The balcony is a part of your apartment, which initially has no insulation, and is designed as a “cold” room. But in order to increase the area of the apartment, the balcony is included in everyday life, both as a separate room, and combining it with the area of the apartment. In order to use the balcony in the winter, it should be insulated. The insulation of the balcony is a rather complicated process, which includes not only insulation with polystyrene foam, but also mandatory vapor barrier using foamed foil polyethylene.
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First you need to eliminate all sources of drafts and moisture. To do this, carefully inspect the territory of the balcony, propenate all the “weak” places. The main insulation occurs in a circle – ceiling, floor, walls (except the walls adjacent to the apartment). The thickness of the sheets of polystyrene should not be less than 30 mm. The edges of polystyrene have steps for their tight fit to each other. Therefore, try to fix the steps of the step into the step, where it is impossible – the joint is in the joint, process all the seams with mounting foam. Using the “dowel-gribly” we fix the sheets on the surface (2 pieces per sheet are enough). Then absolutely all seams are glued with tape.
Next came the turn of vapor barrier. Polyethylene is cut into pieces of the desired size, with the help of bilateral adhesive tape is attached to polystyrene. The sheets are located so that there are no overlap. All seams are glued with foil tape. The balcony is insulated!