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Some building styles, for example, geodesic and A-frame , blur the distinction between wall and roofs. Pitched roofs are often covered with asphalt shingles (in the US) although thatch, wood shake, steel, corrugated galvanised iron, slateAlternate meanings in Slate (disambiguation Slate is a fine-grained homogeneous sedimentary rock composed of clay or volcanic ash which has been metamorphosed (foliated) in layers (bedded deposits). Slate can be made into roofing shingles ('roofing slates and tileA tile is a small, manufactured piece of hard-wearing material such as clay or stone used for covering roofs, floors, and walls, or other objects such as tabletops. The word is derived from the French word tuile which is, in turn, from the Latin word tegu roofs are used elsewhere. Newer systems include solar shingleSolar panels are devices consisting of solar cells that convert light into electricity. They are called solar after the sun or "Sol" because the sun is the most powerful source of the light available for use. The solar cells are sometimes called photovolts which generate electricityElectricity is a property of certain subatomic particles, such as electrons and protons, that gives rise to attractive and repulsive forces between them. It is one of the four fundamental forces of nature, and is a conserved property of matter that can be as well as cover the roof.
Several systems of construction transmit the weight of the roof to the walls of the building and tie the roof into the structure. These include: ashlar-piece, brace (can be arched or wind), collar-beam, crown-post, hammer-beam and -post, king (or queen) post, purlin, rafter (common or principal), ridge beam, ridge-board, strut, tie-beam ( Tie rodA tie rod is a slender structural rod used as a tie and capable of carrying tensile loads only. Since the ratio of its length to the radius of gyration of its cross section is usually very large, it would buckle under the action of compressive forces.), truss, and wall-plate.
By extension one can speak of the roof of a tentA tent is a temporary or semipermanent shelter, consisting of sheets of fabric or other material draped over or attached to a frame of poles. It is fairly easy to assemble pitch or disassemble, and is usually portable. Tents may be attached to the ground, automobileAn automobile usually called a car (an old word for carriage) or a truck is a wheeled vehicle that carries its own engine. Older terms include horseless carriage and motor car with "motor" referring to what is now usually called the engine. The act of ope, etc. A convertibleConvertible can also refer to a convertible (security A convertible is an automobile built with a folding, retracting, or removable roof. The collapsible roof section is typically made from flexible canvas or vinyl, although plastic, aluminium and steel h is an automobile built with a folding, retracting, or removable roof.