Introduction
Damp walls are not only a problem for the building structure or appearance. They also have a direct impact on the health and comfort of residents. Moisture creates ideal conditions for mould, dust mites, and bacteria, which can worsen indoor air quality and trigger health issues.
Mould growth
Mould is a fungus that thrives in damp, poorly ventilated spaces.
- Appears as black, green, or grey spots on walls and ceilings.
- Releases spores that spread through the air.
- Often found in corners, behind furniture, or in bathrooms.
Possible effects on health:
- Respiratory irritation (cough, sore throat).
- Worsening of asthma symptoms.
- Increased risk of allergic reactions.
Dust mites and allergies
High humidity promotes the growth of dust mites, which are microscopic organisms living in fabrics, carpets, and mattresses.
- Populations increase when relative humidity exceeds 60%.
- Their waste particles are a common cause of allergic reactions.
Symptoms linked to dust mites:
- Sneezing, nasal congestion.
- Itchy eyes and skin irritation.
- Stronger allergic reactions in sensitive individuals.
Poor indoor air quality
Damp conditions affect air quality in several ways:
- Higher concentration of spores and bacteria.
- Musty odours that linger despite ventilation.
- Air feels heavier and less comfortable.
This environment can reduce overall wellbeing and cause fatigue over time.
Vulnerable groups
- Children: more sensitive respiratory systems.
- Elderly people: greater susceptibility to infections.
- People with asthma or allergies: symptoms may worsen in damp homes.
How to reduce health risks
- Ventilate rooms daily.
- Avoid drying laundry indoors without airflow.
- Keep indoor humidity between 40% and 60%.
- Identify whether dampness comes from condensation, leaks, or rising damp, and explore suitable solutions.
Conclusion
Damp walls are closely linked to health issues such as mould growth, dust mites, and poor indoor air quality. These conditions can irritate the respiratory system, worsen allergies, and reduce comfort, especially for vulnerable groups like children and the elderly. Addressing the presence of damp is not only about preserving buildings but also about protecting everyday wellbeing.
