0000912562 2020-01-17 2020-01-17 false 0000912562 8-K 2020-01-17 GIBRALTAR INDUSTRIES, INC. DE 0-22462 16-1445150 3556 Lake Shore Road P.O. Box 2028 Buffalo NY 14219-0228 716 826-6500 false false false false Common Stock, $0.01 par value per share ROCK NASDAQ false