Window system
REHAU
Mainstream to upper-mainstream, with a strong engineering reputation.
Overview
About REHAU
REHAU is often mentioned in the same breath as VEKA, and for good reason: both are large German systems companies with mature UK supply chains. Homeowners frequently see the two quoted against each other.
The differences that matter to you are usually the range, the external profile shape and the glazing and hardware specification rather than the badge on the profile.
Ownership: German polymer engineering group supplying PVC-U window systems to UK fabricators.
Systems / Ranges
Ranges within this system
Casement ranges
Chamfered and sculptured external appearances depending on the range quoted.
Vertical sliders
Sash-window style options for properties where a slider suits better.
Appearance
External and internal appearance
Casement and sculptured profiles across the range, with flush options in some product lines — the external look varies by range, not by the REHAU name alone.
Window / door types
Products available in this system
- Casement windows
- Vertical sliders
- Door profiles through allied systems
Colour options
Colour and finish
White as standard, with foiled and painted finishes offered by most fabricators; exact swatch choice depends on the fabricator.
Glazing capability
What it can glaze
Designed for standard double- and triple-glazed sealed units; specific maximum thickness depends on the range and sash quoted.
Thermal performance
Thermal performance
Marketed on chambered thermal design. We avoid quoting a single U-value because performance depends on the range and glass unit — ask your installer for the whole-window figure on your specific quotation.
Security
Security
Multi-point locking is standard across quoted ranges. Confirm any specific security standard on the installer's own paperwork rather than assuming it from the brand.
Best suited to
Typical applications
- Replacement windows across most housing types
- Projects wanting a recognised European system
- Vertical slider replacements where appropriate
Things to consider
Strengths and things to consider
Strengths
- Strong engineering reputation and consistent long-term availability
- Widely fabricated, so competitive comparison is straightforward
- Range choice covers both modern and more traditional appearances
Things to consider
- As with any widely fabricated system, the fabricator matters as much as the profile brand
- Ranges differ significantly — a quotation should name the range, not just "REHAU"
Before you sign
Questions to ask an installer
- 01Which REHAU range have you specified?
- 02Is there a flush or sculptured option available in this range?
- 03What is the glass specification, including spacer bar?
The Glazora view
Comparing REHAU with VEKA on brand alone tells you very little. Compare the ranges, the glass, the hardware and the fabricator — that is where real differences appear.
See how REHAU compares directly against another system, or get a quotation based on your own property.
Source / last verified
Where this information comes from
Source: Manufacturer published system literature and trade/fabricator-facing brochures in general circulation.
Last verified: Structure reviewed February 2025 — figures below are qualitative pending direct manufacturer confirmation.
Still needs verification against manufacturer literature:
- Frame depth and sightline figures
- Any specific U-value
- Any PAS 24 / Secured by Design claim not confirmed on the installer's own certification