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centres focused on sustainable development and 18 training centres , ensuring it is at the forefront of industry innovation .
It employs 5,200 people , has 34 manufacturing plants , 60 operating subsidiaries , including Italian single-ply manufacturer FLAG SpA , and some 4,500 distributors .
The Group was founded in 1908 by Charles Geisen , inventor of the Mammoth Membrane which paved the way for modern waterproofing membranes , and remains a family affair , with his grandson Pierre Etienne
Soprema Research and Innovation Centre Strasbourg
The “ Cut & Cover ” portals at the Hindhead Tunnel
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