Ethnomodelling can be considered as an association between ethno-mathematics and mathematical modelling which allows us to experience different realities in a particular culture. A lot of tacit knowledge contained in the Indonesian culture is only understood as part of tradition, especially in the form of vernacular architecture. In fact, this knowledge can become material for development in the field of praxis, which plays a role in enriching the repertoire of contemporary architecture. Thus, ethno-modelling is seen as a way of facilitating the understanding of cultural components through the modelling process involving three cultural approaches: local, global, and glocal. Thus, ethno-modelling research provide insights into various locally developed tacit knowledge so that they can be understood explicitly.This study explores the mathematical knowledge developed through the dynamics in vernacular architecture in Indonesia. It examines the case of Minangkabau traditional architecture, Kajang Padati Gadang House, and analyzes their vernacular house forms. Through the ethno-modelling approach, the object is descriptively studied from its physical and non-physical aspects.The findings show that there are various kinds of translation processes that can understand how Minangkabau people who live in Padang City can respond to various forms of adaptations through their architecture.