Dear Kamal
By doing thermal insulation you can reduce the heat from top level.Thermal insulation is a method to reduce the transfer of heat from outside to inside. To make house heat proof, thermal insulation is a good choice. An insulated home is more comfortable as t he temperature remains consistent over weather changes. It makes the house comfortable and keeps the temperature of house cool in summers and warm in winters. It is very useful to keep the temperature of the house independent from outside temperature see link givenbelow. http://www.gharexpert.com/articles/Finishing-1607/Thermal-Insulation-Home_0.aspx