CUPA 25 roof slates are made from non-carbonated slate formed by tectonic compression.

  • Colour: blue-black with thin laminations
  • Surface: smooth
  • Sizes: between 25x15 and 50x38cm
  • Format: normally rectangular; other options available
  • Average thickness: 3.75, 5, 6, 7 and 9mm
  • Water absorption: 0.30% code: W1 (< 0.4%)
  • Carbonate non-carbonated: 0.50% fulfill (<1.5%)
  • Mor characteristic: longitudinal 61.2 MPA; transverse 46 MPA
  • SO2 exposure test: S1
  • Thermal cycle test: T1
  • Freeze thaw test: fulfill <0.4%
  • Origin: Quarry Las Arcas Prada, San Pedro de Trones (León), Spain

As this is a natural product it is possible that there will be a shade variation.