Reynaers SL38 Aluminium Windows

Reynaers Sl38 Aluminium Windows

All about Reynaers SL38 Aluminium Windows

Reynaers SL38 windows create an elegant look that perfectly combines style with functionality. The unique slender look is ideal for modern properties, with the slim aluminium profiles delivering an attractive steel effect.

With the trend for steel windows with slim frames and a lot of glass still going strong, Raynaers’ SL38 windows really deliver. While this old fashioned way of making windows can mean that you get lower levels of performance with lesser brands, the SL38 windows deliver high performance and a great look.

Made with thermally broken aluminium, you get the look of steel but with better performance and an even more elegant design. Even better, with SL38, you get the same appearance as with slimline steel but for half the price.

Tested to the highest standards, Reynaers SL38 windows offer superior insulation properties compared to their steel counterparts. On top of this, the narrow frames provide you with a sleek look and unobstructed views while also allowing as much natural light into your property as possible. It’s easy to see why these windows are increasingly becoming the go-to option for architects.

Designed in Belgium but made in the UK, each window is powder-coated to your choice of colour and can be supplied custom built to your exact sizes and specification.

What You Need To Know

  • Ultra-slim aluminium profiles to give the steel effect
  • Powder-coated to any colour of your choice
  • Double and triple-glazed options available
  • Thermally broken aluminium for great U values
  • Custom built to your size, shape and specification
  • Curved heads available
  • Strong and durable
  • Matching doors and windows available


The SL38 system combines a clean design with hardworking, durable materials to deliver a high level of insulation and reliability. Providing you with improved energy efficiency and noise absorption, these Reynaers windows will also enhance the look of your property.

Thermal insulation: 1,9 W/m2K

Water tightness: 9A (600 Pa)

Wind load resistance: C4 (1600 Pa)

Acoustic performance: 45 (-1,-) dB

Air tightness max. Test pressure: 4 (600 Pa)

Burglar resistance: RC2

Energy level: Super high

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