A roof is part of your building envelope. It is the covering on the uppermost part of the building or shelter which provides protection from pets and weather, rain or snow notably, but heat also, wind and sunlight. The term denotes the framing or structure which helps that covering also.[1]The characteristics of an roof are centered upon the purpose of the building which it covers, the available roof materials and the local traditions of building and wider principles of architectural design and practice and may also be governed by local or countrywide legislation. In most countries a roof protects mainly against rain. A verandah might be roofed with material that helps to protect against natural light but admits the other elements. The roof of a garden conservatory protects plants from cold, wind, and rain, but admits light.
Shack made of date palm branches at Neot Semadar, IsraelA roofing may also provide additional living space, for example a roof garden.The elements in the design of a roof structure are:the materialthe constructionthe durabilityThe material of a roof may range from banana leaves, wheaten straw or seagrass to laminated goblet, copper (see: copper roof), aluminium sheeting and pre-cast concrete. In many parts of the planet ceramic tiles have been the predominant roofer material for years and years, if not millennia. Other roof covering materials include asphalt, coal tar pitch, EPDM rubber, Hypalon, reboundable foam, PVC, slate, Teflon cloth, TPO, and lumber shingles and shakes.
The construction of a roof depends upon its approach to support and how the underneath space is bridged and whether or not the roof top is pitched. The pitch is the angle at which the roof increases from its lowest 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 might take away the need for pitch, roofs are pitched for reasons of traditions and appearance. So the pitch is dependent upon stylistic factors partly, and to do with practicalities partially.
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 over a steeply pitched roof but provide excellent weather protection at a comparatively low angle. In locations where there is little rainfall, an almost chiseled roof with hook run-off provides enough protection against an intermittent downpour. Drainpipes take away the need for a sloping roof top also.
A person that specializes in roof structure construction is named a roofer.The durability of an roofing is a matter of matter because the roof structure is usually the least accessible part of any building for purposes of repair and renewal, while its harm or destruction can have serious results.
Because the purpose of a roofing is to safeguard people and their belongings from climatic elements, the insulating properties of any roof top are a concern in its composition and the choice of roofing material.Some roof covering materials, those of natural fibrous materials especially, such as thatch, have excellent insulating properties. For those that do not, extra insulation is often installed under the outer covering. In developed countries, the majority of 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, noise, mud 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 giving a space between the tiles and the roof covering surface, it can reduce heat caused by sunlight.Forms of insulation are thought or plastic material 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 can be inserted or sprayed into roof cavities. So called Cool roofs are becoming popular ever more, and in some cases are mandated by local codes. Cool roofs are thought as roofs with both high reflectivity and high thermal emittance.
Poorly protected and ventilated roof can suffer from problems including the formation of ice dams round the overhanging eaves in winter, causing water from melted snow on higher elements of the roof top to permeate the roofing materials. Ice dams take place when high temperature escapes through the uppermost area of the roof, and the snow at those true factors melts, refreezing as it drips across the shingles, and collecting in the form of ice at the low points. This may lead to structural damage from stress, including the destruction of drainage and gutter systems.
Roof Design Ideas Get Inspired by photos of Roofs from Australian
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Technology Lecture Roof Construction 23/01/14 folio
Roof Design Ideas Get Inspired by photos of Roofs from Australian
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