Johns Manville, founded in 1858 and headquartered in the United States, operates within the manufacturing industry, specifically focusing on building materials. The company employs between 5,001 and 10,000 individuals and generates significant revenue, reported at approximately $4 billion. Johns Manville specializes in producing a range of products for the construction sector, including insulation, roofing materials, and other building components. One of their published documents, the "Cover Board Comparison Guide," provides detailed comparisons of various cover boards used in roofing applications, highlighting attributes such as thickness, mechanical fastening options, and compatibility with solar applications. The guide includes specifications for products like ProtectoR HD, ENRGY 3 HD, and DensDeck, along with performance ratings and installation advantages. This document reflects the company's commitment to providing comprehensive product information to assist customers in making informed decisions regarding roofing materials. Overall, Johns Manville's focus on building materials and detailed product documentation underscores its expertise in the construction industry.