Rehau vs Veka: Which uPVC Window System Is Better? (UK 2026)

If you are specifying new uPVC windows for a UK home, the premium-tier decision usually comes down to two German engineering houses: Rehau and Veka. Both have operated in the UK market for over 30 years, both supply profiles to thousands of approved fabricators, and both achieve the energy ratings, security certifications and warranty cover that premium installations demand. So which is actually better for your home? This head-to-head comparison breaks down every factor that matters, including a transparent note on which one we install and why.

Quick Decision Frame

Choose Rehau if you want clean welded corners with factory-integrated EPDM gaskets pre-fitted into the profile, need a flush-casement system with a mechanical-joint corner option for a conservation area (Rehau Rio is the standout), or want an inline-sliding patio door system to match (Rehau Slinova). The Rehau range covers the buyer who values long-term frame integrity and a coherent single-brand specification across casements and sliding doors.

Choose Veka if your fabricator already specialises in Veka Matrix 70 or Halo systems, the price quoted is meaningfully lower for an equivalent specification, or you want a uPVC vertical sliding sash via the Halo Vertical Slider. Veka has a larger UK fabricator network and UK extrusion in Burnley, which gives shorter lead times for volume work.

Either works for Building Regulations compliance, A+ Window Energy Ratings, PAS 24 security as standard, 10-year profile guarantees, and FENSA-certified installation. The engineering peers are close enough that on paper you would not feel the difference for the first 10 years of ownership.

Company Background

Rehau

Rehau is a German polymer engineering company founded in 1948 in Rehau, Bavaria. They are one of the largest uPVC profile extruders in Europe, supplying systems to construction, automotive and industrial markets in more than 50 countries. In the UK, Rehau profiles are used widely and are fabricated by a network of approved partners.

Rehau's residential uPVC range is engineered for premium long-term performance. The TOTAL70 system uses a 70mm 5-chamber profile with steel reinforcement zones, factory-integrated EPDM gaskets pre-fitted into the profile (so there is no separate gasket to shrink or fall out over time), and a co-extruded recycled-content variant called TOTAL70c that contains up to 75% post-consumer recycled material per the published Rehau brochure. The Rio flush-casement variant offers mechanical-joint corners as an option — a detail that matters for conservation areas where welded corners are harder to justify to planning officers.

Veka

Veka is a German uPVC systems company headquartered in Sendenhorst, founded in 1969. They are one of the world's largest uPVC profile manufacturers, with major operations across Europe, the US and Asia. In the UK, Veka operates from a manufacturing facility in Burnley, Lancashire, meaning their UK profiles are extruded domestically rather than imported.

Veka's UK brand structure runs across three families: VEKA (the Matrix 70 / M70 casement system), Halo (Halo System 10 casement, Halo FlushSash, Halo Fully Reversible and Halo Vertical Slider), and OMNIA (Veka's design-led brand). Veka also offers the Imagine bi-fold door range as a separate product line. The brand's UK scale and short supply chain are real advantages for fabricators who value lead-time certainty and replacement-part availability a decade after installation.

Thermal Performance: Head to Head

Thermal performance is measured by U-value, the rate of heat loss through the window. Lower values mean better insulation. UK Building Regulations Part L requires a maximum U-value of 1.4 W/m²K for replacement windows, or a Window Energy Rating (WER) of band C.

Casement Windows

| Metric | Rehau TOTAL70 | Veka Matrix 70 / M70 | |---|---|---| | Frame depth | 70mm | 70mm | | Chambers | 5-chamber multi-chamber with steel reinforcement zones | Multi-chamber with steel and aluminium reinforcement sections | | Whole window U-value (double glazing) | from 1.2 W/m²K | from 1.2 W/m²K | | Whole window U-value (triple glazing) | down to 0.8 W/m²K | down to 0.9 W/m²K | | Energy rating (double glazing) | A+ standard | A standard, A+ achievable | | PAS 24 security | Standard | Standard | | UK manufacture | European extrusion, UK fabrication | Extruded in Burnley, UK fabrication |

Heritage and Flush Casement Variants

| Metric | Rehau Rio (flush) | Veka Halo FlushSash | |---|---|---| | Frame depth | 70mm | 70mm | | Corner joints | Mechanical-joint corner option available (timber-look corners) | Welded corners standard | | Whole window U-value | from 1.4 W/m²K (double) | from 1.4 W/m²K (double) | | Conservation area suitability | Strong: mechanical-joint corners accepted by most planning authorities | Subject to planning officer discretion — welded corners are less consistently accepted on Article 4 properties |

Result: Headline thermal performance is effectively tied at 1.2 W/m²K with double glazing. Rehau edges Veka on heritage credentials, since the Rio's mechanical-joint corner option is a meaningful aesthetic and planning-acceptance difference for conservation areas where welded-corner alternatives are harder to justify.

