Federations, manufacturers or service providers from the construction industry can become full members.
Any federation or member can become a promoting member who would like to support the basic idea of the IBU.
An application for membership can be made to the IBU informally on letterheaded paper. The application for membership must then be agreed any the Board of Management. With a simple majority decision you then receive a letter from the administrative offices informing you of wether the membership is confirmed or why the application was refused.
With this confirmation letter, the applicant is then accepted as a member of the IBU. The amount contributed depends on turnover and the rules on contribution can be obtained.