Bonded wood for windows and doors
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The shape and colour of windows and doors should match not only the exterior walls but also interior design elements. However, they must resist changeable weather conditions, temperature fluctuations, as well as humidity and wind power. Their life span is determined by both, the material and structure of the profiles they are constructed from, as well as by the method of wood impregnation and painting.
The basic raw material we use in the manufacture of windows and doors is pinewood. Pinewood is strong and durable, but at the same time flexible and easily workable. Its resistance to moisture is sufficient due to considerable content of resin. Furthermore, it is easy to impregnate and paint both with paint or varnish. Higher standard woodwork is made from sawn oak or exotic timber such as mahogany (meranti).

One of the most unwanted defects of wood is warping when absorbing and releasing moisture. The best way to eliminate this phenomenon proved to be strip bonding of sections. The strips are bonded so that the internal stresses in the wood were set off and the section - so-called calcinated square timber - remained straight despite changeable ambient conditions. Calcinated square timber used to produce wooden window frames is made from carefully selected pinewood.
Suitable pine timber is selected and sawn with the final product in mind. Sawn timber obtained this way has the correct growth ring arrangement and thickness for the type of section it is designed for. Sawing is immediately followed by drying in special drying chambers until the correct level of moisture (i.e. 12%) is achieved. The timber is now ready for production processing: knots and other defects reducing strength qualities are eliminated and the final clear pieces of wood are joined by means of micro dovetails and laminated. It should be emphasised that bonded wood is characterised by better technical parameters than solid wood with the same section. Our production of bonded wood involves processing by means of state-of-the-art machinery and equipment such as high precision woodworking machines, planers, hydraulic presses, sawing machines and adhesive spreaders. An essential element of bonded wood production process is continuing very strict quality control following successive stages of production.
Our business offer is mostly designed for manufacturers of windows and doors, furniture and wooden houses. Standard sizes are 72 x 86, 72 x 105, and 72 x 145 mm. Other sizes are custom made.
The wood used as raw material for the production of window sections is protected against weather conditions, insects, fungi and UV radiation. The wood we produce undergoes hydrodynamic treatment.
The durability of our wood is further increased by application of finish varnish or paint coating. The coating is applied in three layers: primer, undercoater and finish layer. The overall thickness of layers in the translucent coating, that is, coating through which you can see growth rings, is 60-80 micrometers, and of the solid colour – 100-120 micrometers. The window coating must be reapplied from time to time not only for aesthetic reasons but also to prevent the protective layer from being damaged.
It should be remembered that windows with translucent coating should have it reapplied more or less every three years. The solid colour coating, and in particular light coloured one, will have to be reapplied only every five years.

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