Fal-G is the product name given to a cementitious mixture composed of fly ash that are obtained from the thermal power plants which is a by-product of coal used in power generation process. This project leads to the technology of making Fal-G brick with dry fly ash from thermal power plant and foundry waste sand. The main aim of this study is to analyse the strength and durability characteristic of the Fal-G brick. This can help in controlling the environmental pollution to greater extent in the surroundings areas of thermal power plant and foundry industries. The main intension of this study is to utilize the industrial wastes in making building products. Also, if this bricks are able to replace the burnt clay bricks and it will be helpful in reducing the carbon foot print generated during the clay brick manufacturing process. Similar to fly ash, foundry waste sand is being accumulated as industrial waste in large quantity in the foundry industries and creating serious environmental problems. This study implies that the compressive strength of Fal-g brick is found to increase with age.