Recital 20

(20) Where harmonised standards lay down the rules for the assessment of performance with regard to essential characteristics relevant for the construction codes of Member States, those standards should be made mandatory for the purposes of application of this Regulation as performance harmonised standards, as only such mandatory standards reach the goal of permitting the free circulation of products, whilst ensuring the Member States’ ability to request product characteristics related to the basic requirements for construction works in view of their specific national situation such as differences in climate, geology and geography and other conditions. When pursued together, these two goals require that products are assessed by a single assessment method, therefore the method needs to be mandatory. However, voluntary standards can be used to make product requirements, specified for the relevant product family or product category by delegated acts, even more concrete, following the path of Decision No 768/2008/EC of the European Parliament and of the Council (10). In line with Decision No 768/2008/EC, those voluntary standards should be able to provide a presumption of conformity with the requirements covered by them.

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Source: EUR-Lex (Cellar) · retrieved 2026-10-17 · Text as adopted (Official Journal); later amendments are not incorporated in this text.