Cary, North Carolina-headquartered Cornerstone Building Brands Inc., a manufacturer of exterior building products, acquired Eastern Architectural Systems. Headquartered in Fort Myers, EAS specializes in impact-resistant windows and doors, primarily serving the Florida repair and remodel market. This acquisition expands Cornerstone Buildings Brands’ impact-resistant product offering, increases its presence in the Florida region and strengthens its ability to serve customers and channels with a comprehensive portfolio of materials, products and brands, company officials said. Cornerstone Building Brands, which has more than 20,000 employees, serves residential and commercial customers across the new construction, repair and remodel markets. Its portfolio of products spans vinyl windows, vinyl and metal siding, stone veneer, metal roofing, metal wall systems and metal accessories.