Sightlines Comparison

Sightlines — the visible width of frame around the glass — affect both aesthetics and the natural light entering the room.

| Product | Rehau | Veka | |---|---|---| | Standard casement (frame face) | TOTAL70 — 70mm sightline | Matrix 70 / M70 — 70mm sightline | | Flush casement (corner detail) | Rio — mechanical-joint corner option (timber-look) | Halo FlushSash — welded corners | | Vertical sliding sash | Rehau heritage sash | Halo Vertical Slider |

Result: Sightlines are visually comparable across the standard casement line. The Rio's mechanical-joint corner option is a meaningful aesthetic advantage on heritage-look installations; the Halo Vertical Slider and Rehau heritage sash are closer to tied on the vertical-slider category.

Cost Comparison

The two systems are priced as engineering peers, but installer pricing on Veka often runs slightly lower because Veka's UK fabricator network is larger and the supply chain is shorter (Burnley-based extrusion vs Rehau's distribution from European facilities). Figures below reflect typical 2026 UK installed pricing observed on residential quotes; final pricing varies by fabricator, glass specification and project complexity.

| Product (Typical installation) | Rehau Installed | Veka Installed | Difference | |---|---|---|---| | Standard casement (1200x1200mm, white) | £500 to £750 | £450 to £700 | Rehau 5–10% premium | | Anthracite Grey casement (1200x1200mm) | £600 to £850 | £550 to £800 | Rehau 5–10% premium | | Flush casement, Chartwell Green (1200x1200mm) | £700 to £900 | £600 to £800 | Rehau 10–15% premium | | Bay window (3-section, 2.4m wide) | £1,800 to £2,400 | £1,650 to £2,200 | Rehau 8–10% premium | | Full house (3-bed semi, 8 windows, white) | £4,500 to £6,500 | £4,000 to £6,000 | Rehau 10% premium |

The 5-15% Rehau premium reflects the higher engineering specification — factory-integrated EPDM gaskets, the heritage-grade Rio mechanical-joint corner option, and the TOTAL70c high-recycled-content variant. Whether the premium is worth it depends on how long you plan to stay in the property. Over a 20-year ownership horizon, the additional gasket integration and corner-detail integrity on Rehau profiles typically pays for itself through reduced maintenance and longer service life.

Security: PAS 24 and Beyond

Both systems are PAS 24:2022 certified as standard, which is the UK security benchmark for replacement windows. PAS 24 requires testing against forced entry, lock-attack and frame-leverage methods specified by Secured by Design.

| Security feature | Rehau TOTAL70 | Veka Matrix 70 / M70 | |---|---|---| | PAS 24:2022 | Standard | Standard | | Multi-point locking | 4+ locking points standard | 4+ locking points standard | | Internal beading | Yes — glass cannot be removed from outside | Yes — glass cannot be removed from outside | | Reinforcement | Steel reinforcement zones | Steel and aluminium reinforcement sections per NBS product spec | | Anti-lift hardware | Standard | Standard |

Result: Both meet PAS 24 with identical practical outcomes. The reinforcement approaches differ in detail rather than capability, and the security difference is negligible for standard residential apertures. Choose your installer at least as carefully as you choose your profile.

Product Range

Rehau Range - **TOTAL70** — standard premium casement (the volume system) - **TOTAL70c** — co-extruded variant with up to 75% post-consumer recycled content - **Rio** — flush casement with mechanical-joint corner option for heritage and conservation - **Slinova** — inline sliding patio doors (80mm frame depth, 54mm sash depth, 2/3/4 pane configurations, up to 4m wide × 2.4m high; the SLINOVA X variant extends to 4.9m) - **Rehau heritage sash** — vertical sliding sash for period properties - **Rehau composite door range** — composite entrance doors built on Rehau frames

Veka Range - **VEKA Matrix 70 / M70** — standard premium casement (the volume system) - **Halo System 10** — Halo-brand casement system - **Halo FlushSash** — Halo-brand flush casement with welded corners - **Halo Fully Reversible** — full-reversal casement for high-rise and access-restricted installations - **Halo Vertical Slider** — vertical sliding sash - **OMNIA** — Veka's design-led brand - **Imagine Bi-fold** — aluminium-look uPVC bi-fold door range

Result: Both ranges are comprehensive. Rehau's heritage credentials are stronger thanks to the Rio's mechanical-joint corner option and a matched inline-sliding patio door (Slinova) at the same engineering tier. Veka's depth is in casement variants and the Halo Fully Reversible system, with the Imagine Bi-fold range as a separate aluminium-look option. For a buyer who wants matched casements and inline sliders from one brand, Rehau's Slinova is a meaningful differentiator; for a buyer who values vertical-sliding sash specifically, the Halo Vertical Slider is a refined option.

Warranty and UK Installer Network

Rehau - 10-year profile guarantee from Rehau (covers warping, discolouration, structural failure) - Approved fabricator network across the UK — quality and training audited - Fabricator installation guarantee separate (typically 10 years, CPA insurance-backed)

Veka - 10-year profile guarantee from Veka (equivalent terms) - Larger UK fabricator network (Burnley extrusion serves UK demand directly) - Easier sourcing of replacement parts a decade after installation - Fabricator installation guarantee separate (typically 10 years, CPA insurance-backed)

Result: Headline warranty terms are equivalent. Veka's larger UK fabricator network is a practical advantage for replacement parts and warranty servicing at the 10-15 year mark. Rehau's approved partner audits are more rigorous, which can be a quality signal at point of purchase.

