A roof top is part of the building envelope. It's the covering on the uppermost part of an building or shelter which provides protection from pets and weather, rain or snow notably, but heat also, sunlight and wind. The word also denotes the framing or structure which supports that covering.[1]The characteristics of an roof are centered upon the purpose of the building so it addresses, the available roofing materials and the local traditions of structure and wider principles of architectural design and practice and may also be governed by local or countrywide legislation. In most countries a roof protects primarily against rain. A verandah might be roofed with materials that defends against sun light but admits the other elements. The roof of an garden conservatory protects plants from cold, wind, and rain, but admits light.Shack manufactured from date hand branches at Neot Semadar, IsraelA roof structure may 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 a roof may range from banana leaves, wheaten seagrass or straw to laminated glass, copper (see: copper roofing), aluminium sheeting and pre-cast concrete. In lots of elements of the global world ceramic tiles have been the predominant roofer material for centuries, if not millennia. Other roof materials include asphalt, coal tar pitch, EPDM plastic, Hypalon, polyurethane foam, PVC, slate, Teflon cloth, TPO, and real wood shakes and shingles.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 viewpoint of which the roof increases from its lowest to highest point. Most US domestic structures, except in very dried regions, has roofs that are sloped, or pitched. Although modern building elements such as drainpipes might take away the need for pitch, roofs are pitched for reasons of appearance and tradition. So the pitch is partly dependent upon stylistic factors, and partially regarding practicalities.Some types of roofing, for example thatch, need a steep pitch to become durable and waterproof. Other styles of roofing, for example pantiles, are unstable on the steeply pitched roof but provide excellent weather protection at a relatively low angle. In locations where there is little rainfall, an almost even roof with hook run-off provides enough protection against an intermittent downpour. Drainpipes remove the need for a sloping rooftop also.Somebody who specializes in roofing construction is called a roofer.The durability of any roof structure is a subject of concern because the roof is often the least accessible part of an building for purposes of repair and renewal, while its destruction or damage can have serious effects.Because the reason for a roof covering is to protect people and their possessions from climatic elements, the insulating properties of the roof covering are a factor in its framework and the decision of roofing materials.Some roof materials, especially those of natural fibrous material, such as thatch, have excellent insulating properties. For those that not, extra insulation is often installed under the outside part. In developed countries, the majority of dwellings have a ceiling installed under the structural members of the roof. The purpose of a roof is to insulate against high temperature and cold, noise, dirt and often from the droppings and lice of birds who frequently choose roofs as nesting places.Concrete tiles can be utilized as insulation. When installed going out of a space between your tiles and the rooftop surface, it can reduce heating up caused by sunlight.Types of insulation are plastic or experienced sheeting, with a reflective surface sometimes, installed below the tiles or other materials straight; 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 progressively, 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 covered and ventilated roofer can suffer from problems including the formation of glaciers dams across the overhanging eaves in winter, causing drinking water from melted snow on higher elements of the roof covering to permeate the roofing materials. Ice dams appear when high temperature escapes through the uppermost area of the roof, and the snow at those true points melts, refreezing as it drips over the shingles, and collecting by means of ice at the lower points. This can cause structural harm from stress, like the devastation of drainage and gutter systems. Thanks a lot for reading and visit our blog, do not forget to share this informative article.