Great Southern Wood Preserving

Great Southern Wood Preserving, Inc. (GSWP) has been a leader in pressure-treated lumber since 1970, producing the well-known YellaWood® brand that is instantly recognizable by its yellow tag. With 14 manufacturing facilities across 27 states and the District of Columbia, the company supplies DIY retailers, professional builders, and industrial customers with a full spectrum of treated lumber—including fences, columns, decks, and kiln-dried after-treatment (KDAT) products—alongside specialty items for salt-water and commercial applications. GSWP also distributes high-quality composite decking, railing, and fastener brands such as TimberTech®, Fiberon®, and FastenMaster®, and manufactures industrial packaging solutions. The company’s reputation for quality, dependability, and extensive distribution network makes it the preferred choice for outdoor building projects nationwide.