What is Structural Damp?
Structural damp is the result of excessive moisture being present in a building. The ingress of excessive moisture can be caused by various factors.
The problem of ‘Rising damp’ has been known about as far back as Roman times. In the Victorian times this issue was addressed through the Public Health Act of 1875. This required the introduction of a non-permeable layer otherwise known as a damp proof course (DPC) approx. 150mm above ground level. The purpose of a DPC is to prevent the upward migration of ground water and moisture into the superstructure of a building through the foundations by capillary action.
The problem of ‘Penetrating damp’ occurs when the outer protective envelope of a building is breached. This damp can penetrate through defective masonry, roofs or around window and door openings.