Armstrong World Indus (NYSE:AWI) reported quarterly earnings of $1.81 per share which beat the analyst consensus estimate of $1.75 by 3.43 percent. This is a 13.12 percent increase over earnings of $1.60 per share from the same period last year. The company reported quarterly sales of $386.60 million which missed the analyst consensus estimate of $386.69 million by 0.02 percent. This is a 11.32 percent increase over sales of $347.30 million the same period last year.