The document discusses various materials used for waterproofing, including bitumen, asphalt, polyurethane sheets, and marine board. Bitumen is produced from petroleum distillation residue and has plastic and viscous qualities, aging over time. Asphalt is a synthetic mix of sand and bitumen that has increased durability over bitumen alone. Polyurethane sheets were founded by Dr. Otto Bayer and are insulating, weather resistant, durable, non-degradable, and flexible. Marine board is a consciously carved material for use in marine environments where plywood cannot stand, and is insulating, durable, and flexible. The document lists areas that require waterproofing such as roofs, walls