Andersen Corporation

Andersen Corporation is America's largest window and door manufacturer, founded in 1903 by Danish immigrant Hans Andersen in Hudson, Wisconsin, and still privately held by the Andersen family with headquarters in Bayport, Minnesota. With estimated 2025 revenue exceeding $3.5 billion and approximately 12,000 employees, Andersen operates manufacturing facilities across the United States, Canada, and Italy. The company is renowned for its multi-material window systems spanning wood, aluminum-clad, and its proprietary Fibrex® composite material, maintaining an unwavering commitment to American manufacturing excellence and product innovation.

Core Business

Andersen's core business centers on Exterior Windows and Doors systems. The company's window portfolio includes the Andersen® 400 Series (vinyl-clad wood windows), Andersen® E-Series (architectural aluminum-clad wood), Andersen® 100 Series featuring proprietary Fibrex® composite material, and Renewal by Andersen® (replacement window division). Andersen's most formidable moat lies in exterior windows with nearly flawless category coverage including thermal break systems, Low-E energy-efficient glass, sliding bay windows, and hurricane impact-resistant products. The company also produces comprehensive entry door systems including steel security doors and storm doors with multi-point anti-theft locking systems. Andersen's exclusive Fibrex® material — a wood-fiber composite with twice the strength of vinyl — provides superior thermal performance and durability, representing a significant competitive differentiation in the market.

Global Presence

Andersen maintains manufacturing facilities across the United States, Canada, and Italy, supporting its position as North America's largest window and door manufacturer. The company's extensive North American distribution network includes company-owned and independent distribution centers, showrooms, and dealer partnerships ensuring broad market coverage. Andersen's international presence, while secondary to its dominant North American market position, includes manufacturing capabilities in Italy for European market product lines and distribution partnerships throughout Canada.

Key Strengths

Andersen's competitive advantages stem from its highly vertically integrated, pure self-manufacturing model with absolutely no OEM/ODM production. The company maintains a complete heavy-asset supply chain spanning timber harvesting and processing, deep glass processing, proprietary Fibrex® extrusion molding, and final assembly. As a 120+ year-old family business, Andersen brings unparalleled brand heritage and customer trust to the residential replacement window market. The company's multi-material product strategy — offering wood, aluminum-clad wood, and Fibrex® composite options across multiple price points — provides coverage of virtually every market segment. Andersen Corporation's scale with $3.5+ billion in revenue and 12,000 employees enables significant investment in R&D for new product development, manufacturing automation, and customer experience innovations including its Renewal by Andersen® replacement window brand.