Britannia Windows vs Rehau
Britannia Windows
Average Price
£820
Britannia Windows
£590
Rehau
U-Value
1.1 W/m²K
Britannia Windows
1.1 W/m²K
Rehau
Warranty
15.0 years
Britannia Windows
10.0 years
Rehau
Customer Rating
4.5/5
Britannia Windows
4.6/5
Rehau
Britannia Windows vs Rehau: Summary
When comparing Britannia Windows and Rehau windows, several key differences emerge. Britannia Windows, established in 1986, offers windows with an average U-Value of 1.1 W/m²K at an average price of £820. Meanwhile, Rehau windows average 1.1 W/m²K U-Value at £590.
Britannia Windows windows come with an average warranty of 15.0 years, compared to Rehau's 10.0 years. Customer satisfaction ratings show Rehau ahead at 4.6/5, while reliability scores give Rehau a slight edge.
Both manufacturers offer smart glazing technology and produce windows suitable for different property types. Britannia Windows is based in United Kingdom, while Rehau originates from Germany.
Detailed Comparison
Who Should Choose Britannia Windows
- Tech-savvy homeowners wanting smart glazing features
- Those who prefer to support UK manufacturing
- Homeowners looking for classic casement window designs
Who Should Choose Rehau
- Homeowners valuing customer satisfaction and after-sales support
- Homeowners wanting access to a wide network of approved installers
- Those looking for windows with exceptional reliability
Scenario Fit: Which Brand Fits Your Situation?
Best for budget-first upgrades
Rehau is generally the lower upfront-cost option in this comparison.
- • Better for large multi-window projects with tighter budget caps
- • Useful when payback speed matters more than premium extras
- • Pair with installer quote comparisons to lock value
Best for long-term ownership
Britannia Windows currently leads on warranty depth in this matchup.
- • Better fit if you plan to stay in the home 10+ years
- • Prioritises lower maintenance surprises over time
- • Stronger risk control for exposed or high-traffic elevations
| Decision Lens | Likely Better Choice | Why |
|---|---|---|
| Upfront budget | Rehau | Lower average price in this pair. |
| Energy performance | Britannia Windows | Lower U-Value typically means stronger heat retention. |
| Maintenance risk framing | Britannia Windows | Longer average warranty can reduce long-tail ownership risk. |
| User-rated confidence | Rehau | Higher customer satisfaction score in current data. |
Popular Window Models
Britannia Windows Popular Models
| Model | Type | Material | Rating | U-Value | Price |
|---|---|---|---|---|---|
| AluBifold 80 | Bifold | Aluminium | A | 1.2 W/m²K | £1,200 |
| ThermoSafe Casement | Casement | uPVC | A+ | 0.9 W/m²K | £650 |
Rehau Popular Models
| Model | Type | Material | Rating | U-Value | Price |
|---|---|---|---|---|---|
| Total70c | Casement | uPVC | A+ | 1.1 W/m²K | £520 |
| Rio Flush Fit | Flush Casement | uPVC | A | 1.2 W/m²K | £570 |
| Geneo | Tilt and Turn | uPVC | A+ | 1.0 W/m²K | £680 |
Approved Installers
Britannia Windows Installers
No installer data available
Rehau Installers
Rehau Authorised Partners
Authorised Partners
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:
Britannia Windows
Average U-Value
1.1 W/m²K
Lower is better for heat retention
Energy Rating
A+
Estimated Annual Energy Savings
£338
Compared to older single-glazed windows (typical U-Value 5.8)
Rehau
Average U-Value
1.1 W/m²K
Lower is better for heat retention
Energy Rating
A+
Estimated Annual Energy Savings
£338
Compared to older single-glazed windows (typical U-Value 5.8)
Frequently Asked Questions
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