Specification and compliance
Natural-Stone Technical Data, DoP, CE Marking and Performance
Read technical data sheets, declarations of performance and CE information correctly, then connect each declared property to the real construction and project country.
Documents do not replace design
A technical data sheet summarises information chosen by a supplier. A Declaration of Performance follows a regulatory framework for a defined product and intended use. CE marking indicates that required information has been declared; it is not a universal quality label.
The designer must still decide whether the declared properties suit the actual format, exposure, fixing, support and local regulations.
Identify the exact product
Check commercial and geological identification, quarry, product type, thickness range, finish, intended use, manufacturer and document date. A test on one material or direction may not represent every later batch.
For anisotropic stone, specimen orientation can materially affect the result. Confirm whether tests correspond to the real cutting and loading direction.
Common performance properties
Relevant data may include apparent density, water absorption, flexural strength, breaking load, abrasion, slip resistance, frost resistance, thermal behaviour and reaction to fire. Not every property is required for every use.
Select evidence by risk. A façade panel, stair tread, worktop and interior wall lining ask different questions.
| Property | Typical relevance | Common mistake |
|---|---|---|
| Water absorption | Staining, moisture and frost context | Treating one number as complete durability |
| Flexural strength | Panels, treads and slabs | Ignoring orientation and safety factors |
| Abrasion resistance | Floors and public traffic | Confusing hardness with easy maintenance |
| Slip resistance | Wet or inclined floors | Comparing different test methods directly |
| Freeze–thaw resistance | Exposed exterior stone | Ignoring saturation and construction details |
Standards and project country
Standards, harmonised requirements and national rules change over time. Verify the current edition and whether the product, test method and construction fall within its scope.
An international client may be building in France or elsewhere. The applicable law and technical framework follow the project location, not the client’s nationality.
Build an auditable specification
Record the accepted stone, finish, format, relevant declared values, required tests, sampling basis and responsibilities for validation. Avoid copying every value from a brochure into the specification.
Combine documents with representative samples, shop drawings, installation method, prototype and inspection. Performance belongs to the complete system, not the stone name alone.
Need advice for a real project?
Marble Import supports international homeowners, architects and interior designers with stone selection, samples, technical feasibility and coordination of high-end stonework in France and across Europe.