Very low cost and effective way for thermal insulation is to apply limestone powder on the roof, easily lowers room temperature by 2 degrees Celsius, even 2 deg

Very low cost and effective way for thermal insulation is to apply limestone powder on the roof, easily lowers room temperature by 2 degrees Celsius, even 2 degrees makes a big difference in hot summers. Did it at my native place home last summer, made heat a bit bearable with temperatures going beyond 45 degrees. https://youtu.be/t4OET7b4ZgI https://youtu.be/t4OET7b4ZgI