A roof structure is part of your building envelope. It is the covering on the uppermost part of a building or shelter which gives protection from animals and weather, rain or snow notably, but heat also, sunlight and wind. The term also denotes the framing or structure which supports that covering.[1]The characteristics of any roof are based mostly upon the purpose of the building so it protects, the available roof materials and the local traditions of structure and wider principles of architectural design and practice and could also be governed by local or national legislation. In most countries a roof protects mostly against rain. A verandah might be roofed with materials that defends against natural light 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 could also provide additional living space, for example a rooftop garden.The elements in the look of a roof top are:the materialthe constructionthe durabilityThe material of your roof may range from banana leaves, wheaten straw or seagrass to laminated goblet, copper (see: copper roofing), aluminium sheeting and pre-cast cement. In many parts of the globe 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 silicone, Hypalon, reboundable foam, PVC, slate, Teflon fabric, TPO, and real wood shingles and shakes.
The construction of the roof depends upon its approach to support and how the underneath space is bridged and set up roof is pitched. The pitch is the angle at which the roof goes up from its least expensive to highest point. Most US domestic architecture, except in very dried out parts, has roofs that are sloped, or pitched. Although modern construction elements such as drainpipes might remove the dependence on pitch, roofs are pitched for reasons of aesthetics and tradition. So the pitch is partly dependent upon stylistic factors, also to do with practicalities partially.
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 on a steeply pitched roof but provide excellent weather protection at a relatively low angle. In regions where there is little rainfall, an almost toned roof with a slight run-off provides adequate protection against an intermittent downpour. Drainpipes remove the dependence on a sloping roof also.
A person that specializes in roofing construction is called a roofer.The durability of any roofing is a matter of matter because the roof structure is often the least accessible part of an building for purposes of repair and renewal, while its damage or devastation can have serious results.
Because the reason for a rooftop is to safeguard people and their possessions from climatic elements, the insulating properties of an roofing are a consideration in its structure and the decision of roofing materials.Some roof materials, particularly those of natural fibrous materials, such as thatch, have excellent insulating properties. For all those that not, extra insulation is installed under the outer coating often. 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 warmth and cold, sound, mud and frequently from the lice and droppings of birds who frequently choose roofs as nesting places.
Concrete tiles can be used as insulation. When installed giving a space between the tiles and the roofing surface, it can reduce heating caused by the sun.Forms of insulation are vinyl or felt 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 progressively more 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 glaciers dams across the overhanging eaves in cold weather, causing drinking water from melted snow on top parts of the roofing to penetrate the roofing material. Ice dams occur when warmth escapes through the uppermost area of the roof, and the snow at those factors melts, refreezing as it drips across the shingles, and collecting in the form of ice at the low points. This can result in structural damage from stress, like the destruction of gutter and drainage systems.
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