A roof is part of the building envelope. It's the covering on the uppermost part of a building or shelter which gives protection from pets and weather, notably rain or snow, but heat also, sunlight and wind. The term denotes the framing or framework which supports that covering also.[1]The characteristics of the roof are centered upon the purpose of the building which it protects, the available roof materials and the local traditions of building and wider ideas of architectural design and practice and could also be governed by local or national legislation. In most countries a roof protects mainly against rain. A verandah might be roofed with materials that protects against sun light but admits the other elements. The roof of the garden conservatory protects plants from cold, wind, and rain, but admits light.
Shack made of date hand branches at Neot Semadar, IsraelA roof top could also provide additional liveable space, for example a roof top garden.The elements in the design of a roof top are:the materialthe constructionthe durabilityThe material of your roof may range between banana leaves, wheaten seagrass or straw to laminated glass, copper (see: copper roof), aluminium sheeting and pre-cast concrete. In many parts of the entire world ceramic tiles have been the predominant roofing material for years and years, if not millennia. Other roof covering materials include asphalt, coal tar pitch, EPDM silicone, Hypalon, polyurethane foam, PVC, slate, Teflon fabric, TPO, and solid wood shakes and shingles.
The construction of an roof is determined by its approach to support and the way the underneath space is bridged and set up roof covering is pitched. The pitch is the position at which the roof increases 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 might remove the need for pitch, roofs are pitched for reasons of appearance and traditions. So the pitch is partly dependent upon stylistic factors, and to do with practicalities partly.
Some types of roofer, for example thatch, require a steep pitch to become waterproof and durable. Other styles of roofing, for example pantiles, are unstable on a steeply pitched roof but provide excellent weather protection at a relatively low angle. In locations where there is little rainfall, an almost toned roof with hook run-off provides enough protection against an intermittent downpour. Drainpipes also take away the need for a sloping roof top.
Somebody who specializes in roof construction is named a roofer.The durability of your roofing is a matter of concern because the rooftop is often the least accessible part of any building for purposes of repair and renewal, while its destruction or devastation can have serious results.
Because the reason for a roof top is to safeguard people and their property from climatic elements, the insulating properties of a roof structure are a thought in its framework and the decision of roofing material.Some roofing materials, those of natural fibrous materials specifically, such as thatch, have excellent insulating properties. For all those that not, extra insulation is installed under the exterior level often. In developed countries, the majority of dwellings have a ceiling installed under the structural members of the roof. The purpose 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.
Concrete tiles can be used as insulation. When installed giving a space between your tiles and the roofing surface, it can reduce heating system caused by the sun.Forms of insulation are plastic or noticed 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 have become progressively popular, and occasionally 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 suffer from problems like the formation of ice dams around the overhanging eaves in cold weather, causing water from melted snow on top elements of the rooftop to permeate the roofing material. Ice dams appear when warmth escapes through the uppermost part of the roof, and the snow at those true tips melts, refreezing as it drips across the shingles, and collecting by means of ice at the lower points. This can lead to structural destruction from stress, like the damage of drainage and gutter systems.
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