A roof covering is part of your building envelope. It's the covering on the uppermost part of any building or shelter which provides protection from family pets and weather, rain or snow notably, but also heat, wind and sunlight. The word denotes the framing or structure which supports that covering also.[1]The characteristics of the roof are based mostly upon the goal of the building it protects, the available roof covering materials and the local traditions of development and wider principles of architectural design and practice and may also be governed by local or national legislation. In most countries a roof protects generally against rain. A verandah might be roofed with material that protects against natural light but admits the other elements. The roof of a garden conservatory protects plants from cold, wind, and rain, but admits light.
Shack manufactured from date hand branches at Neot Semadar, IsraelA roof might provide additional living space, for example a roof covering garden.The elements in the design of a roof top 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 roofer), aluminium sheeting and pre-cast concrete. In many parts of the global world ceramic tiles have been the predominant roof covering material for centuries, if not millennia. Other roof materials include asphalt, coal tar pitch, EPDM silicone, Hypalon, polyurethane foam, PVC, slate, Teflon cloth, TPO, and lumber shakes and shingles.
The construction of an roof depends upon its method of support and how the underneath space is bridged and set up roof is pitched. The pitch is the angle at which the roof goes up from its least expensive to highest point. Most US home structures, except in very dry parts, 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 aesthetics and custom. So the pitch is partly dependent after stylistic factors, and partially regarding practicalities.
Some types of roof, for example thatch, need a steep pitch to become 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 parts where there is little rainfall, an almost chiseled roof with hook run-off provides enough protection against an intermittent downpour. Drainpipes also remove the dependence on a sloping roof covering.
Somebody who specializes in roof covering construction is named a roofer.The durability of the roof top is a subject of matter because the roof structure is usually the least accessible part of an building for purposes of repair and renewal, while its devastation or damage can have serious effects.
Because the purpose of a roof covering is to safeguard people and their belongings from climatic elements, the insulating properties of a roof are a consideration in its framework and the decision of roofing materials.Some roofer materials, especially those of natural fibrous materials, such as thatch, have excellent insulating properties. For those that do not, extra insulation is often installed under the exterior part. 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 high temperature and cold, sound, dirt and often from the droppings and lice of birds who frequently choose roofs as nesting places.
Concrete tiles can be used as insulation. When installed going out of a space between the tiles and the roof top surface, it can reduce heating system caused by sunlight.Forms of insulation are felt or plastic material sheeting, with a reflective surface sometimes, installed below the tiles or other materials directly; 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 sometimes 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 have problems with problems including the formation of ice dams throughout the overhanging eaves in winter, causing water from melted snow on top elements of the rooftop to penetrate the roofing materials. Ice dams arise when heating escapes through the uppermost part of the roof, and the snow at those true points melts, refreezing as it drips along the shingles, and collecting in the form of ice at the low points. This can cause structural damage from stress, like the damage of gutter and drainage systems.
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