A roof is part of the building envelope. It's the covering on the uppermost part of the building or shelter which gives protection from family pets and weather, rain or snow notably, but also heat, wind and sunlight. The term also denotes the framing or structure which supports that covering.[1]The characteristics of any roof are based mostly upon the goal of the building that this includes, the available roofer materials and the local traditions of building and wider concepts 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 natural light but admits the other elements. The roof of any garden conservatory protects plants from cold, wind, and rain, but admits light.Shack manufactured from date hand branches at Neot Semadar, IsraelA roof top may also provide additional living space, for example a roofing garden.The elements in the design of a roof are:the materialthe constructionthe durabilityThe material of any roof may range between banana leaves, wheaten straw or seagrass to laminated goblet, copper (see: copper roofing), aluminium sheeting and pre-cast cement. In lots of parts of the globe ceramic tiles have been the predominant roofing materials for centuries, if not millennia. Other roof covering materials include asphalt, coal tar pitch, EPDM rubber, Hypalon, polyurethane foam, PVC, slate, Teflon cloth, TPO, and timber shakes and shingles.The construction of the roof is determined by its approach to support and the way the underneath space is bridged and set up roof top is pitched. The pitch is the perspective of which the roof goes up from its minimum to highest point. Most US home architecture, except in very dry out regions, has roofs that are sloped, or pitched. Although modern development elements such as drainpipes may remove the dependence on pitch, roofs are pitched for reasons of aesthetics and tradition. So the pitch is dependent after stylistic factors partly, also to do with practicalities partly.Some types of roof, for example thatch, require a steep pitch to become waterproof and durable. Other types of roofing, for example pantiles, are unstable over a steeply pitched roof but provide excellent weather protection at a comparatively low angle. In regions where there is little rainfall, an almost smooth roof with a slight run-off provides enough protection against an occasional downpour. Drainpipes take away the need for a sloping rooftop also.Somebody who specializes in rooftop construction is called a roofer.The durability of an roof top is a matter of concern because the roof structure is usually the least accessible part of your building for purposes of repair and renewal, while its damage or destruction can have serious results.Because the reason for a roofing is to protect people and their belongings from climatic elements, the insulating properties of any roof top are a factor in its framework and the choice of roofing material.Some roof materials, those of natural fibrous materials particularly, such as thatch, have excellent insulating properties. For those that not, extra insulation is often installed under the outside coating. In developed countries, the majority of dwellings have a ceiling installed under the structural members of the roof. The goal of a roof is to insulate against temperature and cold, sound, dirt and grime and often from the lice and droppings of wild birds who frequently choose roofs as nesting places.Concrete tiles can be utilized as insulation. When installed giving a space between your tiles and the roof surface, it can reduce heating caused by sunlight.Forms of insulation are sensed or plastic material sheeting, sometimes with a reflective surface, installed below the tiles or other materials immediately; 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 more and more popular, 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 covered and ventilated roof can suffer from problems such as the formation of ice dams about the overhanging eaves in cold weather, causing normal water from melted snow on top parts of the rooftop to penetrate the roofing materials. Ice dams happen when temperature escapes through the uppermost part of the roof, and the snow at those factors melts, refreezing as it drips along the shingles, and collecting by means of ice at the low points. This can lead to structural harm from stress, including the devastation of gutter and drainage systems. Thanks for reading and visit our blog, don't forget to share this content.