The SlimLine 38 addresses one of the most technically demanding challenges in architectural window specification: replacing original Crittall-style steel windows on period and listed buildings while achieving the thermal, weather and security performance that modern standards demand.
The exceptionally slender aluminium profiles of the SlimLine 38 closely match the visual sightlines of the original steel sections — satisfying planning officers and conservation advisors who require that the character of the original glazing is preserved, while delivering the draught-free, secure and thermally efficient performance that contemporary occupants require. This combination makes the SlimLine 38 the natural and most frequently specified choice for heritage renovation projects, listed building works, and any project where maintaining the visual character of an original steel-framed elevation is a planning or design requirement.
Available in a range of RAL and metallic finishes specifically suited to heritage and contemporary contexts alike, including finishes that closely replicate traditional steel window coatings in anthracite, black, silver grey and bronze tones.
Double glazed units are standard; acoustic and solar control glass can be specified where additional performance is required. Multi-point locking is standard. The SlimLine 38 can be combined with the CS 77 system for projects specifying both standard and slim-sightline windows across the same building. Visit our Window Showcases to see the SlimLine 38 installed in completed heritage renovation and contemporary projects across southern England and London.
