Vertical racks should be attached to the inside of the wall. The frame formed with their help should be filled with fiberglass mats. You can use wooden bars 50 × 50 mm as racks. The most effective will be their installation with a step of 600 mm. The width of one mat, as a rule, is 1200 mm. Accordingly, it must be cut into two equal parts and, setting between the racks, attached to the wall using a stapler. The insulation should fit the most tightly to the wall, otherwise cold air will fall into the space formed between them. This, in turn, is fraught with moisture condensation and its accumulation. As a result — rotting of insulation and walls.
