![calidad-tejado-hm](http://pizarraslaluz.com/wp-content/uploads/2022/12/calidad-tejado-h.jpg)
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Certified Quality
![](http://pizarraslaluz.com/wp-content/uploads/2022/12/NFP.png)
NF Certification
![](http://pizarraslaluz.com/wp-content/uploads/2022/12/MarcadoCE.png)
CE Marking
Our natural slate exceeds the standards required by European Union regulations.
![](http://pizarraslaluz.com/wp-content/uploads/2022/12/ATGP.png)
ATG Certificate
Voluntary technical approval of construction products conducted by the Belgian UBAtc institution.
![](http://pizarraslaluz.com/wp-content/uploads/2022/12/ukca-logo.png)
UKCA Marking
The UKCA (UK Conformity Assessed) label is the new mandatory seal for products in the United Kingdom.
Laboratory Tests
Water absorption
A1 (0,3%)
Thermal cycle
T1
Exposure to SO2
S1
Approvals
CE, NF, ATG
Carbonate content, CaCO3
A1 (0,3%)
Non-carbonated carbon content
0,45%
Flexural strength - Longitudinal
> 64 Mpa
Flexural strength - Transverse
> 55 Mpa