‘Roofs should be repaired promptly by an experienced roofer. Binoculars are a useful aid when doing external checks, and further examination may be possible from rooflights or dormer windows,’ says Roger Hunt, author of Old House Handbook. ‘Roofs should be checked regularly, especially after storms. Avoid asphalt tiles as these only have a lifespan of around 15 years. For example, slate can last up to 200 years if cared for correctly, while clay and concrete are expected to last between 30 and 60 years. However, the lifespan of roof tiles varies depending on the material of the tiles. On average a roof will need replacing every 60 years. (Image credit: Getty Images) How often does a roof need replacing? As a general rule, machine-made tiles can be installed on roofs of 35°, but handmade tiles require a minimum of 40°. Roof pitch is also an essential consideration, the minimum pitch differs between styles and designs of tile so always check the details of the tile you wish to purchase. Providing a modern, sleek look they are proving popular with new-builds and extensions. Interlocking tiles are one of the most cost effective roof coverings. Roman tiles on the other hand, ‘have a flat shape with one or two raised rolls, and are often seen in Mediterranean countries, especially in Italy,’ adds Douglas. Pantiles are side-lapping and the ends overlap only tiles in the course immediately below, unlike plain tiles which lap two courses,’ says Douglas Kent, technical and research director at the Society for the Protection of Ancient Buildings. ‘The beauty of a pantile-covered roof is that it weighs just two-thirds of a plain-tiled one, and can be laid to a lower pitch. Other options include the larger S-shaped pantiles, Roman tiles and Interlocking tiles.
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