Description of historical windows
Chamfered window - it is probably the oldest design of a window. It is a double window or a single-layered window, sashes of which are inserted in a massive profile in straight, simple grooves. A chamfered window originated in Scandinavia where this type of window is popular even today. Sashes of a chamfered window usually open outwards and the profile is not embedded in the facade of the building, therefore the sashes are exposed to precipitation. A chamfered window is simply formed without expressive decorative elements. Given the fact that the window opens outwards, it is difficult to provide proper maintenance of the window on the upper floors of the building.
Classical box-type window or lined window - is a historically tested wooden window structure with a frame embedded in the facade plane and having two sashes (inner and outer), both opening inwards. This type of window is, in fact, the only one suitable for buildings built from the XVIII century until 40th of the XX century. Its basic form and material have not changed over time, only the technical design has changed – nowadays, a heat-saving insulating glass unit and one or two rubber sealing contours are often embedded in the inner sash.
In historic buildings, when replacing the worn out box-type windows with 70, 80 and even 90mm thick modern windows, it often turns out that the new window is located in the freezing zone of the exterior wall and the window box gets wet and starts to mould because of the condensate. Due to the large construction depth (up to 200mm and even more) of the box-type window components, this zone is not located inside the room, but rather in the window structure between the sashes, therefore no moisture or mould appears in the window box. Box-type windows produced by FLORA Ltd meet the requirements for the restoration of cultural monuments. We also offer arched box-type windows.
Panes of a box-type window are usually divided using decorative glazing bars, the facade side features decorative cornices and capitals. The outer sash is glazed using silicone; however, decorative glass mouldings are also possible. We apply rubber sealing only to the inner sash to prevent condensation between the sashes and glass from sweating.
If you have to assess and compare the visual appeal of different types of windows, the box-type windows are definitely ranked at the top of the list – it is a magnificent, functional and decorative component, the pride of any facade.
Coupled or Swedish window – it has two joined sashes with shared hinges. They both open together, but must be separated to clean the glasses between sashes. Normally, the sashes of chamfered windows open outwards and the box is not embedded in the facade of the building, so the sashes are exposed to precipitation. The chamfered window has a simple design, without expressive decoration, flat (not embedded in the facade). Such windows were widely used in the XX century. A modern chamfered window has insulating glass units and high-quality sealing integrated in the inner sashes.
The finish system of wooden windows produced by the Finnish company TEKNOS offers environmentally friendly water-based varnishes and paints. The standard offer includes 54 tones of varnish and covering paints according to RAL or NCS catalogues.