. Bifold doors are ideal if you want a completely open space that connects your home and garden. When folded back, they create a full, clear opening—perfect for summer gatherings, extensions, and open-plan living. They offer great flexibility too, with options like traffic doors for everyday use without opening the full system.

Sliding doors, however, are the better choice if your priority is maximising natural light and enjoying wide, uninterrupted views all year round. With large glass panels and ultra-slim frames, sliding doors create a modern, spacious feel even when closed. Because the panels glide behind each other, you don’t lose any internal or external space, making them perfect for tighter areas or where furniture placement is important.

In short, choose bifold doors if you want a full wall that opens completely, and opt for sliding doors if you want the biggest glass area, effortless operation and a sleek, contemporary look. Both options offer excellent thermal performance and security—you simply pick the one that best suits your lifestyle and your home’s design.

To find out more information you can explore our full bifold doors range.

If You’re Extending or Building New…

Explore our full product range at Horizon:

• Roof Lanterns:

• Flat Glass Rooflights:

• Windows:

• French Doors:

• Composite Doors:

You can design ANY product online with real-time pricing using our Online Design Tool!

How to Choose the Right Sliding Door for You

1. Assess your opening space
2. Decide number of panes
3. Choose colour and finish
4. Select double or triple glazing
5. Consider hardware, handles or integral blinds
6. Get instant pricing with our design tool

FAQs

How long do sliding doors last?

Up to several decades with basic maintenance.

Are sliding doors secure?

Yes—multi-point locks, toughened glass & anti-lift design come as standard.

How do I maintain aluminium sliding doors?

Clean the frame periodically and keep the tracks free of debris.

How much do sliding doors cost in the UK?

Use our Online Design Tool to get the best price for sliding patio doors instantly.

Ready to Upgrade Your Home?

Whether you’re looking for aluminium sliding patio doors, internal sliding doors UK, or large modern sliders, Horizon has you covered.

• Design online
• Instant pricing
• Pay with Klarna
• UK delivery

Start designing today

Or if you’d prefer to speak with our friendly team Get in touch