A roof is part of the building envelope. It's the covering on the uppermost part of the building or shelter which provides protection from pets or animals and weather, rain or snow notably, but also heat, sunlight and wind. The word also denotes the framing or structure which supports that covering.[1]The characteristics of an roof are reliant upon the goal of the building that it protects, the available roofer materials and the local traditions of structure and wider ideas of architectural design and practice and may also be governed by local or national legislation. In most countries a roof protects generally against rain. 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 made of date hand branches at Neot Semadar, IsraelA roofing could also provide additional living space, for example a roofing garden.The elements in the look of a roof structure are:the materialthe constructionthe durabilityThe material of the roof may range between banana leaves, wheaten straw or seagrass to laminated cup, copper (see: copper roof covering), aluminium sheeting and pre-cast concrete. In many parts of the earth ceramic tiles have been the predominant roofing materials for centuries, if not millennia. Other roof covering materials include asphalt, coal tar pitch, EPDM plastic, Hypalon, polyurethane foam, PVC, slate, Teflon fabric, TPO, and wood shingles and shakes.
The construction of any roof is determined by its approach to support and how the underneath space is bridged and set up roof structure is pitched. The pitch is the position of which the roof increases from its lowest to highest point. Most US home structures, except in very dry out areas, has roofs that are sloped, or pitched. Although modern construction elements such as drainpipes may take away the need for pitch, roofs are pitched for reasons of traditions and aesthetics. So the pitch is partly dependent after stylistic factors, also to do with practicalities partially.
Some types of roof covering, for example thatch, need a steep pitch in order to be waterproof and durable. Other types of roofing, for example pantiles, are unstable on the steeply pitched roof but provide excellent weather protection at a comparatively low angle. In parts where there is little rainfall, an almost toned roof with a slight run-off provides satisfactory protection against an occasional downpour. Drainpipes also remove the need for a sloping roof.
Somebody who specializes in roof covering construction is named a roofer.The durability of any roof structure is a matter of concern because the roofing is often the least accessible part of the building for purposes of repair and renewal, while its destruction or destruction can have serious results.
Because the reason for a roof is to protect people and their possessions from climatic elements, the insulating properties of the roofing are a thought in its composition and the choice of roofing materials.Some roof covering materials, especially those of natural fibrous material, such as thatch, have excellent insulating properties. For those that do not, extra insulation is installed under the exterior covering often. 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 warmth and cold, sound, mud and frequently from the lice and droppings of wild birds who frequently choose roofs as nesting places.
Concrete tiles can be used as insulation. When installed going out of a space between your tiles and the roof surface, it can reduce heat caused by the sun.Forms of insulation are plastic material or thought sheeting, sometimes with a reflective surface, installed below the tiles or other material directly; 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 popular ever more, 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 insulated and ventilated roofer can have problems with problems such as the formation of glaciers dams across the overhanging eaves in winter, causing drinking water from melted snow on upper elements of the roof covering to permeate the roofing material. Ice dams occur when temperature 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 can lead to structural destruction from stress, including the destruction of drainage and gutter systems.
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