Question { JMC Projects, 22382 }

Heat gain in buildings is best resisted by

Answer

Heat gain of a building depends upon its Facade. That is why maximum buildings have structural Glasses & ACP sheets all around. Insulated glass (DGU) transmit the sun light upto 40-75 percent depends on the selection of glass type, DGU glasses have also a reflect index inside it which also reduce the heat gain. For safety purpose we use Toughened glass.
Other material is ACP which has PVDF coating inside. PVDF also reduce heat gain to some extent, for better result we may also use 25mm thk. glass wool behind ACP sheets which minimize the transfer of sun heat to inside of building.
This technique is broadly used in Gulf countries because of increase in normal temp. as compared to India.