A roof top is part of your building envelope. It's 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, sunlight and wind. The word also denotes the framing or structure which supports that covering.[1]The characteristics of your roof are based mostly upon the purpose of the building that this covers, the available roofer materials and the local traditions of structure and wider principles 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 may be roofed with material that protects against sunlight but admits the other elements. The roof of an garden conservatory protects plants from cold, wind, and rain, but admits light.
Shack manufactured from date hand branches at Neot Semadar, IsraelA roof top may also provide additional living space, for example a roof garden.The elements in the design of a roofing 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 roof), aluminium sheeting and pre-cast concrete. In lots of parts of the global world ceramic tiles have been the predominant roof materials for years and years, if not millennia. Other roofing materials include asphalt, coal tar pitch, EPDM plastic, Hypalon, polyurethane foam, PVC, slate, Teflon cloth, TPO, and lumber shakes and shingles.
The construction of an roof is determined by its method of support and how the underneath space is bridged and set up roof structure is pitched. The pitch is the angle of which the roof increases from its lowest to highest point. Most US local architecture, except in very dried out areas, has roofs that are sloped, or pitched. Although modern structure elements such as drainpipes might take away the need for pitch, roofs are pitched for reasons of traditions and looks. So the pitch is partly dependent upon stylistic factors, and partially regarding practicalities.
Some types of roofer, for example thatch, need a steep pitch to become waterproof and durable. Other styles 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 rain, an almost flat roof with hook run-off provides sufficient protection against an occasional downpour. Drainpipes remove the dependence on a sloping rooftop also.
Somebody who specializes in roofing construction is called a roofer.The durability of the roof structure is a matter of matter because the roof is usually the least accessible part of any building for purposes of repair and renewal, while its destruction or destruction can have serious effects.
Because the purpose of a roof covering is to protect people and their property from climatic elements, the insulating properties of the rooftop are a thought in its structure and the choice of roofing material.Some roof covering materials, those of natural fibrous materials specifically, such as thatch, have excellent insulating properties. For all those that not, extra insulation is often installed under the exterior coating. 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 high temperature and cold, sound, mud and frequently from the lice and droppings of parrots who frequently choose roofs as nesting places.
Concrete tiles can be used as insulation. When installed leaving a space between your tiles and the rooftop surface, it can reduce warming caused by sunlight.Forms of insulation are plastic or believed sheeting, with a reflective surface sometimes, 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 have become 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 covered and ventilated roofer can suffer from problems like the formation of glaciers dams throughout the overhanging eaves in winter, causing drinking water from melted snow on upper elements of the rooftop to penetrate the roofing materials. Ice dams arise when temperature escapes through the uppermost part of the roof, and the snow at those details melts, refreezing as it drips across the shingles, and collecting in the form of ice at the lower points. This can lead to structural harm from stress, like the devastation of drainage and gutter systems.
Reply 2 on: April 14, 2009, 05:48:55 AM »
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