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The Influence of Ceiling Design on Indoor Thermal Performance

Abstract

Ceiling design is an important component of building design that can significantly influence indoor thermal performance, particularly in tropical climates where buildings are exposed to high temperatures and solar radiation. The ceiling forms part of the building envelope and can affect the movement, storage, and transfer of heat between the roof and occupied interior spaces. Its height, configuration, material, colour, insulation, and ventilation characteristics can therefore influence indoor temperature and thermal comfort. Understanding these relationships is important for developing building designs that respond effectively to climatic conditions while reducing dependence on mechanical cooling systems. This study examines the influence of ceiling design on indoor thermal performance, with emphasis on how different ceiling configurations affect heat transfer and indoor environmental conditions. The research considers ceiling height, ceiling materials, surface finishes, insulation levels, and the relationship between the ceiling and roof structure. It also examines how variations in these characteristics may influence indoor air temperature, radiant heat, heat accumulation, and occupants' perception of thermal comfort. The study provides a basis for evaluating ceiling design as an important passive thermal control strategy. The research investigates the thermal behaviour of different ceiling systems under varying climatic conditions. Higher ceilings may increase the volume of air available within occupied spaces and facilitate the upward movement of warm air, while suspended or insulated ceilings may reduce direct heat transfer from roof surfaces. Ventilated ceiling cavities can also contribute to the removal of accumulated heat before it reaches interior spaces. The effectiveness of these strategies, however, depends on material properties, roof construction, ventilation openings, and the overall configuration of the building envelope. The study further considers the interaction between ceiling design and other architectural factors, including roof form, building orientation, natural ventilation, shading, wall materials, window design, and insulation. Ceiling colour and reflectance may influence the absorption and redistribution of heat, while the thermal mass of ceiling materials can affect the rate at which heat is stored and released. These factors demonstrate that ceiling performance should be considered as part of an integrated building envelope strategy rather than as an isolated design element. The findings are expected to provide useful information for architects, building designers, and construction professionals seeking practical approaches to improving indoor thermal conditions. Appropriate ceiling design can contribute to lower indoor temperatures, improved thermal comfort, and reduced cooling requirements, especially in naturally ventilated buildings. The study may also identify ceiling configurations and material characteristics that are more suitable for tropical environments, thereby supporting climate-responsive architectural decisions. Ultimately, the study aims to establish a clearer understanding of the relationship between ceiling design and indoor thermal performance. By examining ceiling geometry, materials, insulation, ventilation, and surface characteristics, the research contributes to the development of passive design strategies for achieving more comfortable and energy-efficient buildings. The findings can support the integration of appropriate ceiling solutions into contemporary building design while encouraging greater consideration of climatic performance alongside functional and aesthetic requirements.

Keywords: Ceiling design, Indoor thermal performance, Thermal comfort, Tropical buildings, Heat transfer, Ceiling height, Roof systems, Ceiling materials, Thermal insulation, Ventilated ceilings, Indoor temperature, Passive cooling, Building envelope, Energy efficiency.