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Vinyl siding is plastic exterior siding for a house, used for decoration and weatherproofing, imitating wood clapboard, and used instead of other materials such as aluminum or fiber cement siding. It is an engineered product, manufactured primarily from polyvinyl chloride (PVC) resin. In the UK and New Zealand a similar material is known as uPVC weatherboarding. Approximately 80 percent of its weight is PVC resin, with the remaining 20 percent being ingredients that impart color, opacity, gloss, impact resistance, flexibility, and durability.〔(【引用サイトリンク】url=http://blog.roofingroger.com/certainteed-master-craftsman-education-development-program/ )〕 It is the most commonly installed exterior cladding for residential construction in the United States and Canada.〔 ==History== Vinyl siding was introduced to the exterior market in the late 1950s as a replacement for aluminum siding. It was first produced by an independently owned manufacturing plant called Crane Plastics in Columbus, Ohio. The process was originally done through mono-extrusion, a process of forming the profile from a single material into the desired shape and size. At that time, blending of colors was done manually. This original process made it difficult to produce and install a consistent, quality product. Beginning in the 1970s, the industry changed its formulation to improve the product's production speed, impact resistance, and range of colors. In the following decade, vinyl siding grew steadily in popularity in large part due to its durability, versatility, and ease of maintenance. However, in many European countries, for instance Germany, vinyl (PVC) is rarely used or phased out because of its negative environmental profile. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Vinyl siding」の詳細全文を読む スポンサード リンク
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