They are available both in pure form, that is made of one material, and in all sorts of bizarre combinations, such as metal and plastic. Wood – material for us familiar and well-proven. Wood excellent protection against cold and unnecessary noise. This is a fairly durable material. Environmentally friendly wood is well known to all. True, few people think that this environmentally friendly, you can easily wipe out low-quality paints, varnishes and impregnation.
Wood requires a real hard pre-processing and rejection, so there are wooden windows is not cheap, about twice as expensive than the same window, but with a frame made of pvc. More expensive luxury box made of fine laminated timber – oak, European beech, mahogany. The appearance of plastic windows pushed from the market, wooden frame. pvc (polyvinyl chloride) – a practical, robust, durable and inexpensive material. Heat and soundproof properties, it is not inferior wood. Moreover, now pvc is environmentally safe, even at the stage of production and utilization. The fact that recently appeared recipe 'green line', introduced on all German industries kbe (a leader in the Russian market of plastic profiles for windows and doors). The technique involves the use of only 'lead free' stabilizers that are based on environmentally friendly compounds of calcium – zinc (CZn). In Germany, window of a safe plastic meet the new requirements of the Commission on the Environment of the European Union, under which up to 2006 pvc profile should significantly reduce the use of lead compounds. Aluminum frames, characterized the increased strength, the most useful for large window openings, for example, stained glass and glass balconies.
