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The film presents the implementation of wall insulation step by step. The insulation work begins with the preparation of the walls. MajsterGrunt deep penetrating is applied to a dry and clean substrate. Its task is to improve adhesion, equalize the surface absorbency, strengthen the substrate and eliminate dusting. In the next step, a starting strip is installed above the plinth. Then we start gluing the polystyrene boards. The mortar for gluing polystyrene Styrolep K is used for gluing. This mortar can be used both inside and outside the building. It is frost-resistant, waterproof, vapor-permeable, flexible and has good adhesion. In the next part of the film, the correct principles of gluing polystyrene boards, securing the edges at windows and in the corners of the building are presented. Then the installation of rustications is presented.