Flashing is the weatherproofing shielding put around objects which protrude from the roof of a building (such as pipes and chimneys, or the edges of other roofs) to deflect water away from the seams. A roof tiled in imitation of thatch at Croyde, north Devon, England Rooftops in Vietnam Snow on the roof A roof is the top covering of a building that sheds rain or snow, keeping the building interior dry. ... Building is either the act of creating an object assembled from more than one element, or the object itself; see also construction. ... Look up pipe in Wiktionary, the free dictionary. ... A chimney is a system for venting hot gases and smoke from a boiler, stove, furnace or fireplace to the outside atmosphere. ... A girl in a swimming pool full of water Water (from the Old English waeter; c. ... A seam, in sewing, is the line where two pieces of fabric are held together by thread. ...

Its name likely derives from the fact that metal flashing (typically copper or aluminum) reflects flashes of sunlight. Modern flashing may also be rubber or other waterproof synthetic materials, but metal is still frequently used. Hot metal work from a blacksmith Look up Metal in Wiktionary, the free dictionary In chemistry, a metal (Greek: Metallon) is an element that readily forms ions (cations) and has metallic bonds, and metals are sometimes described as a lattice of positive ions (cations) surrounded by a sea of delocolised... General Name, Symbol, Number copper, Cu, 29 Chemical series transition metals Group, Period, Block 11, 4, d Appearance metallic brown Atomic mass 63. ... Aluminum is a soft and lightweight metal with a dull silvery appearance, due to a thin layer of oxidation that forms quickly when it is exposed to air. ... The reflection of sunlight on water Reflection is the abrupt change in direction of a wave front at an interface between two dissimilar media so that the wave front returns into the medium from which it originated. ... Prism splitting light Sunlight in the broad sense is the total spectrum of electromagnetic radiation given off by the Sun. ... Rubber is an elastic hydrocarbon polymer which occurs as a milky emulsion (known as latex) in the sap of a number of plants but can also be produced synthetically. ... Waterproof fabrics are usually natural or synthetic fabrics that are laminated to or coated in some sort of permanently waterproofing material, such as rubber, polyvinyl chloride (PVC), polyurethane (PU), silicone elastomer, and wax. ... In chemistry, the phrase chemical synthesis appears to have one of two meanings. ...