A rooftop is part of an building envelope. It is the covering on the uppermost part of the building or shelter which gives protection from pets or animals and weather, rain or snow notably, but also heat, wind and sunlight. The word also denotes the framing or structure which supports that covering.[1]The characteristics of the roof are dependent upon the purpose of the building so it includes, the available roof covering materials and the local traditions of engineering and wider ideas of architectural design and practice and could also be governed by local or countrywide legislation. In most countries a roof protects against rain primarily. A verandah may be roofed with material that protects against sunlight but admits the other elements. The roof of any garden conservatory protects plants from cold, wind, and rain, but admits light.Shack made of date palm branches at Neot Semadar, IsraelA roof structure could also provide additional living space, for example a roof garden.The elements in the design of a roof covering are:the materialthe constructionthe durabilityThe material of an roof may range between 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 roof material for years and years, if not millennia. Other roofing materials include asphalt, coal tar pitch, EPDM plastic, Hypalon, polyurethane foam, PVC, slate, Teflon fabric, TPO, and real wood shakes and shingles.The construction of the roof is determined by its approach to support and the way the underneath space is bridged and whether or not the roof structure is pitched. The pitch is the viewpoint of which the roof increases from its most affordable to highest point. Most US local structures, except in very dried up locations, has roofs that are sloped, or pitched. Although modern development elements such as drainpipes might take away the dependence on pitch, roofs are pitched for reasons of traditions and aesthetics. So the pitch is dependent after stylistic factors partly, and partially to do with practicalities.Some types of roofing, for example thatch, require a steep pitch to become durable and waterproof. 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 areas where there is little rain, an almost toned roof with hook run-off provides adequate protection against an intermittent downpour. Drainpipes also take away the dependence on a sloping roofing.A person that specializes in roof structure construction is called a roofer.The durability of any rooftop is a matter of concern because the roofing is usually the least accessible part of the building for purposes of repair and renewal, while its harm or destruction can have serious effects.Because the reason for a roof top is to protect people and their belongings from climatic elements, the insulating properties of your roof top are a awareness in its composition and the decision of roofing material.Some roof materials, those of natural fibrous materials particularly, such as thatch, have excellent insulating properties. For those that do not, extra insulation is installed under the outside part 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, noises, dirt and grime and often from the droppings and lice of wild birds who frequently choose roofs as nesting places.Concrete tiles can be utilized as insulation. When installed going out of a space between the tiles and the rooftop surface, it can reduce heating system caused by sunlight.Forms of insulation are believed or cheap 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 have become popular progressively more, and in some instances are mandated by local codes. Cool roofs are thought as roofs with both high reflectivity and high thermal emittance.Poorly covered and ventilated roofing can suffer from problems such as the formation of ice dams surrounding the overhanging eaves in cold weather, causing drinking water from melted snow on upper elements of the roof to penetrate the roofing materials. Ice dams happen when heating escapes through the uppermost part of the roof, and the snow at those true tips melts, refreezing as it drips across the shingles, and collecting by means of ice at the lower points. This can result in structural harm from stress, including the devastation of drainage and gutter systems. Thanks for reading and visit our blog, do not forget to share this informative article.