SL 38 Windows & Doors

Reynaers SL 38 windows and doors have been designed to replicate the ‘steel look’ or crittal style used in many traditional UK homes. The SL 38 offers the highest levels of performance with excellent levels of security, weather resistance and thermal insulation.
With its slender look, the SL 38 is the perfect window and door for modern homes as well as for the renovation of steel-frames, where respecting the original design is of utmost importance.
Warm and cosy
The SL 38 system is designed to offer class-leading insulation levels without compromising on the appearance of the window. The result is a window that will keep heat loss through the window to a minimum, withstand the worst that the British weather has to throw at it, and will help keep your energy bills down.
• Industry-leading thermal insulation
• Double or triple glazed options
• Unique thermal profiles
• U-value as low as 1.4 W/m2K
Safe and secure
Reynaers SL 38 windows and doors are designed and tested to the most stringent security standards. Knowing that the window has been awarded the Secured by Design accreditation means you can rest assured that your home, your family and your prized possessions are as safe as can be from would-be intruders.
• One of the most secure windows available
• PAS 24
• Secured by Design
• Multi-point locking mechanism
• Lockable handle
Sleek and elegant
With its minimalistic frame and slimline profiles, Reynaers SL 38 combines elegant design and stability with market-leading energy efficiency.
The SL 38 system is available in three very different minimalistic design variants, Classic, Ferro and Cubic; to perfectly match the architectural aspects of your home. These beautiful windows and doors can be provided with double or triple glazing without losing the slender appearance.




Tried and tested
SL 38 windows and doors have been designed by a highly experienced team of engineers at Reynaers’ purpose-built, world-class design and testing facility.
As with all Reynaers products, this system has been put through the most stringent test regime, ensuring that it is one of the highest-performing and most reliable window and door system available.
• Premium quality materials
• Highest levels of performance
• Industry-leading weather resistance

