In country like India insulation plays a vital role in residential and commercial buildings. India has diverse climatic condition like hot & dry, hot & humid, very cold and moderate. Thermal insulation requirement also varies with the climate zone and type of building use.   ECONOMIC BENEFIT Insulation reduces the home heating & cooling cost by 20 to 30%. Reduce the burden of increasing energy prices. Cost of insulation pays for itself in 3 to 5 years thru reduced electricity or fuel bill. Cost of insulation is not more than 1 to 3% of the total property value and last life long without any maintenance. Well insulated building reduces the size or capacity of HVAC system and thus minimizes capital expenditure.