Premium Spanish Black Natural Slate (CUPA 12‑Grade)
Roofing & Cladding | Daya Stone
 
Product Overview
Sourced from the world‑renowned slate quarries of Galicia, Spain and precision‑finished in Daya Stone’s state‑of‑the‑art Shuitou facility, this CUPA 12‑grade slate brings a deep charcoal–black tone, fine‑grained texture and exceptional structural integrity to contemporary and heritage projects alike. Our strict block selection and CNC calibration guarantee uniform 4–6 mm thickness, crisp arrises and a matte surface that weathers gracefully for decades.
 
Key Benefits for European Specifiers
Architect‑preferred colour: consistent dark grey‑to‑black hue complements zinc, timber and lime render façades found across Northern and Western Europe.
Tested to EN 12326: water absorption ≤ 0.17 %, W1 / T1 / S1 classification ensures frost resistance and no thermal shock delamination in climates from Oslo to Milan.
Longevity > 100 years: metamorphic density (~2,800 kg m‑³) and naturally low porosity deliver a roof or rainscreen that outlasts multiple renovation cycles.
Lightweight yet strong: 30–40 % lighter than many other roofing stones, reducing sub‑structure loads and installation times.
Low‑carbon build: purely mechanical extraction and processing; no chemical resins or artificial colouring—qualifies for BREEAM and LEED material credits.
 
Typical Applications
Pitched roofing (nominal 25–90°) on residential, hospitality and civic buildings
Vertical or diagonal rainscreen cladding
Interior feature walls, fireplace surrounds and countertop accents
Landscape elements: garden paths, water features, pool copings
 
Standard Formats
Size (mm)
Pieces / m²*
Weight (kg / m²)
Fixing Holes
500 × 250
20
29–32
Ø 4.5 mm countersunk
400 × 250
25
30–33
Ø 4.5 mm countersunk
600 × 300
16
31–34
Ø 5 mm countersunk
*Based on 100 mm head‑lap. Other sizes, nail holes, hook fixing and pre‑holed patterns available on request.
 
Technical Data (Typical)
Modulus of rupture (MOR): 55 MPa (normal) / 40 MPa (after freeze‑thaw)
Thermal conductivity: 1.74 W m‑¹ K‑¹
Non‑combustible: Euroclass A1
 
Processing & Quality Assurance
Every slab is sawn on automated bridge saws, calibrated for even thickness, hand‑dressed for a traditional riven edge, then packed in ISPM‑15 heat‑treated pine crates. Each pallet carries a unique QR code linking to quarry traceability, EN 12326 test reports and batch photography.
 
Logistics & Service
FOB Xiamen weekly sailings to Rotterdam, Hamburg, Felixstowe and Antwerp
Mixed‑container consolidation with granite, marble or quartzite possible
On‑site technical team can provide roof layout drawings, wind‑load calculations and installer training videos in English, German or French.
 
Elevate your next project with the timeless elegance of authentic Spanish black slate—contact the Daya Stone export team for samples, pricing and lead times today.