A roof covering is part of an building envelope. It is the covering on the uppermost part of any building or shelter which gives protection from family pets and weather, notably rain or snow, but also heat, wind and sunlight. The word also denotes the framing or structure which supports that covering.[1]The characteristics of any roof are dependent upon the goal of the building which it covers, the available roof covering materials and the local traditions of development and wider ideas of architectural design and practice and may also be governed by local or national legislation. In most countries a roof protects mostly against rain. 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 made of date palm branches at Neot Semadar, IsraelA roof might provide additional living space, for example a roof top garden.The elements in the look of a roof covering are:the materialthe constructionthe durabilityThe material of any 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 lots of parts of the globe ceramic tiles have been the predominant roofer material for centuries, if not millennia. Other roof covering materials include asphalt, coal tar pitch, EPDM rubber, Hypalon, polyurethane foam, PVC, slate, Teflon textile, TPO, and solid wood shingles and shakes.
The construction of a roof depends upon its method of support and how the underneath space is bridged and set up rooftop is pitched. The pitch is the angle of which the roof goes up from its lowest to highest point. Most US home structures, except in very dried regions, has roofs that are sloped, or pitched. Although modern building elements such as drainpipes may take away the dependence on pitch, roofs are pitched for reasons of aesthetics and traditions. So the pitch is partly dependent after stylistic factors, also to do with practicalities partially.
Some types of roofing, for example thatch, need 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 toned roof with a slight run-off provides adequate protection against an intermittent downpour. Drainpipes take away the need for a sloping roofing also.
Somebody who specializes in roof covering construction is named a roofer.The durability of your roof covering is a subject of concern because the roof is usually the least accessible part of a building for purposes of repair and renewal, while its damage or destruction can have serious results.
Because the reason for a roof is to protect people and their belongings from climatic elements, the insulating properties of a roof top are a account in its framework and the choice of roofing material.Some roof covering materials, those of natural fibrous material especially, such as thatch, have excellent insulating properties. For all those that not, extra insulation is installed under the outer layer often. 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 warmth and cold, noise, dirt and often from the lice and droppings of birds who frequently choose roofs as nesting places.
Cement tiles can be utilized as insulation. When installed leaving a space between the tiles and the roofing surface, it can reduce home heating caused by sunlight.Forms of insulation are believed or plastic sheeting, sometimes with a reflective surface, 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 popular more and more, and in some cases are mandated by local codes. Cool roofs are defined as roofs with both high reflectivity and high thermal emittance.
Poorly insulated and ventilated roofing can suffer from problems like the formation of ice dams about the overhanging eaves in cold weather, causing drinking water from melted snow on top parts of the roof to permeate the roofing material. Ice dams arise when heating escapes through the uppermost area of the roof, and the snow at those true details melts, refreezing as it drips across the shingles, and collecting by means of ice at the lower points. This may bring about structural harm from stress, like the destruction of gutter and drainage systems.
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