• Super-Slim Sightlines at a Super-Slim Price

    Reynaers SL68 is our stunning new window system with just 65mm frame Outer-to-Sash and very low prices.

Reynaers SL68 is a Cost-Effective Premium Aluminium Casement Window with Super-Slim Slightlines

Great Energy Performance

SL68 gives you the choice of Standard or HI insulation levels – with U-Values down to 1.5 w/m2K with Double Glazing, and fantastic Water and Wind performance.

Super-Slim Sightlines

With sightlines of just 65mm Outer-to-Sash, and 110mm from Sash-to-Sash – SL68 beats most other systems hands down.

Designed for the UK

SL68 is designed exclusively for UK homes, optimised to provide maximum daylight for smaller windows up to 1,200mm x 1,200mm.

Unbeatable Pricing

Despite being the slimmest casement window available on the market, and manufactured in the UK from premium aluminium, SL68 prices are around 25% lower than Eco System windows.

  • Great choice of design options

  • Industry-leading thermal insulation & weather resistance

  • Available with Secure By Design certification

  • Enhanced security with hinge-side security brackets

  • Multi-point locking system for extra security

  • Available with double-glazing and triple-glazing

  • Available with internal or external glazing

  • Easy-clean hinges (optional)

  • Trickle vents (optional)

  • Choose between 4 different sill options

  • Dual-colour option – different colour inside and out

  • Adjustable corner profiles for bay windows

* Above specifications may not all be standard – some are optional extras


Maximum Width (Side-hung)


Maximum Height (Side-hung)


Maximum Width (Top-hung)


Maximum Height(Top-hung)

Reynaers SL68 Slimline Aluminium Windows Open Space Aluminium

65mm Sightline from Outer to Vent


A Rated Window – even with Double Glazing


Internally beaded vent

Technical Specifications
U Value• Down to 1.1W/m2k (Triple Glazing)
• Down to 1.5W/m2k (Double Glazing)
AirClass 4, 600pa
WindClass AE, 2400pa
Document LCompliant


Contact us today for more information and a free, no-obligation quotation

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SL68 Gallery