Health risks

Damp and some mould or fungi can have serious health implications for some people living in a leaky home.

In addition to the risk caused by damage to the building structure, leaky buildings can pose health threats for some people due to damp and associated fungal growths.

Damp living conditions affect many people and can worsen the symptoms of illnesses such as asthma, bronchitis and other breathing disorders. Damp also encourages the spread of dust mites which can further worsen these disorders. Damp insulation within the wall framing dramatically reduces the insulation value, making rooms harder to heat. The combination of cold damp rooms and the presence of some fungi will worsen respiratory problems for the very young and very old.

In addition to these problems, some fungi which grow within wet wall cavities are toxic. In particular the stachybotrys mould (a type of fungi) produce spores which carry chemical toxins known as mycotoxins. These may cause flu like symptoms. They particularly affect the young, the old and those with weakened immune systems.

Stachybotrys can be present within a damp wall cavity with no obvious signs or ill effects, but once exposed they will produce airborne spores which can be inhaled by those in close proximity.

If stachybotrys is found, you will probably need to leave the home while repairs are made. People working on the removal of affected timber have to wear protective gear.

For more information see the Department of Labour publication Risks to Health from Mould and other Fungi.