Harmonised technical specification

Explained

A harmonised technical specification determines, for a family of construction products, which essential characteristics the manufacturer declares and by which methods they are assessed. Under Regulation (EU) No 305/2011 these are harmonised standards (hEN) and European Assessment Documents (EAD); under Regulation (EU) 2024/3110 they are the harmonised standards made mandatory by implementing act, together with the other acts listed in Article 3(42). For a product covered by such a specification the declaration is mandatory and the product carries the CE marking. The switch to the declaration of performance and conformity happens per product family, one year after adoption of the implementing act or later (Art. 95(9)). There is no single cut-off date; check the Official Journal or ask your notified body which specification applies.