As with all our products, terracotta and concrete tiles have timeless aesthetic appeal and durability. These tiles are also fire-resistant, which makes them a great choice for areas prone to bushfires and provides good insulation, allowing homes to remain cool in summer and warm in winter. Council Halls, teaching and research buildings: Due to the good air exchange and the lack of light, moss and lichen will occur if they are not kept clean, especially in areas of high humidity, so they are very durable but require periodic treatment. Cheap terracotta can be replaced by concrete tiles, which, at a lower cost, provide the same advantages.