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Why are the walls near the balcony so often wet? Where does this water come from? Using photos from a client of my online consultations as an example, I discuss the causes of leaks on walls near the balcony. Deficiencies in balcony insulation are extremely common, if not common. Balcony repairs and renovations are a huge expense for housing communities. The quality of balcony insulation is embarrassingly low. 0:00 Intro 0:05 Damp plaster on the wall near the balcony 0:18 Where does water come from in the apartment? 0:57 No waterproofing on the balcony 1:40 Cross-section of the ceiling and floor layers of the balcony and apartment 1:56 Discussion of the structure, damage and leak 5:11 Photos from the construction site - poorly made balcony insulation 6:11 Balcony slope layer and polystyrene without insulation 6:35 Leaks into the apartment under the balcony 8:04 Flooding from balconies in new buildings 8:18 Photos from the new balcony and its renovation Useful links https://inblock.com.pl https://inblock.com.pl/blog/ https://inblock.com.pl/sklep/