A contractor cutting costs on insulation, plasterboard, or piping can quietly bring materials into your home that were never assessed for fire resistance or structural performance. One document tells you whether that risk applies to your project.
What the Declaration of Performance actually is
A Declaration of Performance (DoP) is a document, issued by the manufacturer, that states a construction product's performance against its essential characteristics — including fire resistance, structural load capacity, thermal performance, and release of dangerous substances. It's required under the EU's Construction Products Regulation whenever a product is covered by a harmonised European standard or has received a European Technical Assessment. Under Article 8 of the regulation, a manufacturer legally cannot affix the CE mark without first drawing up a DoP for that product.
Why the CE mark alone isn't quite the full picture
The CE mark tells you a product's performance has been declared and assessed according to a harmonised standard — but member states are still allowed to set their own national requirements on top, and can restrict the use of CE-marked products that don't meet those additional national standards. A CE mark is a strong baseline signal, but it doesn't override your own country's specific building requirements.
A recent, significant upgrade: DoP becomes DoPC
Regulation (EU) 2024/3110, in force since January 2025, replaces the Declaration of Performance with an expanded Declaration of Performance and Conformity (DoPC), which adds environmental and climate performance information alongside the original technical characteristics, plus a Digital Product Passport requirement being phased in. This reflects a genuine push toward more comprehensive, standardised information — not just safety and structural data but sustainability data too.
How to actually check a product before it's installed
- Ask your contractor directly which specific insulation, plasterboard, piping, or structural products they intend to use.
- Request the Declaration of Performance (or DoPC, for products covered by the newer regulation) for each — manufacturers are required to make this available.
- Check the declared fire resistance class and structural values against what your project actually needs, particularly for shared walls, escape routes, or load-bearing elements.
- Use a public DoP database (several exist, aggregating declarations by product) to independently verify a document a contractor provides, rather than accepting it at face value.
- Be especially cautious with materials imported from outside the EU/EEA — these are the products most likely to lack a genuine, valid DoP.
What this means practically
- A construction product covered by a harmonised standard legally cannot carry a CE mark without a Declaration of Performance behind it.
- The CE mark is a floor, not a ceiling — your own country can still impose stricter requirements on top of it.
- Since January 2025, some products carry the newer Declaration of Performance and Conformity (DoPC), which adds environmental data to the original safety and structural information.
- Ask for and independently check documentation for structurally or fire-safety-critical materials specifically — this is where a missing or fake CE mark does the most real damage.
Sources
- European Commission — Declaration of Performance and CE marking under the Construction Products Regulation: single-market-economy.ec.europa.eu
- Designing Buildings — Declaration of Performance and Conformity (DoPC) under Regulation (EU) 2024/3110: designingbuildings.co.uk
Related Kibbo Tools
- Material Certification Databases Directory — check CE marking and Declaration of Performance records directly.