A roof is part of an building envelope. It's the covering on the uppermost part of an building or shelter which gives protection from family pets and weather, notably rain or snow, but also heat, wind and sunlight. The term also denotes the framing or structure which supports that covering.[1]The characteristics of a roof are dependent upon the purpose of the building that it protects, the available roof materials and the neighborhood traditions of development and wider ideas of architectural design and practice and may also be governed by local or nationwide legislation. In most countries a roof protects mainly against rain. A verandah might be roofed with material that helps to protect against natural light but admits the other elements. The roof of your garden conservatory protects plants from cold, wind, and rain, but admits light.
Shack made of date hand branches at Neot Semadar, IsraelA roofing could also provide additional liveable space, for example a roof top garden.The elements in the design of a roof are:the materialthe constructionthe durabilityThe material of a roof may range from banana leaves, wheaten seagrass or straw to laminated a glass, copper (see: copper roof covering), aluminium sheeting and pre-cast concrete. In many parts of the entire world ceramic tiles have been the predominant roofing materials for centuries, if not millennia. Other roof covering materials include asphalt, coal tar pitch, EPDM silicone, Hypalon, reboundable foam, PVC, slate, Teflon textile, TPO, and solid wood shakes and shingles.
The construction of any roof is determined by its method of support and the way the underneath space is bridged and whether or not the roof covering is pitched. The pitch is the perspective at which the roof goes up from its lowest to highest point. Most US local structures, except in very dried areas, has roofs that are sloped, or pitched. Although modern building elements such as drainpipes might remove the need for pitch, roofs are pitched for reasons of custom and looks. So the pitch is partly dependent after stylistic factors, and partially to do with practicalities.
Some types of roof, for example thatch, need a steep pitch in order to be durable and waterproof. Other types of roofing, for example pantiles, are unstable on the steeply pitched roof but provide excellent weather protection at a relatively low angle. In areas where there is little rainfall, an almost flat roof with hook run-off provides satisfactory protection against an occasional downpour. Drainpipes also take away the dependence on a sloping rooftop.
Somebody who specializes in roofing construction is called a roofer.The durability of a roof structure is a subject of concern because the rooftop is often the least accessible part of any building for purposes of repair and renewal, while its harm or damage can have serious effects.
Because the purpose of a roof structure is to protect people and their possessions from climatic elements, the insulating properties of the rooftop are a consideration in its framework and the choice of roofing materials.Some roofing materials, particularly those of natural fibrous materials, such as thatch, have excellent insulating properties. For those that not, extra insulation is often installed under the exterior level. In developed countries, nearly all dwellings have a ceiling installed under the structural members of the roof. The purpose of a roof is to insulate against warmth and cold, sound, dirt and often from the droppings and lice of parrots who frequently choose roofs as nesting places.
Concrete tiles can be utilized as insulation. When installed departing a space between your tiles and the roof top surface, it can reduce heating system caused by the sun.Types of insulation are plastic or felt sheeting, sometimes with a reflective surface, installed directly below the tiles or other materials; 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 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 can have problems with problems such as the formation of ice dams throughout the overhanging eaves in winter, causing normal water from melted snow on higher parts of the roof to permeate the roofing material. Ice dams arise when heat 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 low points. This can result in structural destruction from stress, like the devastation of gutter and drainage systems.
Roof Framing Geometry: Pyramid Hip Roof Rafters Equal amp; Unequal
Rafters with Ceiling Joists are often used for smaller roof spans or
Draw the Hip Rafter Plumb Line @ the End of Hip Rafter Level Line
speed the job of rafter or angle layout by using our rafter angle
Thanks for reading and visit our blog, don't forget to share this information.
