Building material in Europe?

Hi! wondering if there are any companies in (middle) Europe which are specialized in selling building material for recording studios? I´ve searched for a long time now, but only find companies wihich are building drywalls for offices and so on. This is not the same. There should be 1000 companies or more in USA or Australia (for example: http://www.soundisolationstore.com/Resi ... s_s/49.htm ) Where do Europeans buy their stuff, if they want to build a "serial" studio? Thank you for your advice lg Bertie