A roof top is part of the building envelope. It's the covering on the uppermost part of any building or shelter which provides protection from animals and weather, rain or snow notably, but heat also, sunlight and wind. The term denotes the framing or structure which supports that covering also.[1]The characteristics of your roof are based mostly upon the purpose of the building so it covers, the available roof covering materials and the local traditions of construction and wider principles of architectural design and practice and could also be governed by local or nationwide legislation. In most countries a roof protects primarily against rain. 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 hand branches at Neot Semadar, IsraelA roof might provide additional liveable space, for example a roof garden.The elements in the look of a roof structure are:the materialthe constructionthe durabilityThe material of any roof may range between banana leaves, wheaten seagrass or straw to laminated goblet, copper (see: copper roofer), aluminium sheeting and pre-cast concrete. In many parts of the world ceramic tiles have been the predominant roof covering materials for centuries, if not millennia. Other roof materials include asphalt, coal tar pitch, EPDM rubber, Hypalon, reboundable foam, PVC, slate, Teflon textile, TPO, and solid wood shakes and shingles.
The construction of an roof is determined by its approach to support and how the underneath space is bridged and whether or not the roof covering is pitched. The pitch is the position of which the roof goes up from its minimum to highest point. Most US domestic architecture, except in very dry locations, has roofs that are sloped, or pitched. Although modern engineering elements such as drainpipes may remove the dependence on pitch, roofs are pitched for reasons of looks and tradition. So the pitch is dependent upon stylistic factors partly, also to do with practicalities partly.
Some types of roof, for example thatch, need a steep pitch in order to be waterproof and durable. Other styles of roofing, for example pantiles, are unstable over a steeply pitched roof but provide excellent weather protection at a relatively low angle. In locations where there is little rainwater, an almost level roof with hook run-off provides adequate protection against an intermittent downpour. Drainpipes remove the need for a sloping roofing also.
A person that specializes in roof covering construction is called a roofer.The durability of your rooftop is a subject of matter because the rooftop is usually the least accessible part of any building for purposes of repair and renewal, while its damage or harm can have serious results.
Because the purpose of a roof is to protect people and their belongings from climatic elements, the insulating properties of the rooftop are a factor in its composition and the decision of roofing material.Some roofing materials, those of natural fibrous material specifically, such as thatch, have excellent insulating properties. For those that not, extra insulation is often installed under the exterior layer. In developed countries, nearly all dwellings have a ceiling installed under the structural members of the roof. The goal of a roof is to insulate against temperature and cold, noise, dirt and grime and often from the lice and droppings of parrots who frequently choose roofs as nesting places.
Cement tiles can be used as insulation. When installed giving a space between the tiles and the roof covering surface, it can reduce home heating caused by the sun.Types of insulation are clear plastic or noticed sheeting, with a reflective surface sometimes, installed below the tiles or other material immediately; synthetic foam batting laid above the ceiling and recycled paper products and other such materials that may be inserted or sprayed into roof cavities. So called Cool roofs have become ever more popular, and in some instances are mandated by local codes. Cool roofs are defined as roofs with both high reflectivity and high thermal emittance.
Poorly covered and ventilated roof can suffer from problems including the formation of ice dams round the overhanging eaves in winter, causing water from melted snow on higher elements of the roof structure to permeate the roofing material. Ice dams appear when heating escapes through the uppermost part of the roof, and the snow at those details melts, refreezing as it drips along the shingles, and collecting by means of ice at the lower points. This may lead to structural harm from stress, like the damage of gutter and drainage systems.
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