A roof covering is part of a building envelope. It's the covering on the uppermost part of an building or shelter which provides protection from animals and weather, rain or snow notably, but heat also, wind and sunlight. The word also denotes the framing or structure which supports that covering.[1]The characteristics of your roof are dependent upon the purpose of the building which it protects, the available roofer materials and the neighborhood traditions of construction and wider principles of architectural design and practice and could also be governed by local or national 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 your garden conservatory protects plants from cold, wind, and rain, but admits light.
Shack made of date hand branches at Neot Semadar, IsraelA roof covering may provide additional liveable space, for example a roof garden.The elements in the design of a roof top are:the materialthe constructionthe durabilityThe material of a roof may range from banana leaves, wheaten straw or seagrass to laminated a glass, copper (see: copper roof covering), aluminium sheeting and pre-cast concrete. In lots of parts of the global world ceramic tiles have been the predominant roof material for years and years, if not millennia. Other roof materials include asphalt, coal tar pitch, EPDM silicone, Hypalon, reboundable foam, PVC, slate, Teflon fabric, TPO, and lumber shingles and shakes.
The construction of the roof depends upon its method of support and the way the underneath space is bridged and whether or not the roof is pitched. The pitch is the angle of which the roof goes up from its least expensive to highest point. Most US home architecture, except in very dried areas, has roofs that are sloped, or pitched. Although modern construction elements such as drainpipes might remove the dependence on pitch, roofs are pitched for reasons of tradition and looks. So the pitch is dependent upon stylistic factors partly, and partially to do with practicalities.
Some types of roof covering, for example thatch, need a steep pitch in order to be durable and waterproof. 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 rainfall, an almost chiseled roof with hook run-off provides enough protection against an occasional downpour. Drainpipes also remove the need for a sloping roof covering.
Somebody who specializes in roof structure construction is named a roofer.The durability of a rooftop is a subject of concern because the rooftop is often the least accessible part of an building for purposes of repair and renewal, while its harm or devastation can have serious results.
Because the purpose of a roof covering is to safeguard people and their property from climatic elements, the insulating properties of a rooftop are a consideration in its structure and the decision of roofing materials.Some roof materials, specifically those of natural fibrous materials, such as thatch, have excellent insulating properties. For those that do not, extra insulation is installed under the outer level 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 heating and cold, noises, dirt and frequently from the lice and droppings 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 heat caused by the sun.Types of insulation are vinyl or thought sheeting, with a reflective surface sometimes, installed directly below the tiles or other material; 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 have become 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 insulated and ventilated roofing can suffer from problems like the formation of ice dams around the overhanging eaves in winter, causing water from melted snow on upper elements of the rooftop to permeate the roofing materials. Ice dams appear when temperature escapes through the uppermost area of the roof, and the snow at those true tips melts, refreezing as it drips along the shingles, and collecting in the form of ice at the low points. This may result in structural harm from stress, including the damage of drainage and gutter systems.
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