PFenestrum also manufactures Sash Spring and Sash Box windows. Based on the latest technologies, safe and exclusive design windows will be suitable for a luxurious, classical style home and heritage site buildings. Most often we export these windows to the UK market, since they are manufactured in accordance with the quality standards and style of this country. Timber Sash spring and Sash box windows are only made by a custom order, they are fitted with full window seals to avoid draughts and rattle.


Sash windows distinguish themselves by design, they recreate an authentic historic style and provide the feeling of an exceptional coziness and comfort. Timber windows can be decorated with wooden decorative items. They are glued directly on the glazing and range from 18 to 22 mm width and from 12 to 19 mm high depending on the thickness of timber window profile.


The window structure consists of two glazed sashes that slide vertically down the wooden frame. They are powered by springs or weights. Timber windows are made from three layer glued timber, and it comes from pine, Meranti, oak or other exotic types of trees. Finish is done by using varnish, stain or paint from recognized paints and coating manufactures such as Teknos (Finland), Sikkens (Netherlands). Finishes also can be in any RAL color.


Windows are available in various glazing bar configurations. There is a wide choice of high quality hardware manufacturers such as Pickard hardware, UK. Windows come double glazed with low E (comes as standard), toughened, laminated glass or obscure glass from one of the leading glass manufacturers Saint Gobain or Pilkington.


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