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In today's construction, we are faced with new challenges. In order to save energy and increase economic efficiency, advanced technologies are used in construction, new materials are emerging. Window/door manufacturers are also facing new challenges. In new construction or renovated buildings, we are faced with a situation where windows must be installed in an insulation layer (when the wall consists of several layers - e.g. masonry + insulation layer). More information about installation materials: http://www.vbh.lt More information about installation work: http://www.vkpaslaugos.lt