A roofing is part of an building envelope. It's the covering on the uppermost part of an building or shelter which gives protection from pets and weather, notably rain or snow, but heat also, wind and sunlight. The term denotes the framing or composition which helps that covering also.[1]The characteristics of a roof are centered upon the goal of the building which it addresses, 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 countrywide 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 your garden conservatory protects plants from cold, wind, and rain, but admits light.
Shack manufactured from date hand branches at Neot Semadar, IsraelA roof may provide additional liveable space, for example a roof top garden.The elements in the look of a roof structure are:the materialthe constructionthe durabilityThe material of any roof may range between banana leaves, wheaten seagrass or straw to laminated goblet, copper (see: copper roofer), aluminium sheeting and pre-cast concrete. In lots of parts of the global world ceramic tiles have been the predominant roof covering materials for centuries, if not millennia. Other roof covering materials include asphalt, coal tar pitch, EPDM plastic, Hypalon, reboundable foam, PVC, slate, Teflon textile, TPO, and real wood shakes and shingles.
The construction of any roof depends upon its method of support and how the underneath space is bridged and whether or not the roof structure is pitched. The pitch is the angle of which the roof rises from its least expensive to highest point. Most US local architecture, except in very dried up areas, has roofs that are sloped, or pitched. Although modern structure elements such as drainpipes may take away the dependence on pitch, roofs are pitched for reasons of tradition and looks. So the pitch is partly dependent after stylistic factors, and partially to do with practicalities.
Some types of roof covering, 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 regions where there is little rainfall, an almost chiseled roof with a slight run-off provides adequate protection against an intermittent downpour. Drainpipes also remove the dependence on a sloping rooftop.
A person that specializes in roofing construction is named a roofer.The durability of an roof top is a subject of matter because the rooftop is often the least accessible part of the building for purposes of repair and renewal, while its destruction or harm can have serious effects.
Because the reason for a roof top is to protect people and their possessions from climatic elements, the insulating properties of any roof top are a factor in its composition and the decision of roofing material.Some roof materials, those of natural fibrous material particularly, such as thatch, have excellent insulating properties. For 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 goal of a roof is to insulate against high temperature and cold, sound, dirt and frequently from the droppings and lice of birds who frequently choose roofs as nesting places.
Cement tiles can be utilized as insulation. When installed departing a space between your tiles and the roof top surface, it can reduce heat caused by the sun.Forms of insulation are vinyl or sensed sheeting, with a reflective surface sometimes, installed straight 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 increasingly popular, and in some full cases are mandated by local codes. Cool roofs are defined as roofs with both high reflectivity and high thermal emittance.
Poorly insulated and ventilated roof covering can suffer from problems such as the formation of snow dams throughout the overhanging eaves in winter, causing drinking water from melted snow on upper parts of the roof to penetrate the roofing material. Ice dams occur when heat escapes through the uppermost area of the roof, and the snow at those true things melts, refreezing as it drips across the shingles, and collecting in the form of ice at the low points. This may cause structural destruction from stress, including the damage of drainage and gutter systems.
Metal Roof Houses curved steel roof home by Dutch architects
Two, four, or multi post design. Metal or wood lattice roof system
Metal Roof Design Plans http://www.docstoc.com/docs/4357994/patioroof
metal roof
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