Abstract
The building sectors are considered a significant contributor for energy consumption globally in the present scenario. The roof is a primary building envelope, and maximum heat gain entered through it in a daytime operation for a composite climate of India. In the present study, a techno-economic analysis of cool roof slabs using different paint materials (Exterior Weather Shield Ultra Clean, Exterior TR E2000, Exterior Weather shield E1000, and Exterior Weather shield Flex) was carried out. The Internal Rate of Return (IRR) and payback period are evaluated for the cost-effectiveness of cool roofs. The Internal Rate of Return (IRR) of cool roofs varied from 32.55% to 36.55%, with payback period of 2 years. The building roofs with cool paints significantly save 2.16–3.09 USD/m2, so cool roof technology is energy-efficient and cost-effective in a composite climate.
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