These square edged 10mm white uPVC plastic capping fascia boards, also known as reveal liners, are used for covering over existing wooden fascia. The existing timbers fascia boards need to be in good condition, or some remedial work may be needed prior to installing the capping fascia board. Specification: Thickness: 10mm Material: PVC Manufacturers Guarantee: Lifetime (see documents for details). Fire Rated: Yes (see documents)