A roof is part of your building envelope. It is the covering on the uppermost part of the building or shelter which gives 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 the roof are dependent upon the purpose of the building which it addresses, the available roof covering materials and the neighborhood traditions of building and wider concepts 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 might be roofed with materials that shields against sun light but admits the other elements. The roof of a garden conservatory protects plants from cold, wind, and rain, but admits light.
Shack made of date hand branches at Neot Semadar, IsraelA roof may also provide additional living space, for example a roof top garden.The elements in the design of a roof top are:the materialthe constructionthe durabilityThe material of the roof may range from banana leaves, wheaten seagrass or straw to laminated a glass, copper (see: copper roofer), aluminium sheeting and pre-cast concrete. In many parts of the earth ceramic tiles have been the predominant roofer material for centuries, if not millennia. Other roofing materials include asphalt, coal tar pitch, EPDM rubber, Hypalon, reboundable foam, PVC, slate, Teflon fabric, TPO, and timber shakes and shingles.
The construction of a roof is determined by its method of support and how the underneath space is bridged and set up roof is pitched. The pitch is the angle of which the roof goes up from its lowest to highest point. Most US domestic structures, except in very dried areas, has roofs that are sloped, or pitched. Although modern construction elements such as drainpipes may remove the dependence on pitch, roofs are pitched for reasons of tradition and appearance. So the pitch is partly dependent upon stylistic factors, also to do with practicalities partly.
Some types of roof covering, for example thatch, require a steep pitch to become waterproof and durable. Other types 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 chiseled roof with a slight run-off provides satisfactory protection against an occasional downpour. Drainpipes also remove the need for a sloping roofing.
Somebody who specializes in roofing construction is called a roofer.The durability of a roof structure is a subject of concern because the roof structure is often the least accessible part of an building for purposes of repair and renewal, while its damage or destruction can have serious effects.
Because the reason for a roof top is to protect people and their property from climatic elements, the insulating properties of an roof top are a consideration in its composition and the decision of roofing material.Some roof materials, those of natural fibrous material specifically, such as thatch, have excellent insulating properties. For all those that not, extra insulation is often installed under the outer covering. 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 heating and cold, sound, dirt and grime and frequently from the lice and droppings of birds who frequently choose roofs as nesting places.
Concrete tiles can be used as insulation. When installed departing a space between the tiles and the roof covering surface, it can reduce heating system caused by sunlight.Forms of insulation are vinyl or believed sheeting, sometimes with a reflective surface, installed below the tiles or other materials directly; synthetic foam batting laid above the ceiling and recycled paper products and other such materials that can 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 protected and ventilated roof covering can have problems with problems such as the formation of ice dams surrounding the overhanging eaves in cold weather, causing water from melted snow on higher parts of the roofing to permeate the roofing material. Ice dams appear when heating escapes through the uppermost part of the roof, and the snow at those things melts, refreezing as it drips along the shingles, and collecting in the form of ice at the low points. This may bring about structural harm from stress, like the devastation of drainage and gutter systems.
Roof Framing Geometry: How to Layout Jack Rafter Side Cut Angles using
Rafter plans
Valley Rafters intersecting gable roof For the Home Pinterest
Draw the Hip Rafter Plumb Line @ the End of Hip Rafter Level Line
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