CUPA 4 natural slate is made from non-carbonated, blue-black slate with a smooth surface, split to thicknesses of 3.75, 5 and 7.5mm, and is designed for roofing and facade applications. Produced since 1892, it is available in a range of sizes and shapes, with approved status from Snowdonia National Park and compliance with international standards.

  • Natural slate for roofing and facades, available in multiple thicknesses and sizes

  • Blue-black colour with thin laminations and smooth finish

  • Non-carbonated slate formed by tectonic compression

  • Meets EN 12326 and BS EN 12326:2014 standards

  • Low water absorption and high durability

  • Range of shapes including rectangular, bullnose, rhomboid and ogival

Applications

  • Roofing for residential and commercial buildings

  • Facade cladding

  • Heritage and conservation projects

  • Public and cultural buildings

  • Architectural renovations

Dimensions

Sizes between 25 x 15 and 50 x 38cm

Thickness: 3.75, 5, 7.5mm

Performance

Water absorption: 0.18% (W1, <0.4%)

Carbonate content: 0.50% (<1.5%)

Longitudinal MOR: 57 MPa

SO2 exposure: S1

Thermal cycle: T1

Freeze-thaw: <0.6%

Materials

Natural non-carbonated slate

Colours

Blue-black

Finish

Smooth surface with thin laminations

Options and variations

Rectangular, bullnose, rhomboid, ogival shapes

Selections: R, H, NATURAL

Origin

Armadilla Quarry, Benuza (León), Spain

Accreditations

EN 12326

BS EN 12326:2014

ATG/H517

Approved by Snowdonia National Park