It is no secret that the necessary insulation layer includes the set of high -quality metal doors, and the manufacture of the door frame is carried out using a special brand of steel and an enhanced frame. This feature of the production process is very often the result of a large weight of the structure, and this, in turn, complicates the installation. However, the fasteners provided by the plant often turn out to be not quite excellent quality, as a result of which there is a need to perform additional strengthening, for which additional planks are placed in the box. Nevertheless, not always any door requires strengthening, for example, the Elbor luxury door is equipped with high -quality fittings and elements that contribute to long service and prevent hacking.
