A modern thermal aluminium solution for heritage and refurbishment projects. Designed as a direct replacement for traditional steel windows and doors with slim sightlines and enhanced thermal performance.
Alitherm Heritage provides the ideal solution for heritage applications such as listed building renovations and large scale replica-refurbishment projects where planning constraints are to be considered. This modern thermal aluminium system is designed to replicate the aesthetic of traditional steel windows and doors while delivering contemporary thermal performance and security standards.
The system utilises Smart's innovative polyamide thermal break technology which creates a barrier between the cold air outside and the warm air inside. This technology significantly reduces thermal transmittance and enhances the overall U Value of a product, designed to meet the exacting requirements of Document L 2010.
Available in a choice of standard or non-standard colours, including metallic, dual colour, textured finishes, and anodised effect options. The slim 59mm sightlines maintain the authentic heritage appearance while incorporating modern multi-point locking systems and 316 Marine Grade Stainless Steel hardware options for durability and security.
Tested and certified
Enhanced insulation
59mm typical
Steel window replacement
Multiple colour options
316 Stainless Steel















Get in touch with our team to discuss your Crittall style door project and receive a personalized quote
Interested in Crittall Style Doors? We'd love to hear from you