Thermal Qualities
External doors from Longden combine the bespoke beauty and quality that you expect from our hardwood designs. Plus, we also provide a choice of doors with enhanced thermal properties. With each individually designed door coming with a 10-year guarantee against bowing, with CE marking and all necessary certificates.
The Longden Thermal range with enhanced heat-reducing qualities provide you with a range of options from 68mm thick, through 78mm and 88mm up to the top level 98mm that incorporates all the properties required in line with Passivhaus recommendations. You can read more about Passivhaus below.