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In developed countries, the majority of dwellings have a ceiling installed under the structural members of the roof. For all those that do not, extra insulation is often installed under the outer level. Because the reason for a rooftop is to protect people and their belongings from climatic elements, the insulating properties of any roof top are a thought in its framework and the decision of roofing material.Some roof materials, those of natural fibrous materials especially, such as thatch, have excellent insulating properties. Somebody who specializes in roofing construction is named a roofer.The durability of a roof top is a subject of concern because the roof structure is often the least accessible part of the building for purposes of repair and renewal, while its devastation or damage can have serious effects. Drainpipes take away the dependence on a sloping roof covering also. In areas where there is little rainwater, an almost flat roof with a slight run-off provides sufficient protection against an intermittent downpour. Other styles of roofing, for example pantiles, are unstable on the steeply pitched roof but provide excellent weather protection at a comparatively low angle. Some types of roof, for example thatch, require a steep pitch in order to be durable and waterproof. So the pitch is partly dependent upon stylistic factors, also to do with practicalities partially. Although modern engineering elements such as drainpipes might remove the dependence on pitch, roofs are pitched for reasons of custom and appearance. Most US local architecture, except in very dried out locations, has roofs that are sloped, or pitched. The pitch is the perspective at which the roof rises from its lowest to highest point. The construction of a roof depends upon its approach to support and how the underneath space is bridged and set up rooftop is pitched. Other roofer materials include asphalt, coal tar pitch, EPDM plastic, Hypalon, polyurethane foam, PVC, slate, Teflon textile, TPO, and hardwood shingles and shakes. In lots of elements of the global world ceramic tiles have been the predominant roof covering material for years and years, if not millennia. Shack made of date palm branches at Neot Semadar, IsraelA roof top may provide additional liveable space, for example a roof structure garden.The elements in the design of a roofing are:the materialthe constructionthe durabilityThe material of a roof may range from banana leaves, wheaten straw or seagrass to laminated wine glass, copper (see: copper roof covering), aluminium sheeting and pre-cast cement. The roof of any garden conservatory protects plants from cold, wind, and rain, but admits light. A verandah may be roofed with material that protects against sunlight but admits the other elements.
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In most countries a roof protects against rain primarily. The word also denotes the framing or structure which supports that covering.The characteristics of your roof are dependent upon the purpose of the building so it covers, the available roofer materials and the neighborhood traditions of development and wider concepts of architectural design and practice and may also be governed by local or nationwide legislation. It is the covering on the uppermost part of any building or shelter which gives protection from pets or animals and weather, notably rain or snow, but also heat, wind and sunlight. A roof top is part of the building envelope.