EXHIBIT 11 PLY GEM INDUSTRIES, INC. AND SUBSIDIARIES SCHEDULE OF COMPUTATION OF NET INCOME PER SHARE QUARTER ENDED JUNE 30, (IN THOUSANDS) 1997 1996 ---------------- ---------------- FULLY FULLY PRIMARY DILUTED PRIMARY DILUTED ------- ------- ------- ------- Weighted average number of common shares outstanding during year............. 13,827 13,827 14,179 14,179 Excess of weighted average number of shares issuable upon exercise of employee stock options over 20% of shares outstanding at end of quarter.......................... 2,759 2,759 1,923 1,923 ------- ------- ------- ------- Weighted average number of shares....... 16,586 16,586 16,102 16,102 ======= ======= ======= ======= Proceeds available to repay debt: From exercise of options, including tax benefits, at average market price.............................. $37,772 $29,562 From exercise of options, including tax benefits, at quarter-end - market price....................... $33,447 $30,508 ------- ------- ------- ------- $37,772 $33,447 $29,562 $30,508 ------- ------- ------- ------- Interest saved, net of taxes............ 409 362 302 312 Net income as reported.................. 3,033 3,033 4,157 4,157 ------- ------- ------- ------- Adjusted net income..................... $ 3,442 $ 3,395 $ 4,459 $ 4,469 ======= ======= ======= ======= Per share............................... $.20 $.20 $.28 $.28 1