Diamond Building Products Public Company Limited, formerly known as Diamond Roofing Tiles Public Company Limited, is a Thailand-based company engaged in the production and distribution of roofing tiles, boards and ceilings, siding boards, roof accessories, non-roof products and services for roof stripping and installation. It operates one factory in Saraburi province. The Company distributes its products under the trade names of Diamond, Roof, Adamas and Jearanai. The Company's tile products are divided into three groups: fiber cement tiles, concrete tiles and Jearanai tiles. Fiber cement tiles include Roman tiles, small corrugated tiles, flat sheets, Jatulon and fiber cement ridges, among others. Concrete tiles comprise Gran Onda, Adamas, concrete ridges. Jearanai tiles include Jearanai tiles, Jearanai ridges and others.