A roof is part of a building envelope. It is the covering on the uppermost part of any building or shelter which provides protection from pets or animals 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 a roof are dependent upon the goal of the building that this covers, the available roofer materials and the local traditions of building and wider concepts of architectural design and practice and could also be governed by local or national legislation. In most countries a roof protects primarily against rain. A verandah might be roofed with material that helps to protect against sun rays but admits the other elements. The roof of an garden conservatory protects plants from cold, wind, and rain, but admits light.
Shack made of date palm branches at Neot Semadar, IsraelA roof top might provide additional living space, for example a roofing garden.The elements in the look of a roof covering are:the materialthe constructionthe durabilityThe material of an roof may range from banana leaves, wheaten seagrass or straw to laminated wine glass, copper (see: copper roof), aluminium sheeting and pre-cast concrete. In many parts of the world ceramic tiles have been the predominant roof material for centuries, if not millennia. Other roof materials include asphalt, coal tar pitch, EPDM silicone, Hypalon, reboundable foam, PVC, slate, Teflon fabric, TPO, and real wood shingles and shakes.
The construction of an roof is determined by its method of support and the way the underneath space is bridged and whether or not the roof is pitched. The pitch is the viewpoint of which the roof increases from its minimum to highest point. Most US domestic structures, except in very dry out parts, has roofs that are sloped, or pitched. Although modern building elements such as drainpipes might remove the need for pitch, roofs are pitched for reasons of appearance and traditions. So the pitch is dependent after stylistic factors partly, and partially regarding practicalities.
Some types of roof, for example thatch, require a steep pitch to become waterproof and durable. Other styles of roofing, for example pantiles, are unstable on a steeply pitched roof but provide excellent weather protection at a comparatively low angle. In regions where there is little rainwater, an almost level roof with hook run-off provides sufficient protection against an intermittent downpour. Drainpipes remove the need for a sloping roof structure also.
Somebody who specializes in roof structure construction is named a roofer.The durability of any roof structure is a matter of matter because the roof is often the least accessible part of a building for purposes of repair and renewal, while its damage or damage can have serious effects.
Because the purpose of a roofing is to protect people and their belongings from climatic elements, the insulating properties of the roof are a concern in its framework and the choice of roofing material.Some roof materials, particularly those of natural fibrous material, such as thatch, have excellent insulating properties. For all those that not, extra insulation is installed under the exterior covering often. In developed countries, nearly all 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.
Concrete tiles can be used as insulation. When installed departing a space between your tiles and the roof surface, it can reduce warming caused by sunlight.Forms of insulation are sensed or clear plastic 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 progressively popular, and occasionally are mandated by local codes. Cool roofs are thought as roofs with both high reflectivity and high thermal emittance.
Poorly insulated and ventilated roofer can have problems with problems including the formation of snow dams about the overhanging eaves in winter, causing water from melted snow on top elements of the roofing to permeate the roofing materials. Ice dams take place when high temperature escapes through the uppermost part of the roof, and the snow at those true points melts, refreezing as it drips over the shingles, and collecting in the form of ice at the lower points. This can bring about structural damage from stress, including the damage of gutter and drainage systems.
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sloping roof home design by shell building designers thrissur kerala
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roof with a parapet wall this design makes use of an almost flat roof
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