The Duquesa 20 is a Spanish slate quarried in the highly regarded La
Baña region of Northern Spain.
Its distinctive Hebra riven texture and blue/black colour make it a
popular choice for Roofing contractors, self-builders and Architects.
Test results
The Duquesa 20 slate has met or surpassed the strictest
testing requirements, it has achieved the highest classification in
all quality standards.
It carries the CE marking and has been tested in accordance with EN
12326 and is classified as W1 - S1 - T1.
Guarantee
The Duquesa 20 Natural Roofing slate is covered by a 75 year
guarantee (Guarantees to be requested within 6 months of the date of
completion of the roof).
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