A roof structure is part of the building envelope. It is the covering on the uppermost part of your 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 your roof are based mostly upon the purpose of the building so it includes, the available roof materials and the local traditions of construction and wider ideas of architectural design and practice and could also be governed by local or countrywide legislation. In most countries a roof protects generally against rain. A verandah might be roofed with materials that defends against sun rays 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 roofing might provide additional liveable space, for example a rooftop garden.The elements in the look of a roof structure are:the materialthe constructionthe durabilityThe material of a roof may range between banana leaves, wheaten straw or seagrass to laminated cup, copper (see: copper roof covering), aluminium sheeting and pre-cast concrete. In many parts of the planet ceramic tiles have been the predominant roof covering materials for years and years, if not millennia. Other roof covering materials include asphalt, coal tar pitch, EPDM plastic, Hypalon, polyurethane foam, PVC, slate, Teflon cloth, TPO, and lumber shakes and shingles.
The construction of an roof is determined by its method of support and the way the underneath space is bridged and whether or not the roof top is pitched. The pitch is the perspective of which the roof goes up from its most affordable to highest point. Most US home structures, except in very dried regions, has roofs that are sloped, or pitched. Although modern construction elements such as drainpipes may remove the need for pitch, roofs are pitched for reasons of looks and custom. So the pitch is partly dependent upon stylistic factors, and to do with practicalities partly.
Some types of roof covering, for example thatch, require a steep pitch in order to be waterproof and durable. 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 regions where there is little rainwater, an almost even roof with a slight run-off provides satisfactory protection against an occasional downpour. Drainpipes remove the need for a sloping roof covering also.
Somebody who specializes in roofing construction is called a roofer.The durability of a roof is a subject of concern because the roof top is usually the least accessible part of the building for purposes of repair and renewal, while its damage or destruction can have serious effects.
Because the reason for a roof structure is to safeguard people and their property from climatic elements, the insulating properties of the roofing are a concern in its framework and the choice of roofing material.Some roofer materials, those of natural fibrous material specifically, such as thatch, have excellent insulating properties. For all those that not, extra insulation is installed under the external covering often. In developed countries, the majority of dwellings have a ceiling installed under the structural members of the roof. The goal of a ceiling is to insulate against heat and cold, noises, dirt and grime and often from the droppings and lice of birds who frequently choose roofs as nesting places.
Cement tiles can be used as insulation. When installed departing a space between your tiles and the roof covering surface, it can reduce home heating caused by the sun.Types of insulation are believed or plastic material sheeting, sometimes with a reflective surface, installed below the tiles or other material 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 progressively popular, and in some instances are mandated by local codes. Cool roofs are defined as roofs with both high reflectivity and high thermal emittance.
Poorly covered and ventilated roof covering can have problems with problems like the formation of ice dams around the overhanging eaves in cold weather, causing water from melted snow on upper parts of the roof covering to permeate the roofing material. Ice dams happen when temperature escapes through the uppermost part of the roof, and the snow at those true tips melts, refreezing as it drips along the shingles, and collecting by means of ice at the low points. This can bring about structural damage from stress, like the devastation of gutter and drainage systems.
carpenters build conventional rafter roof frames on site the rafters
Valley Rafters intersecting gable roof For the Home Pinterest
Roof Framing Geometry: How to Layout Jack Rafter Side Cut Angles using
markedup common rafter ready to cut as shown in the diagram below
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