Established in 1947, Lemay Concrete Block is a provider of block and concrete products. Based in St. Louis, Mo., the company offers retaining wall blocks, building blocks, patio pavers and precast products, to name a few. It also specializes in providing stamped, aggregate and colored concretes. The company provides retaining wall products in various categories, such as classic, classic colonial, cottage blocks, rustic, vintage blocks and wall caps. It also offers building blocks in various sizes, such as 2, 4, 6, 8 and 12 inches.