La Baña – Northwest Spain
Roofing & Cladding slates
True un-fading DEEP BLACK
Structured vertical lines.
Exported since 1995.
From 30cm x 20cm up to 60cm x 30cm
7-8mm (1/4”); 55 kgs/m2; 1000 Lbs/square
FRANVISA® is produced from one source of origin and has a long history of exporting high quality slates to the most demanding markets.
FRANVISA® is exclusive to be natural®.
The quality control of be natural® staff in the quarry guarantees a perfect selection of your order before the collection.
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: 27.9 N/mm2 / Longitudinal: 70.6 N/mm2
Mechanical Resistance, Mean Failure Load
Transverse: 34.7 N/mm2 / Longitudinal: 85.8 N/mm2
0.3 % Complies
Complies with code W1 0.32%
Sulphur Dioxide Exposure
Non-Carbonate Carbon Content
0.7 % Complies
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