title: [Moisture and mold on the inner walls of prefabricated building slabs--investigating a strange cause].
abstract: Reasons for indoor-moisture beyond the normal level can be caused by penetrating dampness, condensation-water, and apartment misuse. A fall in the air temperature below the dew point in connection with moulding inside buildings becomes evident mostly at places like badly insulated outer-walls or room-corners. In a number of houses built between 1980 and 1983 in the so called "Plattenbauweise" (prefabricated slabs), exclusively the inner-walls were covered in mould around cracks in the walls. Examinations showed connections between the apartment and the outer-corridor with a slight exchange of air through the cracks. Warm, wet air escaped from the apartment into the outer-corridor, and cold air entered the apartment from the outer-corridor. This temporary fall below the dewpoint caused by suitable variation of temperature probably resulted in the building materials and wallpapers becoming damp, as well as the growth of mould.
authors.affiliation: Institut für Allgemeine, Krankenhaus- und Umwelthygiene der Friedrich-Schiller-Universität Jena.
authors.forename: T
authors.initials: T
authors.lastname: Kaufhold
authors.forename: K
authors.initials: K
authors.lastname: Fiedler
authors.forename: G
authors.initials: G
authors.lastname: Jung
authors.forename: M
authors.initials: M
authors.lastname: Lindner
authors.forename: R P
authors.initials: RP
authors.lastname: Gassel
mesh_terms: D000391:Air Microbiology; D004463:Ecology; D005160:Facility Design and Construction; D005658:Fungi / Q000302:isolation & purification*; D005858:Germany; D006798:Housing / Q000592:standards*; D006801:Humans; D006813:Humidity