Who makes dry wall?

Drywall is primarily manufactured by companies that specialize in building materials, with some of the largest producers including USG Corporation, National Gypsum, and CertainTeed. These companies create drywall panels by sandwiching a layer of gypsum plaster between two sheets of heavy paper or fiberglass. The production process involves mixing gypsum with additives, forming it into sheets, and then drying it to create a sturdy, lightweight material used in construction.