Technical standards

The DIN and EN standards that matter when planning and specifying natural stone projects.

Standard	Title	What it means in practice
DIN EN 12058	Natural stone products — Slabs for floors and stairs — Requirements	Defines requirements for dimensional tolerance, flatness and flexural strength of floor slabs.
DIN EN 12057	Natural stone products — Modular tiles — Requirements	Dimensional requirements for calibrated tiles in standard formats.
DIN EN 1341	Slabs of natural stone for external paving — Requirements and test methods	Requirements for frost resistance, flexural strength and slip resistance outdoors.
DIN 51130 / DIN EN 16165	Determination of slip resistance of pedestrian surfaces — Methods of evaluation (R ratings)	R9 (low) to R13 (very high). At least R11 for commercial kitchens, R12 for large-scale catering kitchens. DIN 51130 has been superseded by EN 16165:2021, published in Germany as DIN EN 16165:2023; the R classification remains in place.
DIN EN 12371	Natural stone test methods — Determination of frost resistance	Test method for freeze-thaw resistance. Relevant wherever freeze-thaw exposure has to be assessed or declared; whether testing is required follows from the product standard and the specification.
DIN EN 13755	Natural stone test methods — Determination of water absorption at atmospheric pressure	Low water absorption is an indicator of lower susceptibility to staining and often of better freeze-thaw behaviour — but it does not replace the frost resistance test to EN 12371.
DIN EN 1926	Natural stone test methods — Determination of uniaxial compressive strength	Relevant for load-bearing elements, facade anchoring and heavily loaded floors.
DIN EN 1936	Natural stone test methods — Determination of real density and apparent density, and of total and open porosity	Determines material density and open porosity — important for structural calculations and transport planning.