A roofing is part of any building envelope. It's the covering on the uppermost part of a building or shelter which gives protection from pets and weather, rain or snow notably, but heat also, wind and sunlight. The term denotes the framing or framework which helps that covering also.[1]The characteristics of any roof are based mostly upon the goal of the building so it protects, the available roof materials and the local traditions of building and wider concepts of architectural design and practice and could also be governed by local or nationwide legislation. In most countries a roof protects against rain primarily. A verandah might be roofed with material that protects against sunshine but admits the other elements. The roof of the garden conservatory protects plants from cold, wind, and rain, but admits light.
Shack manufactured from date hand branches at Neot Semadar, IsraelA roof structure might provide additional living space, for example a roof garden.The elements in the look of a roof covering are:the materialthe constructionthe durabilityThe material of your roof may range between 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 world ceramic tiles have been the predominant roof covering materials for years and years, if not millennia. Other roofer materials include asphalt, coal tar pitch, EPDM rubber, Hypalon, reboundable foam, PVC, slate, Teflon cloth, TPO, and solid wood shingles and shakes.
The construction of any roof depends upon its method of support and how the underneath space is bridged and set up rooftop is pitched. The pitch is the angle at which the roof increases from its most affordable to highest point. Most US home architecture, except in very dried regions, has roofs that are sloped, or pitched. Although modern building elements such as drainpipes may take away the need for pitch, roofs are pitched for reasons of tradition and appearance. So the pitch is dependent upon stylistic factors partly, and partially to do with practicalities.
Some types of roof, for example thatch, require a steep pitch in order to be waterproof and durable. Other types of roofing, for example pantiles, are unstable on a steeply pitched roof but provide excellent weather protection at a comparatively low angle. In locations where there is little rainwater, an almost even roof with a slight run-off provides enough protection against an occasional downpour. Drainpipes remove the dependence on a sloping roof covering also.
A person that specializes in roof structure construction is called a roofer.The durability of an roof top is a matter of concern because the roof covering is often the least accessible part of any building for purposes of repair and renewal, while its destruction or destruction can have serious effects.
Because the reason for a roof is to protect people and their belongings from climatic elements, the insulating properties of any roof structure are a account in its structure and the choice of roofing materials.Some roof covering materials, especially those of natural fibrous material, such as thatch, have excellent insulating properties. For all those that do not, extra insulation is often installed under the outside covering. In developed countries, the majority of dwellings have a ceiling installed under the structural members of the roof. The goal of a ceiling is to insulate against heating and cold, sound, dirt and grime and frequently from the lice and droppings of parrots who frequently choose roofs as nesting places.
Concrete tiles can be utilized as insulation. When installed leaving a space between your tiles and the roof structure surface, it can reduce warming caused by the sun.Forms of insulation are vinyl or sensed sheeting, sometimes with a reflective surface, installed directly below the tiles or other material; 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 are becoming more and more popular, and in some full cases are mandated by local codes. Cool roofs are thought as roofs with both high reflectivity and high thermal emittance.
Poorly protected and ventilated roofing can have problems with problems like the formation of snow dams surrounding the overhanging eaves in winter, causing normal water from melted snow on top elements of the rooftop to permeate the roofing material. Ice dams arise when temperature escapes through the uppermost area of the roof, and the snow at those tips melts, refreezing as it drips over the shingles, and collecting in the form of ice at the lower points. This may result in structural destruction from stress, like the destruction of drainage and gutter systems.
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Last edited by NorthwoodsMike; 02/03/14 at 12:27 PM .Reason: added pic
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