AluK vs Duraflex Windows
Duraflex Windows
Average Price
£850
AluK
£610
Duraflex Windows
U-Value
1.1 W/m²K
AluK
1.0 W/m²K
Duraflex Windows
Warranty
20.0 years
AluK
12.0 years
Duraflex Windows
Customer Rating
4.5/5
AluK
4.4/5
Duraflex Windows
AluK vs Duraflex Windows: Summary
When comparing AluK and Duraflex Windows windows, several key differences emerge. AluK, established in 1994, offers windows with an average U-Value of 1.1 W/m²K at an average price of £850. Meanwhile, Duraflex Windows windows average 1.0 W/m²K U-Value at £610.
AluK windows come with an average warranty of 20.0 years, compared to Duraflex Windows's 12.0 years. Customer satisfaction ratings show AluK leading with 4.5/5, while reliability scores give AluK a slight edge.
Both manufacturers offer various glazing options and produce windows suitable for different property types. Both are based in United Kingdom.
Detailed Comparison
Who Should Choose AluK
- Tech-savvy homeowners wanting smart glazing features
- Those who prefer to support UK manufacturing
- Homeowners looking for classic casement window designs
Who Should Choose Duraflex Windows
- Those looking for windows with strong performance
Popular Window Models
AluK Popular Models
| Model | Type | Material | Rating | U-Value | Price |
|---|---|---|---|---|---|
| Optio 58BD | Casement | Aluminum | A+ | 1.1 W/m²K | £700 |
| SL52 Sliding | Sliding | Aluminum | A | 1.2 W/m²K | £1000 |
Duraflex Windows Popular Models
| Model | Type | Material | Rating | U-Value | Price |
|---|---|---|---|---|---|
| ResiFront Door | Entrance Door | uPVC | A | 1.1 W/m²K | £950 |
| FlexiSeal Turn | Tilt & Turn | uPVC | A+ | 0.9 W/m²K | £580 |
Approved Installers
AluK Installers
AluK Approved Fabricators
Approved Fabricators
Duraflex Windows Installers
No installer data available
Energy Efficiency & Cost Savings
More energy-efficient windows can significantly reduce your heating bills. Based on average UK energy prices and a typical 3-bedroom house:
AluK
Average U-Value
1.1 W/m²K
Lower is better for heat retention
Energy Rating
A+
Estimated Annual Energy Savings
£327
Compared to older single-glazed windows (typical U-Value 5.8)
Duraflex Windows
Average U-Value
1.0 W/m²K
Lower is better for heat retention
Energy Rating
A+
Estimated Annual Energy Savings
£360
Compared to older single-glazed windows (typical U-Value 5.8)
Frequently Asked Questions
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