The increase in local air temperature, particularly in urban areas of Indonesia, has led to recorded temperatures as high as 34 °C. This rise in temperature has highlighted the importance of building materials in influencing the microclimate and the comfort of building occupants. As a result, there is a need for strategies to mitigate the Urban Heat Island (UHI) effect. Research is being conducted to identify and evaluate the effectiveness of environmentally friendly building materials in absorbing and reflecting heat to address UHI. The focus is on the roof of buildings, as they receive high exposure to solar heat. The use of solar reflective materials, such as cool roof solar reflective paint, can help to minimize the impact of UHI. These findings aim to optimize the microclimate and improve thermal comfort for both building occupants and the surrounding environment. The research method employs field experiments in urban environments to quantify the surface temperature of building roofs through the utilisation of cool roof solar reflective paint. Surface temperature measurements are obtained through the deployment of a data logger temperature sensor, which records data in a continuous manner. The findings of the study indicate that building roofing materials, comprising both metal and non-metal components, exhibit disparate solar reflective rates. The intrinsic characteristics of these materials ultimately determine the temperature of the surface temperature received by the building roof. The application of solar reflective paint has been demonstrated to reduce the surface temperature of non-metal roofs by 7–10 °C and metal roofs by 11–15 °C.