In 1908, Charles Geisen founded the “Alsatian Emulsion Factory”, the forerunner of SOPREMA. During this period, architects were designing large terraces for private villas. Natural asphalt or coal tar was being used as a roofing material. These products were very expensive and not very reliable.
Charles Geisen’s stroke of genius came when he began dipping jute cloth into hot bitumen. The result was a lightweight, solid, strong sheeting which came to be known as MAMMOUTH®.