Reynaers Aluminium UK has launched a new ‘high insulation plus’ variant to its SlimLine 38 windows system, combining Passive House levels of insulation with minimal sightlines and a reduced carbon footprint.
Designed to support demand for sustainability-led construction, Reynaers SlimLine 38 HI+ (SL 38 HI+) window system (inward opening) can be fabricated to replicate the ‘steel look’ typically found in heritage buildings. It is also ideal for retrofit projects as well as domestic or commercial projects where there is a desire for a clean, modern finish.
Suitable for reduced energy building projects, SL 38 HI+ is produced with Cradle to Cradle certified profiles that are 100% recyclable to support product circularity while providing a design-led option to specifiers and architects also looking for a premium performance product.
SL 38 HI+ reaches Passive House levels of insulation, drastically limiting heat loss to achieve an exceptional level of thermal efficiency to meet and exceed the latest building standards, making it suitable for newbuild projects as well as upgrades and refurbishment projects.



