There has been a gradual decrease in the lining life of the roofs of the Twin Hearth furnaces at Bhilai Steel Plant due to a combination of operating practice and quality of refractory materials. This paper focuses on the interventions carried out to improve the roof life which have increased the campaign life from an average of 368 heats in 2010-11 to an average of 436 heats with a record life of 545 heats in 2011-12.