Compare aluminium doors from Smart and Cortizo — see styles, prices, and performance. Design your aluminium door online with GFD Homes.
What You’ll Learn:
- How Smart and Cortizo systems compare for design, insulation, and value
- Which aluminium doors perform best for front, French, and luxury applications
- What to consider when choosing your aluminium door, from security to thermal performance
- Why buying your aluminium door direct from GFD Homes protects your warranty and pricing
(Estimated Reading Time: 5-6 Minutes)
Introduction: Strong, Sleek, and Built to Last
If you’re thinking about upgrading to an aluminium door, you’re not alone. Aluminium doors have become the go-to choice for homeowners who want durability, sleek style, and low maintenance — all in one package.
From elegant Smart Signature entrance doors to Cortizo’s slimline glazed designs, aluminium delivers the perfect mix of strength and sophistication. But with so many systems out there, it’s hard to know which is right for your project.
This guide compares the top options — Smart Signature, Alitherm 400, and Cortizo — side by side, so you can confidently choose the right aluminium door for your home.
Aluminium Doors Comparison Matrix
| Brand | From Price | Door Type | U-Value | Frame Depth | Security Rating | Colour Options | Style Range | Warranty |
| Smart Signature Composite | £1,454 | Front / Entrance | 1.3 W/m²K | 75 mm | PAS 24 / SBD | 200+ RAL + dual | 50+ | 10 Years |
| Smart Alitherm 400 | £1,312 (single) / £1,695 (French) | Glazed / French | 1.5 W/m²K | 70 mm | PAS 24 | 200+ RAL | Multiple | 10 Years |
| Cortizo Aluminium | £1,500 | Slimline / Entrance | 1.3 W/m²K | 70 mm | PAS 24 | 100+ RAL | Contemporary | 10 Years |
Example Products and Live Prices
| Brand | Example Product | Live Price | View Product |
| Smart Signature | Millbrook Aluminium Composite Door | £1,454 | View Smart Signature Doors › |
| Smart Alitherm | Alitherm 400 Aluminium Glazed Door | £1,312 | View Alitherm Doors › |
| Cortizo | Cortizo Slimline Door | £1,500 | View Cortizo Range › |
Aluminium Doors: The Best For Comparison
Best for Front Entrance Style:
Smart Signature – Combines the luxury of an aluminium exterior with the insulation of a composite core. Over 50 design styles and a wealth of colour and hardware options.
Best for French & Glazed Doors:
Smart Alitherm 400 – Robust yet elegant, available as single or double doors with matching side panels. Perfect for connecting kitchen-diners to patios.
Best for Slim Frames and Modern Design:
Cortizo – With narrow sightlines and a continental design ethos, Cortizo brings architectural finesse to UK homes.
Best for Thermal Efficiency:
Smart Signature & Cortizo – Both achieve 1.3 W/m²K, keeping homes warmer and reducing energy bills.
Best for Colour Choice:
Smart (Signature & Alitherm) – Over 200 RAL finishes, dual colour options, and textured coatings for marine-grade durability.
Best for Value:
Smart Alitherm 400 – Excellent performance for the price, with flexibility across multiple configurations.
Best for Architectural Homes:
Cortizo – Premium aesthetics and precision-engineered hardware for luxury builds.
Best Overall Performer:
Smart Signature – The perfect balance of design flexibility, thermal performance, and value — ideal for front doors or statement entrances.
Key Buying Considerations
- Purpose of the Door:
- Front or Entrance Door? → Smart Signature.
- French / Rear Door? → Alitherm 400.
- Luxury Architectural Finish? → Cortizo.
- Security:
All doors meet PAS 24 standards, but Smart Signature’s composite core adds an extra layer of rigidity and strength.
- Thermal Efficiency:
Smart Signature and Cortizo lead on energy performance, while Alitherm still exceeds building regulations comfortably.
- Design Aesthetic:
- Contemporary builds → Cortizo.
- Period or mixed-style homes → Smart Signature.
- Garden or kitchen connections → Alitherm French.
- Budget:
For value, Alitherm wins. For high-end design, Cortizo. For the perfect in-between, Smart Signature.
Why Order Aluminium Doors Direct from GFD Homes
When you buy direct, the warranty and purchase rights are in your name.
If your contractor buys, the warranty belongs to them — and you’ll depend on them for any future service calls or replacements.
Ordering from GFD Homes means:
- Transparent, instant online pricing
- Full manufacturer warranty protection
- UK-wide delivery and aftercare
- Support from real product experts
No hidden costs, no middlemen — just confidence that you’ve bought the right door from the right people.
Aluminium Doors – Instant, Accurate Online Pricing
Design, configure, and price your aluminium door instantly online:
- Smart Signature Aluminium Composite Doors ›
- Smart Alitherm 400 Aluminium Doors ›
- Cortizo Slimline Doors ›
All prices are calculated to the millimetre, giving 100% accurate quotes instantly.
Summary: Aluminium Doors – Premium Looks, Proven Performance
You now know:
- Which door fits your home’s layout and purpose.
- How Smart, Alitherm, and Cortizo compare for efficiency and style.
- Why buying direct with GFD Homes keeps your warranty safe and your pricing transparent.
Whichever you choose, aluminium doors offer unbeatable strength, modern looks, and thermal performance that stands the test of time.
👉 Compare and design your aluminium door today ›
🛒 Browse the full collection at www.gfdhomes.co.uk
📞 Or call 01642 309576 for expert guidance and a no-pressure quote.
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Aluminium Doors FAQ’s
1. Are aluminium doors energy efficient?
Yes — top models like Smart Signature and Cortizo achieve U-values as low as 1.3 W/m²K.
2. What makes aluminium doors better than uPVC?
Aluminium doors are stronger, slimmer, longer lasting, and available in a wider range of colours and finishes.
3. Which aluminium door is best for a front entrance?
The Smart Signature range offers the best blend of security, insulation, and customisation.
4. Can I get an aluminium French or patio door?
Yes — Smart Alitherm 400 and Cortizo ranges both offer French, glazed, and slimline patio configurations.
5. Can I design my aluminium door online?
Absolutely — use GFD Homes’ online configurator for live, millimetre-accurate pricing and instant design options.
