The leading international institutions have certified the quality of all our natural slates, ensuring ideal performance under any climate conditions.
The French NF mark ensures the quality, safety and performance of natural slate products.
Our natural slate exceeds the standards required by European Union regulations.
Voluntary technical approval of construction products conducted by the Belgian UBAtc institution.
The UKCA (UK Conformity Assessed) label is the new mandatory seal for products in the United Kingdom.
All our natural slates are subject to laboratory tests to certify their excellent quality.
Exposure to SO2
CE, NF, ATG
Carbonate content, CaCO3
Non-carbonated carbon content
Flexural strength - Longitudinal
> 64 Mpa
Flexural strength - Transverse
> 55 Mpa
You can download the official certificates for all our products simply and automatically from here.