Which Should You Choose?

Choose Rehau If: - Long-term frame integrity matters and you want factory-integrated EPDM gaskets that do not separate from the profile over time - You need flush-casement uPVC for a conservation area — the Rio's mechanical-joint corner option is the closest uPVC equivalent to timber - You want a matched inline-sliding patio door (Slinova) alongside your casements — one brand across the whole installation - Recycled content matters to you — the TOTAL70c variant is brochure-confirmed up to 75% post-consumer recycled - Your installer is a Rehau Approved Partner — the audit process raises the quality floor

Choose Veka If: - Price is the deciding factor — Veka typically runs 5-15% lower for equivalent specifications - You need a vertical sliding sash specifically — the Halo Vertical Slider is one of the most refined uPVC sashes in the UK market - Your fabricator already specialises in Veka — installer experience with the system matters as much as the profile itself - You want a fully reversible casement — the Halo Fully Reversible is purpose-built for that - Volume sourcing reliability is important — Veka's UK extrusion gives short, predictable lead times

Installation in the UK: Why We Picked Rehau

We are transparent about which system we install. Vitrum Solutions installs Rehau systems exclusively across Buckinghamshire, Berkshire, West London, Hertfordshire, Oxfordshire, Surrey and Hampshire. We do not install Veka.

When we audited the premium uPVC market for our customer profile, three factors put Rehau ahead:

1. Factory-integrated gaskets. Our typical customer plans to stay in their home 15-25 years. Gasket integrity matters at that horizon. Rehau's EPDM gaskets are pre-fitted into the profile during extrusion rather than inserted as a separate component, which means there is no gasket to shrink, fall out or require replacement over the life of the window. 2. Rio mechanical-joint corner option for conservation areas. A significant share of our work is in Beaconsfield, Marlow, Amersham Old Town, Windsor and other Article 4 / conservation-area locations. The Rio's mechanical-joint corner detail is what gets uPVC approved by conservation officers when timber is not viable. Veka Halo FlushSash uses welded corners as standard, which is less consistently accepted on Article 4 properties. 3. Slinova matched inline sliders. When a customer wants casements plus a rear-extension patio door, having one premium profile system (Rehau TOTAL70 casements + Rehau Slinova inline patio door) gives a single colour-match, a single weld signature and a single warranty path. The Slinova reaches up to 4m wide × 2.4m high in standard configuration (4.9m on the SLINOVA X variant), which handles most rear-extension openings without structural lintel changes.

That is why our standard uPVC specification is Rehau TOTAL70 for casements, Rehau Rio for flush casements and heritage installations, and Rehau Slinova for inline sliding patio doors. Every Rehau installation we complete carries FENSA certification, a 10-year insurance-backed guarantee through CPA, and the Rehau 10-year profile guarantee.

If you would value a head-to-head walk-through of Rehau against your existing Veka quote, book a free survey — we will produce a comparable like-for-like specification so you can see exactly what each system delivers.

Frequently Asked Questions

Is Rehau cheaper than Veka?

No, Rehau is typically 5-15% more expensive than Veka for equivalent specifications. The premium reflects Rehau's higher engineering investment in factory-integrated EPDM gaskets, the heritage-grade Rio mechanical-joint corner option, and the TOTAL70c high-recycled-content variant. Whether the premium is worth it depends on your ownership horizon: over 20+ years, the gasket integration and corner-detail integrity on Rehau typically offsets the upfront cost through reduced maintenance.

Are Rehau windows more thermally efficient than Veka?

No, the two systems are effectively tied at the headline Uw 1.2 W/m²K figure for whole-window double-glazed performance. Both achieve A+ Window Energy Ratings with standard double glazing on triple-glazed upgrades. Both use multi-chamber profiles with steel reinforcement. The day-to-day thermal experience for a homeowner is identical.

Which has better security, Rehau or Veka?

Both are PAS 24:2022 certified as standard, which is the UK security benchmark, and both ship with multi-point locking and internal beading. Rehau uses steel reinforcement zones; Veka M70 uses steel and aluminium reinforcement sections per the NBS product spec. For standard residential apertures the security outcome is identical; the choice of installer matters more than the profile.

Can I mix Rehau and Veka windows in one project?

Technically yes, but we strongly recommend against it. The two systems use different colour foils, different gasket profiles and different hardware suppliers, meaning colour-match, weather-seal continuity and warranty paths all diverge. If you want premium uPVC across a project, pick one system and stick with it. At Vitrum Solutions, we standardise on Rehau across every job for exactly this reason.

Which brand do UK installers prefer?

It depends on the installer profile. Trade-merchant volume installers often prefer Veka because of UK-based extrusion in Burnley, shorter lead times, and a larger approved-fabricator network. Premium specialist installers more commonly choose Rehau for heritage credentials (Rio mechanical-joint corners), gasket integration, and the matched Slinova inline-sliding patio door. Architect-specified residential projects in conservation areas tend to specify Rehau Rio for the mechanical-joint corner detail. For most UK homeowners, the choice of installer matters more than the choice of profile; both systems perform equivalently when fitted correctly.