"White roofs for cool homes" ! Coating the Rooftops white has many benefits like . 1. Keeps the roof cool. 2. White roofs has high solar reflectance and thermal emittance . That means a white roof reflects most of the heat and light back to atmosphere. 3. The coating extends the life and reduces the wear and tear of the roof . 4. White roofs increases the efficiency of solar water heater (more heat and light on the collectors) 5. White roofs increases what is called the 'albedo effect'. That means the solar PV modules gets marginally more light increasing the yield of solar PV modules . 6. If Bi-facial solar modules are used , white roofs increases the yield of the solar modules . 7. The rainwater run-off from the rooftop increases on a white roofs. That means more Rainwater run off and less leakage . 8 . The air conditioner load inside the building reduces significantly. 9. Roof looks clean and pleasant . 10 . Certain white coatings also act as a waterproof coating . 11. Reduced electricity usage inside the building.
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