CUPA 3 Heavy 3 / San Pedro de Trones

Tectonic roofing slate

A blue-grey, dark grey slate with a documented natural-stone character. The recorded appearance includes natural cleft, fine laminated texture. Recorded applications include roofing, rainscreen cladding, wall cladding and paving.

Stone familySlate

Primary colourBlue-Grey

Medium / needs supplier validation verification · Reference STN-0000927

Use our experts

Get this stone with our architectural support.

Professional reference

Specification snapshot

Indicative catalogue data. Verify the exact stone, finish, thickness and current test certificates before specification.

Mohs hardness3-4

Water absorption0.1-0.6 %

Compressive strength80-200 MPa

Flexural strength30-70 MPa

Density2700-2900 kg/m³

PorosityNot reported

Material profile

Character & application

Common finishes: Natural cleft, sawn, split, honed
Typical uses: Roofing, rainscreen cladding, wall cladding, paving, landscaping
Exterior suitability: Excellent for roofing and cladding if certified
Frost resistance: Generally excellent for roofing-grade slate
Recorded colour palette: Blue-Grey, Dark Grey
Slab variation: V2 Slight variationSlight variation: subtle changes in tone or texture may occur.