The UEAtc (Union Européenne pour l'Agrément technique dans la construction) is a grouping of at present 18 approval bodies which, officially recognized, grant voluntary national approvals or national approvals regulated by law for construction products and systems. It concerns in each case an institute from Belgium, the Czech Republic, Denmark, Germany, Finland, France, Great Britain, Hungary, Ireland, Italy, the Netherlands, Norway, Poland, Portugal, Romania, Sweden, Slovakia, Spain and Ukraine. 

This cooperation began in 1960 with at that time six institutes involved, i.e. just 30 years before the adoption of the Construction Products Directive at the end of 1988. It is based on mutual confidence in the technical competence and reliability of all partners; a legal or contractual basis does not exist. The aim is to avoid unnecessary inspection efforts within the context of approval procedures by recognizing tests already carried out in another national approval procedure.