Boardex 1200x2400 12.5mm - Dalsan It is a specially designed fiberglass based cement plate for external facade and moisturs produced by external facade and humid environments. This plaque with 12.5 mm thick and 1200x2400 mm size, is resisting high humidity, temperature change and fire. In external wall coverings, ventilated facade systems, balconies and other construction elements are safely used. Dalsan Boardex presents steady performance in both light structures and heavy weather conditions. Easy cut, mounting is fast and has high insulation capacity.