How can mould and condensation affect your health?

condensation in window

Mould in the home can have a significant effect on our health. Poor ventilation is one of the key causes of mould growth, resulting from moisture buildup in certain areas of the home. Inhaling mould spores can inflame the airways, causing nasal congestion, wheezing, chest tightness, coughing and throat irritation. Chronic health problems such as asthma are linked to indoor dampness. If you’re susceptible to asthma and allergies, you are more likely to be affected by mould in your home.

The World Health Organisation estimates that in cold climates, 15% of dwellings have signs of dampness and 5% have signs of mould problems. In warm climates, the estimates are 20% for dampness and 25% for mould.

Find out more about Bradford's solution to preventing rising moisture from under your house > 

What does condensation and mould mean for Australian homes?

Long perceived to be immune from condensation and dampness problems, Australia is seeing an increase in the occurrence and severity of condensation problems due to changes in building design and increases in energy efficiency targets.

The possible consequences of condensation and the subsequent high humidity environment include;

  • Health risks: Unseen mould growth behind wall linings and external cladding can be a health risk to the occupants, particularly the young or elderly, or those with asthma.
  • Visual deterioration: Deflection or staining of plasterboard linings as a result of moisture trapped behind the linings can cause ugly stains and swelling.
  • Structural decay: Moisture trapped within the structure can result in long term corrosion of metal structures, timber rot, loosening of nails as timber swells, and cladding rot or swelling which can result in costly rectification work.
  • Energy efficiency: A reduction in the building’s energy efficiency can occur due to moisture in the insulation, which can result in loss of thermal performance.

How can Bradford Ventilation help?

No safe levels of indoor dampness and or mould have been defined, so health-based standards or guidelines do not exist. Nonetheless, there are several practicable measures you can take to prevent or minimise indoor mould.

The most proactive of these are adequately ventilating and insulating your home to reduce condensation and air humidity levels, while keeping your home warm in winter and protected from the outside elements. Ensure you install and use appropriate ventilation, particularly in wet areas or areas where water vapour may be emitted, such as bathrooms, laundries and kitchen areas. Wall wrap and roof sarking products can provide a number of benefits to make your home more comfortable to live in and reduce the risk of condensation formation which can lead to mould.

For help combating condensation and mould in your home, take a look at our ventilation solutions pages:

These pages are designed to help you invest in a home that's more affordable to build, great to live in and efficient to run.

Referenced from the article‘Health Check: how does household mould affect your health?’ originally published at The Conversation. Read the original article by Jeroen Douwes.

16 Nov 2015
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