SL 68 Slim Frame Aluminium Windows

Avoid the doubt with Reynaers’ SlimLine 68 window system. Specifically designed to meet the demand for an outward-opening window with ultra slim profiles.

Particularly suited to use in residential properties, this window maximises the glass area to let in lots of natural daylight. The slim frames and clean lines make this window ideal for both contemporary and more traditional properties, as the design of the window mimics the sight lines of the original steel-framed windows. Its 68mm frame depth makes it perfect as a replacement window as it usually fits within the existing plaster line.

SlimLine 68 vents can be glazed from the inside as well as the outside, and are available on a standard and a HI insulation level.

You can relax with SlimLine 68, knowing you’ve chosen the best in quality, security, and efficiency – avoiding any doubt.

  • Features
  • Style options
  • Downloads
  • Technical information
  • Opening options
  • Energy Efficiency


The SlimLine 68 window was designed by a highly experienced team of engineers at Reynaers’ purpose built, world class design and testing facility. As with all Reynaers products, this window has been put through the most stringent test regime, ensuring that it is one of the highest-performing and most reliable windows available.

  • Huge range of design options
  • Ultra slim frame
  • Double- and triple-glazed options
  • Easy clean egress hinge option
  • Strong and durable
Low maintenance
  • Secured by Design accreditation
  • Window Energy Rating up to A++
  • U-value as low as 1.1W/m2K



Min. Visible width frame: outward opening

15 mm

Min. Visible width frame-vent: outward opening

65 mm

Min. Visible width T-profile

50 mm

Max. height vent

1500 mm

Max. width vent

1200 mm

Overall system depth frame

68 mm

Overall system depth vent

68 mm

Rebate height

18 mm

Min. Glass thickness

26 mm

Max. Glass thickness

43 mm

Min. Glass thickness vent

26 mm

Max. Glass thickness vent

43 mm

Glazing method

Dry glazing with EPDM or neutral silicones

Thermal break

Omega Shaped Fibreglass



  • Air tightness max. test pressure

    4 (600 Pa)

  • Water tightness

    E1200 (1200 Pa)

  • Wind load resistance

    Exxx (>2000 Pa)

  • Acoustic performance

    47(-2;-7) dB


  • Burglar resistance

    Burglar resistance PAS 24


  • Thermal insulation

    (Uf) 1,4 W/m²K

Opening options

Outward opening


Style options

All Reynaers windows and doors are made to meet your exact requirements. From the design and size of the window to the colour of the frame and handle, there are almost unlimited options. When you choose Reynaers at Home, you can make your windows and doors truly individual, a design statement to be proud of.

  • SL 68 Standard Corner

  • SL 68 Flush Corner

Energy Efficiency



  • Thermal insulation

    (Uf) 1,4 W/m²K

Visit our Energy Efficiency page for more information

Learn more

Visit our virtual showroom or find a Reynaers at Home Partner near you

You can now visit the Reynaers Showroom any time you like, with our brand new 360° showroom tour featuring our most popular products. We also have a network of dealers throughout the UK that can advise on product choice and installation for any of the Reynaers at Home aluminium systems for your home project.



Your style deserves to shine through, even in the smallest of details. That is why we offer over 900 RAL colours in various finishes to create the perfect final touch for your aluminium glazing. Combine your favourite colour with a metallic, anodised, matt, gloss, wood look or even a special low-maintenance and scratch-resistant coatex finish.

With an inspired range, you can choose from the latest colour trends as well as the timeless classics.