Bernardos – Spain
Roofing & Cladding slates
True un-fading SILVER GRAY
First Spanish quarry, producing since 1559.
More than a slate, it is a phyllite.
Best ASTM laboratory test results in the world.
Perfect match for Buckingham slate.
Exclusive supplier of historical & royal buildings in Spain.
Metrics & Imperials.
From 30cm x 20cm (12” x 08”) up to 50cm x 30cm (20” x 12”)
6-7mm (1/4”) 46 kgs/m2 875 Lbs/square
9-10mm(3/8”) 66 kgs/m2 1275 Lbs/square
DEL CASTILLO® is produced from one source of origin.
Unique stone for unique costumers. Exporting world wide.
The quality control of be natural® staff in the quarry guarantees a perfect selection of your order before the colletion.
We control color, thickness, size and labels.
be natural® transport your order from the quarry up to your doorstep, wherever you are in the world.
Dimension and Dimensional Variation
Nominal Thickness and Variation
Mechanical Resistance, Characteristic MoR
Transverse: 22.81 N/mm2 / Longitudinal: 42.93 N/mm2
Mechanical Resistance, Mean Failure Load
Transverse: 32.05 N/mm2 / Longitudinal: 52.19 N/mm2
Complies with code W1 0.09%
Sulphur Dioxide Exposure
Non-Carbonate Carbon Content
Release of Dangerous Substances
None in conditions of use as roofing or external cladding
External Fire Performance
Deemed to satisfy
Reaction to Fire
Deemed to satisfy CLASS A1
Galicia – Spain
DEL CASTILLO® slate is certified by the European and American laboratories.