Timber Decay in Buildings: Pathology and Control

The built environment is the product of complex interactions between the external environment, the building materials, the design, the contents, the activities in the building, and the occupants, both human and commensal. To try to manipulate any one of these factors without consideration for the effects on the others can be at worst ineffective, and at best, inefficient and costly. Timber decay organisms cannot be eradicated even by the most Draconian pesticide treatments. However, they can flourish in buildings only if the environmental conditions are suitable. Even with the loss of traditional skills and the complexities introduced into building by new materials and uses, these conditions can easily be avoided with a little thought and scientific understanding. Indeed, new materials and techniques can often be used to advantage if their properties are analyzed as potential environmental controls. This more rational approach to the treatment of timber decay is really good building practice, which independent surveyors and their scientific consultants should promote in the interest of sound building and public health.