A roof covering is part of an building envelope. It is the covering on the uppermost part of an building or shelter which provides protection from pets or animals and weather, notably rain or snow, but heat also, wind and sunlight. The term denotes the framing or composition which supports that covering also.[1]The characteristics of the roof are dependent upon the purpose of the building it covers, the available roof covering materials and the neighborhood traditions of engineering and wider concepts 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 might be roofed with materials that protects against sun light but admits the other elements. The roof of the garden conservatory protects plants from cold, wind, and rain, but admits light.
Shack made of date hand branches at Neot Semadar, IsraelA roof top might provide additional liveable space, for example a roof garden.The elements in the look of a rooftop are:the materialthe constructionthe durabilityThe material of an roof may range from banana leaves, wheaten seagrass or straw to laminated glass, copper (see: copper roof), aluminium sheeting and pre-cast concrete. In lots of parts of the globe ceramic tiles have been the predominant roofing materials for centuries, if not millennia. Other roof materials include asphalt, coal tar pitch, EPDM rubber, Hypalon, polyurethane foam, PVC, slate, Teflon cloth, TPO, and solid wood shakes and shingles.
The construction of any roof depends upon its method of support and how the underneath space is bridged and whether or not the roof structure is pitched. The pitch is the angle of which the roof rises from its minimum to highest point. Most US domestic structures, except in very dried up regions, 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 traditions and aesthetics. So the pitch is partly dependent upon stylistic factors, and partially regarding practicalities.
Some types of roofing, for example thatch, need a steep pitch in order to be durable and waterproof. Other styles of roofing, for example pantiles, are unstable on the steeply pitched roof but provide excellent weather protection at a relatively low angle. In regions where there is little rainwater, an almost chiseled roof with a slight run-off provides adequate protection against an occasional downpour. Drainpipes remove the dependence on a sloping roofing also.
A person that specializes in roofing construction is called a roofer.The durability of your roof top is a subject of matter because the roof structure is usually the least accessible part of the building for purposes of repair and renewal, while its destruction or destruction can have serious results.
Because the purpose of a roof is to protect people and their possessions from climatic elements, the insulating properties of the roof structure are a consideration in its framework and the choice of roofing materials.Some roof materials, especially those of natural fibrous material, such as thatch, have excellent insulating properties. For all those that not, extra insulation is often installed under the exterior part. In developed countries, nearly all dwellings have a ceiling installed under the structural members of the roof. The purpose of a roof is to insulate against warmth and cold, noises, dirt and often from the droppings and lice of birds who frequently choose roofs as nesting places.
Cement tiles can be used as insulation. When installed leaving a space between your tiles and the rooftop surface, it can reduce home heating caused by sunlight.Forms of insulation are noticed or cheap sheeting, with a reflective surface sometimes, installed immediately below the tiles or other materials; 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 have become popular significantly, 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 roofer can suffer from problems including the formation of glaciers dams round the overhanging eaves in winter, causing drinking water from melted snow on higher parts of the rooftop to penetrate the roofing material. Ice dams occur when heating escapes through the uppermost area of the roof, and the snow at those true details melts, refreezing as it drips across the shingles, and collecting by means of ice at the lower points. This can result in structural damage from stress, like the devastation of gutter and drainage systems.
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