uPVC
uPVC Rio Inline Windows
The Rio inline sliding window features an opening sash that sits flush with the outer frame, giving a sleek and seamless appearance. Ideal for rooms where outward-opening windows are not practical — above kitchen worktops, along walkways, or in rooms facing public paths.
Features & Benefits
Flush Fit Design
Opening sash sits flush with the outer frame for a seamless look
Space-Saving Slide
Space-saving horizontal slide operation — no outward projection
Precision Track
Smooth precision track operation for effortless use
Full Colour Range
Full Rehau colours and woodgrains available
Multi-Point Locking
Multi-point locking security as standard
A+ Energy Rating
A+ energy rating with double or triple glazing
Our Installations
Technical Specifications
Frequently Asked Questions
What are Rehau Rio inline sliding windows?
The Rehau Rio is a flush casement inline sliding window with mechanical joints and a heritage timber-look appearance. The sash sits flush with the outer frame, providing a sleek design and space-saving operation.
Is the Rehau Rio Inline a flush fit window?
Yes. The Rio Inline is the horizontal-sliding member of Rehau's Rio flush-fit family, so the opening sash sits level with the outer frame for the same seamless timber-look finish conservation officers look for. The only difference from a hinged Rio flush casement is the operation: the Rio Inline slides sideways rather than swinging outward, which suits openings above kitchen worktops, along walkways, or facing a public path. For the hinged outward-opening version, see our Rehau Rio flush casement windows.
Can I match Rio Inline windows with hinged flush casement windows on the same house?
Yes. Rio Inline and the hinged Rio flush casement share the same Rehau Rio profile family, so the flush sash detail and sightlines match across both. You can fit sliding Rio Inline where an outward swing is not practical and hinged Rio flush casement elsewhere, keeping a consistent heritage appearance across the whole elevation.
Are Rehau Rio windows suitable for conservation areas?
Yes — the Rehau Rio's timber-look design with mechanical joints makes it an excellent alternative to traditional timber windows in conservation areas. Available in heritage colours including Chartwell Green, Anthracite Grey, and Turner Oak.
How do Rio inline windows open?
They slide horizontally along a precision track — no outward or inward projection, making them ideal for restricted spaces.
Are Rio inline windows secure?
Yes — PAS 24 certified with multi-point locking fitted as standard, plus toughened safety glass options.
How energy efficient are they?
Rehau Rio inline windows achieve an A-rated energy rating with multi-chamber profiles and double or triple glazing.
What guarantees do you offer?
The Rehau Rio system — engineered to replicate traditional flush timber casement aesthetics — carries a 10-year manufacturer warranty on profile integrity, mechanical sash joints and heritage-grade colour finishes including Chartwell Green and Anthracite Grey. Vitrum Solutions provides FENSA registration on every Rio installation and adds a 10-year CPA insurance-backed guarantee on the fitting work.
Related Guides
In-depth advice from the Vitrum Solutions blog to help you choose with confidence.
Rehau Rio Flush Casements: UK Buyer's Guide for Conservation Areas (2026)
Buyer's guide to Rehau Rio flush casement windows for UK conservation areas — mechanical-joint corners, Article 4 planning tips, heritage colours, PAS 24 security and 2026 pricing.
ReviewRehau Windows Review UK 2026: TOTAL70, Slinova & Rio — The Complete Range Compared
Honest Rehau range review for UK homeowners — TOTAL70 casements, Rio flush, Slinova inline sliders, A+ ratings, PAS 24 security, weld technology and costs.
GuideFlush Casement Windows UK: Cost, Suitability & 2026 Guide
Flush casement windows sit flat with the frame for a clean, traditional look. This guide covers the difference from standard casements, cost, conservation area rules and whether they are worth the premium.
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