BUILDING MATERIALS, HARDWARE, GARDEN SUPPLY, AND MOBILE HOME DEALERS (SIC MAJOR GROUP 52) This major group includes retail establishments primarily engaged in selling lumber and other building materials; paint, glass, and wallpaper; hardware; nursery stock; lawn and garden supplies; and manufactured (mobile) homes. It includes lumber and other building materials dealers and paint, glass, and wallpaper stores selling to the general public, even if sales to contractors account for a larger proportion of total sales; these establishments are known as retail in the trade. Establishments primarily selling these products but not selling to the general public are classified in wholesale trade.