A full-scale model, containing numerous moisture sensors, was constructed to simulate the infection of the vulnerable floor-wall junction in a historic building by the dry rot fungus, Serpula lacrymans, and subsequent treatment by a chemical-free method. During the infection of the materials, growth of S. lacrymans became luxuriant throughout. Subsequent opening of the plaster walling of the construction, followed by aeration via ambient humidity then by Tan drying, caused all exposed growth to become shrivelled and inactivated Conversely, growth of S. lacrymans into an enclosed lower chamber, below the level of the flooring, was stimulated by the treatments. This latter growth, which emerged mostly from the stone walling, responded rapidly to direct treatment by ambient humidity followed by fan drying; however the shrivelled mycelium vigorously recrudesced soon after the restoration of suitable environmental conditions. Removal of excess moisture from the system, or isolation of timber from damp masonry, prevented this recrudescence. The salient features of chemical-free treatment via air drying were therefore demonstrated in a controlled and representative manner.

• fungi and molds in buildings and their envelopes : dry rot, Serpula lacrymans

1. Development of model systems for investigations of the dry rot fungus Serpula lacrymans (Schumach. ex Fr.) Gray: Use for analysis of the environmental sensitivity of the organism  

1. An epidemiological study of the relative importance of damp housing in relation to adult health
2. Modeling entry of micron-sized and submicron-sized particles into the indoor environment  

1. Development of model systems for investigations of the dry rot fungus Serpula lacrymans (Schumach. ex Fr.) Gray: Use for analysis of the environmental sensitivity of the organism