Who are the biggest garage door manufacturers?

The biggest garage door manufacturers in North America are Clopay as largest residential manufacturer, Overhead Door Corporation which owns Overhead Door and Wayne Dalton, and Amarr, while in Canada biggest are Garaga and Richards-Wilcox, and globally biggest is Hörmann from Germany. Clopay, headquartered in Mason, Ohio, owned by Griffon Corporation, is largest residential garage door manufacturer in North America, producing over 1 million doors annually, with market share 30 to 40 percent, sold through Home Depot and dealers, known for Intellicore insulation. Overhead Door Corporation, founded in 1921, headquartered in Lewisville, Texas, owned by Sanwa Holdings, owns Overhead Door brand and Wayne Dalton, is second largest, with commercial and residential doors, global presence. Amarr, headquartered in Winston-Salem, North Carolina, owned by Entrematic and ASSA ABLOY, is third largest in US, with significant market share, sold through dealers and Costco. In Canada, Garaga, based in Quebec, is largest Canadian manufacturer, and Richards-Wilcox based in Ontario is second largest Canadian. Globally, Hörmann Group from Germany is largest garage door manufacturer worldwide, with presence in Europe and North America. So biggest garage door manufacturers are Clopay largest in US residential, Overhead Door Corporation large with commercial, Amarr large, Garaga largest Canadian, and Hörmann largest globally.