Lousaval is a dark blue/grey natural roofing slate which is produced from the ‘La Fraguina’ mine by the German owned ‘Groupo Cafersa’. The slate is sold under their name Lousaval LV11. The 5mm slate is flat and smooth and in first grade is more or less pyrite free which achieves a very neat and even roof-line.
Fully compliant under B.S. EN12326-1:2004 as A1,T1,S1 and carries a quarry guarantee of 50 years.
Lousaval is a available in both first grade (5/6mm) and standard grade (5/7mm)