Considering the importance of developing studies that comprehend the favorable environmental conditions to mold formation, this paper presents an analysis of the inner surface of one outside facing wall in an selected space of a historic building in the city of Pelotas, RS. The analyzed surface presents mold occurrence, confirmed with microbiological analyses. In order to understand the environmental conditions that further the formation of mold on this surface, two distinct methods of hygrothermal conditions at the surface were analyzed: the first one considers steady-state heat transfer; and the second one, via computer simulation, considers transient heat transfer. Results, from both methods, confirmed the mold formation possibility, particularly accounting for issues related to moisture next to wall surface as well as inner surface temperature. Analyses were accomplished in view of NBR 15220-2: thermal performance of buildings: part 2 (ABNT, 2005), NBR 15575-1: dwellings up to five floors (ABNT, 2008) and the German standard DIN 4108-3: thermal insulation and energy saving in buildings (2001).
Mold; Historic buildings; Thermal transmittance
