Non-carbonated slate formed by tectonic compression. Blue black slate with thin laminations and a smooth surface.
Split to an average thickness of 3.75 mm, 5 mm and 7.5 mm.
Note: As this is a natural product it is possible that there will be a shade variation.
CUPA R4 Excellence has the approved status from the Snowdonia National Park.
Benuza (León) Spain.
Operations start date
Operating since 1968
Sizes: Between 25x15cm and 50x38cm
Thickness: 3.75 mm, 5 mm and 7.5 mm
R EXCELLENCE, H, NATURAL
Rectangular is the most common model in the UK.
If you are interested in other formats or sizes please contact us.
CUPA 4 roofing slates meet the following international standards
Technical documentation (declaration of performance, certifications, …) available in the resource center.
0,19% Code : W1 (< 0,4%)
Contents of carbonate non carbonated
0,50% Fulfill (< 2%)
Longitudinal 53 MPA
SO2 exposure test
Thermal cycle test
Freeze thaw test
Fulfill < 0,6%
Would you like to see a sample? Please complete the form to receive your slate sample.
Here you can see some examples of projects that uses our CUPA 4 slate. Go to our projects section to see more works.