With its flexibility, choice of colours and tile patterns Bardoline offers the freedom to design innovative roofs that are in harmony with the environment and the function of the building. Two-Tone Range The attractive appearance of a traditional weathered tiled roof can now be achieved with Bardoline using the new two-tone range. The two-tone colour effect is created by varying the colour of the ceramicised granules across the strip. On the roof this achieves the subtle variation of colours normally only associated with conventional clay tiles.