This slate comes from Northern Spain, in the heart of the historic slate producing areas.
The Contessa is a blue/black slate which can exhibit some visual pyrite, this pyrite is inert and will not effect the performance of the slate as a water tight roof covering. The slate offers a smooth face with neatly dressed edges.
The ISS-39 slate boasts a W-1, T-1, S-1 rating, meaning it conforms and surpasses all the top UK tests for water absorption, thermal cycle resistance and sulphur dioxide exposure.
The Contessa is a blue/black slate which can exhibit some visual pyrite, this pyrite is inert and will not effect the performance of the slate as a water tight roof covering. The slate offers a smooth face with neatly dressed edges.
The ISS-39 slate boasts a W-1, T-1, S-1 rating, meaning it conforms and surpasses all the top UK tests for water absorption, thermal cycle resistance and sulphur dioxide exposure.
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