Calidad 20 Roofing Slate

Calidad 20 Spanish roofing slate is suitable for a wide variety of buildings.

Calidad 20 Spanish slate has a smooth, slightly textured appearance, with no visible pyrite. This slate, which is blue grey in colour, is very easy to grade and lay on the roof and is sourced directly from the slate quarry.

The manufacturer of this roofing slate is one of the world’s largest slate producers which ensures increased availability and with more than 1 million slates being sold in the UK it has a proven track record. This slate has a quarry backed guarantee.

This roofing slate complies with the relevant British and European standards, BS EN 12326 and the test results show that this slate is A1, T1 and S1.

Specification

Produced in Northern Spain to German Standards
Comes in sizes 50×38 & 50×25
Comes in Prime quality
Stringent selection criteria
High quality slate rock
No visible pyrite
Conforms to British & European standards.

Data Sheet

Water absorption	W1
Non carbonate carbon content	In accordance <1%
Mechanical resistance characteristics (MoR)	Transversal 47N/mm² Longitudinal 53N/mm²
Calcium carbonate content	Complies <1%
Dimensional tolerances	Complies
Thermal cycle	T1
Exposure SO2	S1
External fire performance	Deemed to satisfy A1
Reaction to fire	Deemed to satisfy A1
Release of dangerous substances	None
Use as roofing or external cladding	Yes

Calidad 20 Data Sheet

Calidad - Calidad 20 Roofing Slate