EXPLORING ROOF STACKING IN EXISTING BUILDINGS TO ACCOMPLISH SUSTAINABLE ARCHITECTURE: A CASE STUDY APPROACH

The global community is currently facing an array of challenges, posing substantial threats to human survival, including environmental degradation, resource depletion, and population growth. The positive impacts outlined in the Agenda 2023 are strategically designed to address these highlighted concerns, recognized as the root causes of numerous challenges. Among these challenges, urban sprawl stands out as a critical issue requiring sustainable solutions. Upgradation in the context of constructing on top of existing structures is more desired sustainable approach to make cities sustainable and resilient. Roof stacking emerges as a preferred sustainable strategy to meet the evolving needs of urban populations. This research is based on exploratory method to find the parameters that makes roof stacking an efficient and sustainable approach. The study reviews previous literature on the roof stacking of historic buildings, establishing a set of standards through content analysis, for evaluating three particular buildings (Irving Street Brewery in Australia, Hearst Tower in United States of Amercia and Fahle House in Estonia) as case studies. The research assessed seven key aspects of sustainable architecture, examined in the article including heritage, technology, materials, services, form, fenestration, and access. The findings demonstrate that all three cases while quite distinct from each other with the blend of old with the new structures in the integration of seven performance parameters in order to achieve sustainable architecture. Keywords: Sustainability, roof stacking, sustainable architecture, existing buildings, old structures