A roof covering is part of your building envelope. It is the covering on the uppermost part of your building or shelter which provides protection from animals and weather, rain or snow notably, but heat also, wind and sunlight. The term also denotes the framing or structure which supports that covering.[1]The characteristics of a roof are based mostly upon the purpose of the building so it includes, the available roofing materials and the local traditions of development and wider principles of architectural design and practice and may also be governed by local or countrywide legislation. In most countries a roof protects mostly against rain. 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 made of date palm branches at Neot Semadar, IsraelA roof top may provide additional living space, for example a roof covering garden.The elements in the look of a roofing are:the materialthe constructionthe durabilityThe material of your roof may range between banana leaves, wheaten straw or seagrass to laminated goblet, copper (see: copper roof covering), aluminium sheeting and pre-cast cement. In lots of parts of the world ceramic tiles have been the predominant roof covering materials for years and years, if not millennia. Other roof materials include asphalt, coal tar pitch, EPDM rubber, Hypalon, reboundable foam, PVC, slate, Teflon textile, TPO, and lumber shingles and shakes.
The construction of the roof is determined by its method of support and the way the underneath space is bridged and whether or not the roofing is pitched. The pitch is the angle at which the roof rises from its lowest to highest point. Most US home structures, except in very dried areas, has roofs that are sloped, or pitched. Although modern development elements such as drainpipes may remove the need for pitch, roofs are pitched for reasons of custom and looks. So the pitch is partly dependent upon stylistic factors, and to do with practicalities partly.
Some types of roofing, for example thatch, require a steep pitch to become waterproof and durable. Other types of roofing, for example pantiles, are unstable over a steeply pitched roof but provide excellent weather protection at a relatively low angle. In regions where there is little rainfall, an almost smooth roof with a slight run-off provides sufficient protection against an intermittent downpour. Drainpipes take away the dependence on a sloping roof also.
A person that specializes in roof covering construction is called a roofer.The durability of an rooftop is a matter of concern because the roof structure is usually the least accessible part of a building for purposes of repair and renewal, while its damage or damage can have serious results.
Because the reason for a roofing is to protect people and their belongings from climatic elements, the insulating properties of the roof are a thought in its composition and the choice of roofing materials.Some roofing materials, particularly those of natural fibrous materials, such as thatch, have excellent insulating properties. For those that do not, extra insulation is often installed under the outer layer. In developed countries, nearly all dwellings have a ceiling installed under the structural members of the roof. The purpose of a roof is to insulate against temperature and cold, sound, mud and often from the droppings and lice of parrots who frequently choose roofs as nesting places.
Concrete tiles can be utilized as insulation. When installed going out of a space between your tiles and the roof top surface, it can reduce heating caused by the sun.Types of insulation are felt or clear plastic sheeting, with a reflective surface sometimes, installed directly below the tiles or other materials; 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 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 covering can suffer from problems like the formation of ice dams around the overhanging eaves in winter, causing normal water from melted snow on upper elements of the roof top to permeate the roofing material. Ice dams appear when warmth 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 by means of ice at the low points. This may bring about structural damage from stress, like the destruction of drainage and gutter systems.
My Construction Industry: December 2013
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