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The Brihanmumbai Municipal Corporation (BMC) has launched a pilot to apply cool roof coating on selected municipal buildings in the G/South ward to reduce indoor heat as the city faces rising temperatures. The reflective Solar Reflective Paint contains additives like titanium dioxide that bounce sunlight off roofs, lowering heat absorption. The project targets buildings including schools and staff quarters, with initial results guiding potential citywide expansion. Similar technologies have been used in industrial structures and other Indian cities to effectively reduce rooftop temperatures.
Mumbai's civic body, the Brihanmumbai Municipal Corporation (BMC), has started a pilot project to apply cool roof coating on selected municipal buildings to address increasing indoor heat in the city. The initiative uses Solar Reflective Paint, a white coating containing titanium dioxide and other reflective materials, which helps reflect sunlight and reduce heat absorbed by rooftops. Officials expect it to lower indoor temperatures by around five percent compared with conventional painted roofs. Advertisement
The pilot has been planned in the G/South ward, which covers areas like Prabhadevi and Lower Parel. This ward was selected because the BMC office there has prior experience with sustainable building practices, including net zero initiatives, making it suitable for testing eco-friendly heat mitigation solutions. The pilot includes municipal buildings such as schools, staff quarters, and offices where heat reduction can directly improve comfort for residents and employees.
BMC officials explained that while the cost of reflective paint is higher than ordinary coatings, it offers long-term benefits in terms of energy savings and building comfort. Similar solutions have been used in Ahmedabad and on industrial structures across India, helping reduce roof surface temperatures and indoor heat. The reflective paint diverts sunlight instead of allowing it to penetrate the roof, providing measurable cooling effects.
Tender preparations are underway, and the work is scheduled to begin by May. The pilot is intentionally limited in scope to evaluate the impact before expanding the program citywide. If the results are positive, other wards and civic buildings may adopt the coating. Officials believe this approach is part of a larger effort to make municipal infrastructure more resilient to rising urban temperatures.
Experts point out that combining cool roofs with other measures, such as improved ventilation and green roofs, can further help reduce heat in urban areas. The BMC pilot aligns with recommendations from municipal climate reports and international climate advisory groups, aiming for practical and scalable heat mitigation solutions in the city.
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