Our CUPA 14 has become the go-to natural slate roofing in the US thanks to its unbeatable quality and elegant appearance

CUPA 14: The quintessential slate look in the US

In recent decades, the tradition of using natural slate roofing in the United States has experienced a notable increase. Within this context, CUPA 14 has emerged as a highly regarded product, capturing the essence of slate roofing with its classic blue-black color.

slate cupa 14 detail

Widely celebrated as the quintessential slate look by many across the country, CUPA 14 stands as a testament to the enduring appeal and quality of natural slate. Sourced from Las Fuentes in Spain, a prestigious quarry operating since 1985, our CUPA 14 has been part of the US market since 2008.

CUPA 14 is presently the closest natural slate on the market to historically produced slates like Buckingham and Peachbottom. Moreover, what truly sets CUPA 14 apart is also the assurance of quality and trust that comes with being produced by the world’s leading slate producer.

Production that stands the test of time

With almost 20 years of covering US houses, CUPA 14 is available at a standard thickness of 7.5 mm (1/4 – 3/8”) and can be produced in even thicker options.

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Slate pieces per year

Every year we produce almost one million pieces of our CUPA 14 natural slate for the US market.
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Installed roofs

More than 2,500 CUPA 14 slate roofs have been installed in the US, representing a trusted choice throughout the country.

Statues of Liberty

Over the years, we have exported CUPA 14 in quantities equivalent to the weight of more than 110 times the Statue of Liberty

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Unbeatable lifespan

Superior by nature

Natural slate has a lifespan of at least 100 years, which guarantees a 50% longer lifespan than any other facade or roofing materials.




52.5 YEARS


47.5 YEARS


48.75 YEARS

Material lifespan according to the information provided by the manufacturers*

Sustainable footprint

Because that’s how nature made it

While other materials have to be adapted for increased sustainability, slate has always been more sustainable than the alternatives because it’s 100% natural.

Water consumption

Natural slate (x1) 10%
Fibre cement (x11) 21%
Zinc (x135) 100%
Clay (x2) 12%

Energy consumption

Natural slate (x1) 10%
Fibre cement 60%
Zinc (x4) 40%
Clay (x2) 20%

Air pollution

Natural slate (x1) 10%
Fibre cement 60%
Zinc (x4) 40%
Clay (x2) 20%

* Comparison carried out based on the information published by the French database INIES on September 2014: http://www.base-inies.fr/Inies/Consultation.aspx.

Certified quality

Our meticulous approach throughout the entire process enables us to offer a range of natural slate that surpasses all international quality standards, while also being certified by the strictest independent bodies.

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Our CUPA 14 has been certified as S1 under ASTM C406, meaning that it has meets the highest standards for weather resistance.

100-year guarantee

CUPA 14 is backed by a hundred-year guarantee issued directly from us, the producers, resulting in a reassuring peace of mind.

Información de trazabilidad del producto

Replacement for Buckingham slate

Our CUPA 14 has been approved as a replacement for Buckingham slate by the Virginia Department of Historic Resources and the National Park service.


CUPA PIZARRAS has a comprehensive quality control system that is unique, allowing us to identify the origin, typology, technical data, and production dates of each of our natural slates. Our traceability process is carried out using a unique barcode that accompanies the slate throughout its production process.

Thanks to this system, it is possible to monitor the quality of all our CUPA 14 pallets in real-time and provide our distributors and customers with accurate information about each piece of slate. From the Las Fuentes quarry to any location in the United States or elsewhere.

slate quality traceability

Technical specifications

Natural slate possesses extraordinary inherent characteristics. Our CUPA 14 holds the highest international certifications for quality and resistance to the elements, ensuring outstanding performance.

You can consult and download all of them from our resource center.

Water absorption
0,24% Code : W1 (< 0,4%)

Contents of carbonate non carbonated
0,30% Fulfill (< 1,5%)

Mor characteristic
Transverse 43 MPA
Longitudinal 38 MPA

SO2 exposure test

Thermal cycle test

Freeze thaw test
Fulfill < 0,6%

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Contact information

Other resources are available to you to contact us:

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US Office

email: usa@cupapizarras.com
telephone: +1 (912) 964-9609