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A rooftop is part of any building envelope. It's the covering on the uppermost part of the building or shelter which gives protection from family pets and weather, rain or snow notably, but heat also, sunlight and wind. The term denotes the framing or composition which supports that covering also.[1]The characteristics of any roof are dependent upon the goal of the building it includes, the available roof materials and the local traditions of building and wider principles of architectural design and practice and could also be governed by local or national legislation. In most countries a roof protects against rain primarily. A verandah may be roofed with material that protects against sunlight but admits the other elements. The roof of a garden conservatory protects plants from cold, wind, and rain, but admits light.Shack made of date palm branches at Neot Semadar, IsraelA rooftop could also provide additional liveable space, for example a roof covering garden.The elements in the look of a roof top are:the materialthe constructionthe durabilityThe material of the roof may range from banana leaves, wheaten seagrass or straw to laminated cup, copper (see: copper roofing), aluminium sheeting and pre-cast concrete. In many parts of the global world ceramic tiles have been the predominant roofing materials for centuries, if not millennia. Other roof covering materials include asphalt, coal tar pitch, EPDM rubber, Hypalon, reboundable foam, PVC, slate, Teflon fabric, TPO, and real wood shakes and shingles.The construction of your roof is determined by its approach to support and the way the underneath space is bridged and set up roof is pitched. The pitch is the viewpoint at which the roof rises from its most affordable to highest point. Most US local structures, except in very dry locations, has roofs that are sloped, or pitched. Although modern building elements such as drainpipes might take away the dependence on pitch, roofs are pitched for reasons of tradition and aesthetics. So the pitch is partly dependent upon stylistic factors, and partially regarding practicalities.Some types of roof, for example thatch, require a steep pitch to become durable and waterproof. Other types of roofing, for example pantiles, are unstable over a steeply pitched roof but provide excellent weather protection at a relatively low angle. In regions where there is little rain, an almost flat roof with a slight run-off provides adequate protection against an occasional downpour. Drainpipes take away the dependence on a sloping roof top also.Somebody who specializes in roof covering construction is named a roofer.The durability of any roofing is a subject of matter because the roof covering is usually the least accessible part of any building for purposes of repair and renewal, while its damage or destruction can have serious results.Because the purpose of a roof covering is to protect people and their property from climatic elements, the insulating properties of an roofing are a awareness in its framework and the decision of roofing materials.Some roofer materials, those of natural fibrous materials specifically, such as thatch, have excellent insulating properties. For those that do not, extra insulation is installed under the outer part often. In developed countries, nearly all dwellings have a ceiling installed under the structural members of the roof. The goal of a ceiling is to insulate against high temperature and cold, sound, dirt and frequently from the droppings and lice of birds who frequently choose roofs as nesting places.Cement tiles can be utilized as insulation. When installed giving a space between the tiles and the roof covering surface, it can reduce heating system caused by sunlight.Forms of insulation are sensed or cheap sheeting, sometimes with a reflective surface, installed below the tiles or other materials immediately; synthetic foam batting laid above the ceiling and recycled paper products and other such materials that can be inserted or sprayed into roof cavities. So called Cool roofs are becoming popular increasingly, and in some full cases are mandated by local codes. Cool roofs are thought as roofs with both high reflectivity and high thermal emittance.Poorly covered and ventilated roofing can have problems with problems such as the formation of snow dams around the overhanging eaves in winter, causing water from melted snow on higher elements of the roof top to penetrate the roofing materials. Ice dams arise when heating escapes through the uppermost part of the roof, and the snow at those true things melts, refreezing as it drips along the shingles, and collecting by means of ice at the low points. This can bring about structural damage from stress, including the destruction of gutter and drainage systems.

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