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natural american slate roofing

Roofing

CUPA 3

CUPA 3 is a blue black slate with a slightly gritty texture, and in some samples well defined parallel lines are clearly visible on the cleavage surfaces.

Its extra thickness of 7-8 mm gives it the perfect strength to withstand any weather conditions while boosting the value of any property.

Characteristics

Color

Black slate

b

Surface

Riven

0

Sizes

12×8”, 14×8”, 16×8”, 16×10” and 20×10”

a

Thicknesses

7-8 mm

Warranty

Eligible for 75-year

Technical Specifications

Water Absorption

0,22% Code : W1 (< 0,4%)

Carbonate non-carbonated

0,50% Fulfill (< 1,5%)

Mor characteristic

Longitudinal 45,4 MPA

SO2 exposure test

S1

Thermal cycle test

T1

Freeze thaw test

Fullfil < 0,6%

All American Slate roofing slates are pre-dilled with two nail holes.

International Certifications

astm standard

ASTM

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

british standard

British Standard

BS 680 Part 2

ce marked

CE marking

EN 12326

french standard

French Standard

NF 02/09 – Nº 17704

belgian standard

Belgiam Standard

ATG H 571

ASTM Test

Value ASTM Test Method ASTM Grade
Flexure 915 lbs, Ave. thickness 0.292 in. C-120-15 S1
Water Absorption 0.118% C-121-15 S1
Weather Resistance 0.0006 in. C-217-15 S1

Eligible for American Slate’s limited 75-year warranty.

Projects Gallery

Want a slate sample?

We welcome your inquiries and would be delighted to have the opportunity to discuss why American Slate is the right choice for your next project — and for our times.