CUPA HEAVY 3 - Blue-black natural slate with non-rusting metallic particles and thin laminations. Split to an average thickness of 7.5 mm.
For roof pitches.
Natural blue-black slate with a slightly gritty texture, and in some samples, well-defined parallel lines are clearly visible on the cleavage surface.
A feature of this slate is the presence of metallic cubes of iron sulphide, known as pyrite, approximately 2 mm in size. Sometimes these cubes are randomly distributed throughout the slate, while in other cases they are concentrated in discrete bedding layers. Heavy 3 is the suitable choice for repair and replacement of traditional roofing in Scotland.
Features and benefits:
300 x 200 mm
350 x 200 mm
400 x 200 mm
400 x 220 mm
400 x 250 mm
500 x 250 mm
Warranty available of up to 100 years on natural slate products.
H62/105 Roof slating
H62/110 Roof slating with counterbattens
H62/3 Roof slating
H62/5 Roof slating with counterbattens
Not available with 500 mm.
For 400 mm and 500 mm only.
To BS EN 12326.
Nominal thickness and individual thickness variation
Thermal cycle test
Sulfur dioxide exposure test
Non-carbonate carbon content (maximum)
CUPA Heavy 3 - Blue Black Natural Slate
Standards methods of test
To BS EN 12326.
Characteristic modulus of rupture (transverse)
Characteristic modulus of rupture (longitudinal)
Country of material origin
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