Unlike other types of tiles, which can in some cases be produced through a variety of methods, interlocking tiles can only be manufactured on a large scale with a tile press. Many distinct profiles fall into this category, such as the Marseilles and Conosera profiles. This allows them to provide a high ratio of roof area to number of tiles used. Their distinguishing feature is the presence of a ridge for interlocking with one another. Interlocking tiles Interlocking tiles of the Mangalore pattern, Tamil Nadu, Indiaĭating to the 1840s, interlocking tiles are the newest category of roofing tile and one of the widest ranging in appearance. In addition to the "S" shaped Spanish tiles, this category includes the Scandia tiles common to Scandinavia and Northern Europe. These tiles are traditionally formed through an extruder. This allows for greater surface area coverage with less tiles, and fewer cracks that could lead to leakage. Pantiles are similar to mission tiles except that they consolidate the pan and cover into a single piece. Pantiles / S tiles Pantiles in a "Spanish" pattern This could add a taper to one end of the tile. Unlike the imbrex and tegula both the pan and cover of Mission tile are arched.Įarly examples of this profile were created by bending a piece of clay over a worker's thigh, which resulted in the semi-circular curve. Similar to the imbrex and tegula design of tile, mission tiles are a semi-cylindrical two-piece tile system, composed of a pan and cover. Mission / Monk and Nun tiles Mission tile in Spain In early designs tegula were perfectly flat, however over time they were designed to have ridges along their edges to channel water away from the gaps between tiles. The tegula is a flat tile laid against the surface of the roof, while the imbrex is a semi-cylindrical tile laid over the joints between tegulae. The imbrex and tegula are overlapping tiles that were used by many ancient cultures, including the Greeks, Romans, and Chinese. Imbrex and tegula Edges of each tegula (a) are covered by curved imbrex (b) These tiles commonly feature a squared base, as is the case with English clay tiles, but in some cases can have a pointed or rounded end, as seen with the beaver-tail tile common in Southern Germany. As a result of this, flat tiles require more tiles to cover a certain area than other patterns of similar size. When installed, most of an individual shingle's surface area will be covered by the shingles overlapping it. All forms of slate tile fall into this category. One of the simplest designs of roof tile, these are simple overlapping slabs installed in the same manner as traditional shingles, usually held in place by nails or screws at their top. Shingle / flat tiles Flat tiles on the Church of St Andrew in Greensted, Ongar, Essex, England There are numerous profiles, or patterns, of roof tile, which can be separated into categories based on their installation and design. Tiles typically cover an underlayment system, which seals the roof against water intrusion. Roof tiles can be affixed by screws or nails, but in some cases historic designs such as Mangalore tiles utilize interlocking systems that are self-supporting. Later tiles have been made from materials such as concrete, and plastic. Roof tiles are overlapping tiles designed mainly to keep out rain or snow, and are traditionally made from locally available materials such as clay or slate. See also: Roof shingle Clay tile roofs in Dinkelsbühl, Germany
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