The International Federation of Building and Wood Workers (IFBWW) was a global union federation of trade unions in the building, building materials, wood, forestry and allied industries. It was established in 1934 by a merger of the Building Workers International and Wood Workers International. The International Secretariat of Stone Masons, the International Secretariat of Painters and Allied Trades and the International Secretariat of Bricklayers later joined the organisation.