With decorative effects being incorporated more frequently into roof designs, we are the only company to offer ornamental plain tiles with a guaranteed performance in all weathers down to 40 pitch. Following extensive testing at our wind tunnel facility, the guarantee is offered across all our plain tile ranges. The Rosemary name is synonymous with clay plain tiles, adding distinction and character to pitched roofs for over 175 years. Today, a range of single and cross-camber tiles combine the quality of hand-crafted clay with the reliability of modern machine-made techniques. Produced from the finest clays, Rosemary is offered in a range of weathered, brindled and single colours that create striking and attractive roofs. The latest addition to the range is the Heather Brindle, an orange sanded tile, with distinct purple brindling to create strikingly attractive roofs. Certification BBA certified. Rosemary Clay Classic Plain Tiles conform to BS EN 1304: 2013 Clay roofing tiles and fittings - Product definitions and specifications.