International Journal of Technology 11(1) 133-143 (2020) Received November 2019 / Revised December 2019 / Accepted January 2020 International Journal of Technology http://ijtech.eng.ui.ac.id Maintaining Social Sustainability through the Boundary Formation of Sacred Spaces in Moslem Dwellings Samsu Hendra Siwi 1 , Yandi Andri Yatmo 1* , Paramita Atmodiwirjo 1 1 Department of Architecture, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia Abstract. This paper addresses the issue of social sustainability in the daily spatial practices in dwellings. In particular, it discusses the establishment of sacred spaces in the everyday activities of Moslems in their dwellings, as manifested through the boundaries between clean and dirty zones related to religious rituals. The study employed a qualitative approach and the use of a case study as the method. The case study consists of six Moslem dwellings in urban areas, using in-depth interviews and observations to obtain data about the activities and behaviors of the dwellers. The boundaries between clean and dirty zones were found to be established based on the journey of footwear in the house. The formation of these boundaries could be considered a mechanism for maintaining the place’s sustainability—a way to maintain the cultural identity of Moslems in their dwellings. The sustainability of sacred places was established through social agreement on the use of spaces and the boundaries defined for temporary spaces. Keywords: Moslem dwelling; Sacred spaces; Social sustainability; Spatial agreement; Temporary 1. Introduction Sustainable development goals are defined by four inseparable sustainability aspects: environmental, economic, legal, and social sustainability (Suwartha et al., 2018). One of the goals of social sustainability is the achievement of well-being and quality of life through connection between the built environment and social experience (Vallance et al., 2011). The social sustainability goal will not succeed without the community, so it is important to understand the role of the community in maintaining sustainability and promoting well- being in the daily living environment. Social sustainability emphasizes the preservation of social values, cultural traditions, and ways of life (Vallance et al., 2011). Culture interacts with cultural identity to influence both individual and collective values (Gudykunst et al., 1996). Cultural identity is an individual's sense of self that comes from the formal or informal membership of a group "that transmits and instils knowledge, beliefs, values, attitudes, traditions, and ways of life" (Jameson, 2007). It is important to consider cultural identity in order to understand a community’s values (Gudykunst & Nishida, 2000). Cultural identity is important as a frame of reference for how individuals define themselves and how they respond to their social relationships (Gudykunst et al., 1996). Therefore, it is important to maintain cultural identity in order to maintain the social sustainability of a particular community. * Corresponding author’s email: yandiay@eng.ui.ac.id, Tel.: +62-21-7863504; fax: .+62-21-330343 doi: 10.14716/ijtech.v11i1.3764