James Jones Timber Systems is now distributing JJI-Joists through French engineered timber company France Poutres. France Poutres is a family run business, which manufactures all-timber I-joists and is now also supplying JJI-Joists as a cost effective alternative for floors, walls and roofs, James Jones says. Mark Tilston, business development manager for Timber Systems says: "Over 2012 and 2013 we have …