scope:

This part of EN 927 addresses performance criteria for coatingsystems on exterior wood. Performance requirements are specifiedaccording to three categories of end use (defined in EN 927 1) interms of two mandatory tests namely natural weathering performancetesting carried out in accordance with EN 927-3, and waterpermeability in accordance with EN 927-5. Additional optional tests(non-mandatory) are tabled which may be used by suppliers, or forspecification purposes, to provide additional information, to astandardized format, on aspects of performance relevant to specificsituations. The majority of test methods are drawn from EN 927 (allparts), but where relevant additional tests from other national andinternational sources are used. Requirements for claimingconformity with FprEN 927-2 are defined and provide flexibility fordifferent situations and can also provide a basis forcertification.