“…Generally classified as cultural heritage property (UNESCO, 1972), heritage buildings include "monuments" of outstanding universal values (The Burra Charter, 1999;Feilden, 2003;The Commissioner of Law Revision, Malaysia, 2005), built within historic environments (Jitilon, 2018). Philosophically, the success of maintenance management of heritage buildings is not only evaluated on the quality of the repair but also on the extent of conformity to building conservation principles (Kayan, 2015(Kayan, , 2019. There is growing international commitment to achieve sustainable repair (Kayan et al, 2017(Kayan et al, , 2018(Kayan et al, , 2019; however, this commitment mainly focuses on new building structures and upgrading works, while very little attention is given to heritage buildings.…”