The predominate reason that building materials biodegrade is because they are affected by water, known as water ingress. This can lead to serious damp related problems for a property which is why it’s fundamental to the preservation and maintenance of all buildings that they remain as watertight as possible.
Any defect permitting access of moisture into the fabric of a building must be remedied or treated to prevent further entry of water, and the area affected by water dried out. In order to identify defects that can lead to water ingress and to identify areas within the building that are at risk of fungal decay, a detailed inspection should be undertaken by a competent specialist who will carry out an external and internal investigation of the property.
- Deterioration of mortar in brickwork joints.
- Faulty or missing damp proof course.
- Bridging over the damp proof course by soil in flower beds, plinths, etc.
- Blocked air-bricks.
- Cracked or broken pipes, both water-pipes and waste pipes.
- Faulty flashing around window frames (throats to sills).
- Continued overflow from cisterns or water tanks.
(Ivy or other climbing plants may hide many of the above faults and roots may undermine foundations causing breaks in damp courses. Roots of nearby trees may cause similar damage to foundations and damp-courses).
- Solid stone or concrete floors with wooden skirting and/or covered with timber where the impervious membrane is punctured or of poor quality or where no membrane is fitted.
- Condensation—this may be caused by: unlagged steam pipes, especially under floors; b) steam condensate, particularly in wet process factories; c) high atmospheric moisture from normal bathroom and kitchen usage. This is especially important in uninsulated and/or poorly ventilated buildings and is often the cause of decay.
- Trapping of flood—water in under-floor space and over concrete.
- Plumbing defects and defective toilets, either from fracture of the pan or, more commonly, defects in the plumbing unions.
- Close-fitting linoleum vinyl or laminate flooring installed over unventilated or imperfectly ventilated wooden floors.
(Adequate sub-floor ventilation is important and careful attention must be given to clearing blocked air vents or air-holes in sleeper walls. Pockets of dead air favour fungal growth and should be eliminated. Steps must be taken to dry out existing dampness and to prevent further entry of water in addition to the eradication of the fungus and repair of damage caused. Where there is any doubt about the causes source or risks associated with water ingress, ask the advice of a reputable company).