Set up in the 1950s, SAHA (Salvation Army Housing Association) was established to manage the administration of housing newly retired officers. The charity's current concern is to help all people in the community in need of housing. 'Transforming Lives' is their logo. Grade II Listed; The Old School in Ashford, Kent provides accommodation to many people in need through the SAHA charity. The building required upgrading as the thin cavity double glazed windows let in draughts and were unable to retain the heat effectively. Due to the buildings Listed status, the primary windows could not be replaced. Selectaglaze secondary glazing is a reversible adaptation and approved by most Heritage bodies for use on Listed buildings. The project presented Selectaglaze with the challenge of fitting secondary units to windows with gothic style curves and trefoil shapes. The use of 3D digital measuring device allowed the openings to be modelled with precision which enabled the best possible fit for the bespoke designed units. The application of secondary glazing brought the accommodation up to twenty first century standards.