The roof is one of the most important structures of the building since its durability determines the building’s lifetime and operational reliability. The roof has to carry the loads arising from rain, snow and wind as well as the occasional movement of persons. Therefore the roof has to be built rigidly enough. The top layers of the roof have to withstand large variations in temperature (from the hot sun in summer and low temperatures in winter) and transfer precipitation from the roof into the drainage system.

The roofs of wooden frame element houses are usually built in three ways: using rafters, nail-plate roof trusses or elements.

Using rafters for building a roof is the traditional way that can nowadays be accomplished even more effectively using factory-produced rafters. Despite the use of factory-calibrated and exactly cut rafters for building the roof it is still labour-intensive and time-consuming. That is why we mainly offer roof elements for roof construction, but for some complex roof designs the use of rafters is still the only option.

The constructive composition of the roof in terms of the materials used is the same irrespective of whether roof elements, rafters or nail-plate roof trusses are used. With regard to roof elements, most of the material installation is done at the factory.