Rehau TOTAL70 vs Slinova Windows: Which uPVC System Is Right?

Rehau's uPVC range covers more than one profile, and TOTAL70 and Slinova are the two systems homeowners most often ask us to compare. Both are supplied and installed by us across West London, and each suits a slightly different brief. This guide sets out where they overlap and where the choice actually matters.

The Systems at a Glance

TOTAL70 is Rehau's mainstream 70mm-build uPVC casement system, chosen for the balance it strikes between thermal performance, security hardware and price across a standard replacement or new-build project. Slinova is built around a slimmer sightline, aimed at homeowners who want a uPVC window that reads closer to an aluminium or timber frame without moving to a different material altogether.

Both systems share the same underlying Rehau engineering and multi-chamber construction, so the choice between them is less about quality and more about which visual and performance profile fits your project.

Sightlines and Frame Appearance

This is the main point of difference. Slinova is designed to sit among the slimmest uPVC frames we fit, narrowing the visible frame width so more of the opening is glass. TOTAL70 uses a more conventional casement profile, which is a familiar look on most UK streets and blends in on a like-for-like replacement.

If the priority is maximising glass area on a modern extension or a contemporary rebuild, Slinova is the stronger fit. If the priority is a straightforward, well-proven casement that matches the character of an existing property, TOTAL70 is usually the simpler choice.

Thermal Performance

Both systems are built to the same UK performance benchmarks and reach an A-rated energy category on a typical specification, with the exact figures confirmed at survey once glazing and hardware are chosen. Neither profile has a fixed thermal advantage over the other; the glazing unit and installation detailing generally matter more than which of the two frames is chosen.

Security and Hardware

TOTAL70 and Slinova both take Rehau's standard multi-point locking hardware, and both meet the security expectations of a modern uPVC casement window. Neither system compromises on hardware to achieve its sightline, so security is not a factor in choosing between them.

Colour and Finish Options

Both ranges are available in a wide choice of foiled finishes, including woodgrain effects and solid colours, so colour choice is not a reason to prefer one system over the other. What differs is how the finish reads against the slimmer Slinova frame, which some homeowners feel shows off a bold colour more clearly than a wider casement.

Which We Recommend

For a period property, a straightforward like-for-like replacement, or a budget-conscious project, TOTAL70 is the sensible default and the system we specify most often. For a contemporary extension, a full rebuild, or anywhere the brief calls for maximum glass and the slimmest uPVC sightline available, Slinova is worth the conversation at survey.

We supply and install both Rehau TOTAL70 and Slinova across West London. Every installation is FENSA registered and carries a 10-year CPA insurance-backed guarantee.

Frequently Asked Questions

Is Slinova more expensive than TOTAL70?

Slinova typically sits at a higher specification tier than TOTAL70 because of its slimmer profile and finish options, though the exact difference depends on the size, configuration and glazing chosen for your project. We do not publish pricing online; get an accurate figure from a survey.

Can I mix TOTAL70 and Slinova windows on the same property?

It is possible, but we generally recommend one system across a property for a consistent sightline and finish. Where a project has a mix of period and contemporary elevations, this is worth discussing at survey.

Which Rehau system has the slimmest frame?

Slinova is built specifically for a slimmer sightline than TOTAL70, and sits among the slimmest uPVC window frames we fit. TOTAL70 uses a more conventional casement profile.

Are both systems suitable for conservation areas?

Both can be specified with finishes and detailing suited to conservation area requirements, though acceptability depends on your local planning authority. We recommend checking with your council or discussing this with us before ordering.

Do TOTAL70 and Slinova windows come with the same guarantee?

Yes. Every Rehau installation we carry out, whether TOTAL70 or Slinova, is FENSA registered and backed by the same 10-year CPA insurance-backed guarantee.