mould

Discusses sick building syndrome in office buildings. Poor ventilation is frequently blamed, although in 60% of cases, no specific cause can be identified, because of symptoms which are non-specific, and the vast variety of substances present in the air. Similarly, factors contributing to disease are not restricted to pollutant levels only. Procedure for examining causes of sick building syndrome are suggested. Describes checking of different kinds of ventilation system, and the importance of outside air intake. Describes problems of both local and central ventilation systems.

One of a series of articles focussing on problem areas in buildings. 1) Examines condensation risks in buildings. Treats condensation processes, water vapour input and movement, conditions for surface and interstitial condensation in walls and roofs. 2) Treats condensation avoidance in general, humidity control, controlling vapour flow, adding insulation, heating, mould. Illustrates numerous examples diagrammatically from various building types.

Dampness on the inside surfaces of dwellings is a frequent source of complaint. It may be due to rising damp, rain penetration or a plumbing defect; or it may be due to condensation. Condensation and mould growth are widespread problems in all housing sectors but especially so in tenanted accommodation. In many cases it may be difficult to identify the underlying cause; this can often be complicated by social issues. Mild cases will often yield to simple changes in the heating and ventilation regime in the dwelling or to cosmetic treatments of redecoration, perhaps with fungicidal paint.