For over a dozen years, Tatran Group has been dealing in the construction of wooden frame structures that are friendly to man and the environment and, depending on the insulation material used, meet the standards of energy-saving or zero-emission buildings.

We use only certified wood and other building materials that, while maintaining the principles of ventilation and impregnation, create a solid, safe and durable construction.

We offer the manufacture, delivery and assembly of high quality prefabricated frame structures. This solution significantly shortens and reduces installation costs, making work on the building independent of atmospheric conditions.

It is possible to provide additional fire protection of wood and additional biological protection of wood against destructive factors such as humidity, insects or fungi and molds.

We offer a prefabricated wooden frame construction for a previously made foundation slab where we anchor finished elements to the substrate.

The walls of the wooden structure are made of attested, planed four-sided, chamber-dried spruce wood of S4S type with a small increment of 45x150mm in a 625mm module with strength class C24. The wall construction is stiffened with a 12mm thick OSB panel and fastened with steel bands as a protection against possible vertical deviation or wind construction.

Ceiling (ceiling joists, if any) is made of attested, planed four-sided, chamber-dried spruce wood of S4S type with a small increment of 45x200mm in a 625mm or 400mm module, depending on static calculations with strength class C24. The joists are mounted on a sheep wool foundation, which reduces vibrations and eliminates thermal bridges. Wooden joists are covered with a milled OSB plate with a thickness of 22mm, which additionally stiffens the structure.

The roof structure is made of rafter made of certified wood, four-sided planed, chamber dried spruce wood KVH type with a small increment of 60x200mm in module 625mm with strength class C24. As additional structural elements (wall sheets, purlins) we use KVH wood with a cross-section of 140x140mm or, respectively, with increased geometry depending on static calculations. The construction meets the building load requirements of 4.5kN / m2 for a 27-degree inclination angle. The roof structure is stiffened with a 12mm thick OSB panel and fastened with steel bands as a protection against possible vertical deviation or wind construction. In addition, the roof is covered with a vapor permeable roof membrane and roofing patches with dimensions of 45x45mm attested planed four-sided, dried chamber-type spruce wood with a small increment in the spacing corresponding to the type of roof sheathing.

There is a possibility of additional covering of external walls of the building with glass fiber on a polyurethane resin or application of thermal insulation paint to increase the thermal resistance (reduction of heat losses) and to perform a compression test of the building.

From the inside, we recommend using natural wool insulation with a heat transfer coefficient of 0.04 W / mK. In addition to thermal insulation properties, sheep wool has excellent sound-absorbing properties, purifies the air, protects against harmful emissions of chemical substances, electromagnetic waves and water veins. It is characterized by high hygroscopicity - it absorbs moisture and releases it when the humidity changes without losing the insulation parameters.

Due to the harmful effect on man in many countries, it is forbidden to use polyurethane-based materials from the inside. Sheep wool is an ideal material for sealing woodwork as a replacement for PU assembly foam.