A roof covering is part of the building envelope. It is the covering on the uppermost part of the building or shelter which gives protection from pets or animals and weather, notably rain or snow, but heat also, wind and sunlight. The term also denotes the framing or structure which supports that covering.[1]The characteristics of your roof are dependent upon the purpose of the building that it includes, the available roof covering materials and the local traditions of building and wider concepts of architectural design and practice and may also be governed by local or nationwide legislation. In most countries a roof protects against rain primarily. A verandah might be roofed with materials that helps to protect against sun rays but admits the other elements. The roof of any garden conservatory protects plants from cold, wind, and rain, but admits light.
Shack manufactured from date palm branches at Neot Semadar, IsraelA roof top may provide additional living space, for example a roofing garden.The elements in the design of a roof covering are:the materialthe constructionthe durabilityThe material of your roof may range from banana leaves, wheaten straw or seagrass to laminated a glass, copper (see: copper roofing), aluminium sheeting and pre-cast concrete. In many parts of the entire world ceramic tiles have been the predominant roof materials for years and years, if not millennia. Other roof covering materials include asphalt, coal tar pitch, EPDM plastic, Hypalon, polyurethane foam, PVC, slate, Teflon cloth, TPO, and real wood shakes and shingles.
The construction of the roof depends upon its approach to support and the way the underneath space is bridged and set up roofing is pitched. The pitch is the perspective at which the roof rises from its minimum to highest point. Most US local structures, except in very dried up parts, has roofs that are sloped, or pitched. Although modern engineering elements such as drainpipes may take away the dependence on pitch, roofs are pitched for reasons of looks and tradition. So the pitch is partly dependent upon stylistic factors, and partially to do with practicalities.
Some types of roofer, 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 a slight run-off provides satisfactory protection against an occasional downpour. Drainpipes also take away the dependence on a sloping roof.
Somebody who specializes in roof structure construction is named a roofer.The durability of an roof is a subject of matter because the rooftop is often the least accessible part of your building for purposes of repair and renewal, while its damage or damage can have serious effects.
Because the purpose of a roof structure is to safeguard people and their belongings from climatic elements, the insulating properties of a roof top are a thought in its framework and the choice of roofing material.Some roof materials, those of natural fibrous material especially, such as thatch, have excellent insulating properties. For all those that not, extra insulation is installed under the outside covering often. In developed countries, the majority of dwellings have a ceiling installed under the structural members of the roof. The purpose of a roof is to insulate against high temperature and cold, noise, dirt and often from the droppings and lice of birds who frequently choose roofs as nesting places.
Cement tiles can be utilized as insulation. When installed leaving a space between the tiles and the roof structure surface, it can reduce heating caused by sunlight.Forms of insulation are felt or plastic sheeting, sometimes with a reflective surface, installed below the tiles or other material 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 are becoming popular progressively more, 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 covering can have problems with problems like the formation of ice dams surrounding the overhanging eaves in cold weather, causing drinking water from melted snow on top parts of the roof to permeate the roofing materials. Ice dams happen when heating escapes through the uppermost part of the roof, and the snow at those true tips melts, refreezing as it drips across the shingles, and collecting in the form of ice at the low points. This may cause structural damage from stress, like the damage of drainage and gutter systems.
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Roofs, Building Roofs, Roof Design amp; Construction, Skylights
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