Thermocol or EPS sheets are in fact an excellent thermal insulator for the Indian climate. They are lightweight and affordable (making them easy to install), with a high insulation value.
I would also like to set the record straight, insulation with EPS is a smart choice to make even if you don’t use air conditioning (AC).You see, insulation maintains a comfortable interior environment. When you insulate, it DOES NOT LET THE HEAT IN during summers, because the source of heat is the exterior environment.
Back in the olden days, homes used to be built with thick mud walls. These walls, due to their thermal mass (http://www.yourhome.gov.au/passive-design/thermal-mass ) would act as very good insulators. These homes used to be very comfortable, and the comfort factor was increased by hanging wet chiks/ jute mats/ curtains on all windows and doors. Of course, if you let the warm air indoors by leaving your windows and doors completely open, insulation will not work very efficiently for you, regardless of whether it is a mud house or a modern home with EPS insulation.
Another added benefit of insulation with EPS is, if you choose the right products, a phenomenon called thermal bridging will not occur. Thermal bridging refers to heat seeping in or out through small uninsulated regions, such as the gap between two insulation panels, or the uninsulated areas near fixtures. This not only decreases the efficiency of insulation, but also reduces the strength of the building. The reason is that buildings are composite structures made of materials that expand or contract due when exposed to heat or the cold respectively. The variation in daily temperatures, as well as the difference between day and night, is sufficient to cause this thermal expansion/contraction. What happens when something that is not very flexible expands or contracts too many times? It cracks.
So EPS insulation increases the life of the structure as well as making the interiors comfortable, and you need it for your home regardless of whether you use AC or not.For more details on thermal insulation, check out our website Building insulation Home | Reliable Building Solutions India