Biocide efficacy and consolidant effect on the mycoflora of historical stuccos in indoor environment

•Four fungal species cause deterioration on the stuccoed vault of a heritage building.•Morphological identifications are improved by molecular analyses on fungal isolates.•Species-specific sensitivity is recognizable for most of assayed biocide treatments.•Most of assayed consolidants stimulate the growth of the detected species.•Species-specific assays are necessary to address the use of restoration products.