A roof top is part of your building envelope. It is the covering on the uppermost part of your building or shelter which gives protection from family pets and weather, notably rain or snow, but also heat, wind and sunlight. The word also denotes the framing or structure which supports that covering.[1]The characteristics of the roof are dependent upon the goal of the building it includes, the available roof covering materials and the neighborhood traditions of building and wider ideas 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 any garden conservatory protects plants from cold, wind, and rain, but admits light.
Shack made of date hand branches at Neot Semadar, IsraelA roof covering may provide additional liveable space, for example a roofing garden.The elements in the look of a rooftop are:the materialthe constructionthe durabilityThe material of an roof may range between banana leaves, wheaten straw or seagrass to laminated wine glass, copper (see: copper roof), aluminium sheeting and pre-cast concrete. In many parts of the global world ceramic tiles have been the predominant roofer materials for years and years, if not millennia. Other roof covering materials include asphalt, coal tar pitch, EPDM rubber, Hypalon, polyurethane foam, PVC, slate, Teflon textile, TPO, and solid wood shakes and shingles.
The construction of a roof depends upon its method of support and the way the underneath space is bridged and whether or not the roof top is pitched. The pitch is the perspective of which the roof goes up from its most affordable to highest point. Most US home structures, except in very dry areas, has roofs that are sloped, or pitched. Although modern development elements such as drainpipes may take away the dependence on pitch, roofs are pitched for reasons of tradition and looks. So the pitch is partly dependent after stylistic factors, and partially to do with practicalities.
Some types of roof covering, for example thatch, require 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 comparatively low angle. In regions where there is little rainwater, an almost flat roof with hook run-off provides sufficient protection against an occasional downpour. Drainpipes also remove the need for a sloping rooftop.
Somebody who specializes in roof top construction is called a roofer.The durability of a roof is a subject of concern because the roof is usually the least accessible part of any building for purposes of repair and renewal, while its destruction or destruction can have serious results.
Because the purpose of a roof covering is to safeguard people and their property from climatic elements, the insulating properties of an roof top are a factor in its composition and the choice of roofing material.Some roofer materials, those of natural fibrous material especially, such as thatch, have excellent insulating properties. For those that do not, extra insulation is often installed under the external layer. In developed countries, the majority of dwellings have a ceiling installed under the structural members of the roof. The purpose of a ceiling is to insulate against heat and cold, sound, mud 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 roof surface, it can reduce heating system caused by the sun.Types of insulation are sensed or clear plastic sheeting, sometimes with a reflective surface, installed below the tiles or other materials straight; 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 more and more, and in some instances are mandated by local codes. Cool roofs are defined as roofs with both high reflectivity and high thermal emittance.
Poorly protected and ventilated roof can suffer from problems including the formation of ice dams about the overhanging eaves in winter, causing drinking water from melted snow on higher parts of the roofing to penetrate the roofing materials. Ice dams take place when high temperature escapes through the uppermost area of the roof, and the snow at those tips melts, refreezing as it drips along the shingles, and collecting by means of ice at the low points. This can result in structural harm from stress, like the damage of gutter and drainage systems.
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