Patent ID: 7229698

Claim:
Laminated board ( 11 ) for exterior cladding comprising a core ( 13 ) of kraft paper impregnated with phenolic resin, at least one layer of natural wood ( 14 ) and at least one surface covering layer ( 15 ) which includes a coating film ( 17 ) and a substrate film ( 16 ), characterized in that: a) the coating film ( 17 ) is a film with at least one layer of polymethylmethacrylate (PMMA) either pure or modified through the addition of other polymers, b) the substrate film ( 16 ) is a paper impregnated with a compound formed from a phenolic resin in a proportion of between 95 and 80% by weight and a polymer promoting adhesion of the said coating film ( 17 ) in a proportion of between 5 and 20% by weight, wherein the adhesion-promoting polymer is an acrylic polymer.