Rapid urbanization in Dhaka has significantly diminished green spaces, worsening environmental issues such as urban heat, poor air quality, and stormwater management challenges. Green roofs offer an effective solution by integrating vegetation into building rooftops; however, their use in Dhaka remains limited, with only a small share of residential buildings adopting this approach. Most existing installations lack proper technical planning and context- specific guidance, leading to inefficiencies and sustainability issues. This study creates locally relevant guidelines for green roof installation in Dhaka’s residential buildings, addressing the gap between global standards and local conditions. Employing a mixed-methods approach—including literature review, field surveys, case studies, and expert input—the research identifies common roof types (extensive, intensive, extensive with designed plantations, and movable pot plants). It examines their components, including waterproofing, drainage, substrate, and plant selection. Results show that many current installations are inconsistent, rely heavily on materials, and lack professional oversight. The proposed guidelines focus on lightweight construction, proper waterproofing, parapet treatment, adequate drainage and overflow systems, and the use of native plants to boost resilience and reduce costs. This study supports sustainable urban growth by providing practical, context-specific strategies for architects, engineers, and policymakers to implement eco-friendly rooftop practices in Dhaka.
Ahmed et al. (Thu,) studied this question.