CUPA 7
CUPA 7 is a non-carbonated natural slate formed by tectonic compression.
Black slate with thin laminations and a smooth surface.

Origin
Quarry Arcas Prada. San Pedro de Trones (Leon) Spain.
Operating since
1968
Formats
Rectangular
Sizes
16”x8” and 16”x10”
Thicknesses
3/16” to 3/8”
ASTM Tests
Value | ASTM Test Method | ASTM Grade | |
---|---|---|---|
Modulus of Rupture | 742 lbs, Ave. thickness 0.304 in | C120-19 | S1 |
Absorption | 0.181% | C121-20 | S1 |
Weather Resistance | 0.0006 in | C217-20 | S1 |
All Vermont Slate Company® roofing products meet or exceed ASTM C-406 S1 Standards
Technical Specifications
Absorption
< 0,4% Code : W1 (< 0,4%)
Carbonate Non-Carbonated
≤ 0,2% Fulfill (< 2%)
Mor Characteristic
Longitudinal ≥ 55 MPA
SO2 Exposure Test
S1
Thermal Cycle Test
T1
Freeze Thaw Test
Fulfil < 0,6%
International Certifications
CUPA 7 roofing slate meets the following international standards:

C-121-20 (S1), C-120-19 (S1), C-217-20 (S1)

BS 680 Part 2

EN 12326

NF 02/05 - Nº 5277

ATG/H876