Housing Quality and Respiratory Health

A home is usually thought of as a place that protects people from environmental hazards. However, housing conditions can themselves affect health. Water leaks, persistent dampness, mold, poor ventilation, pests, secondhand smoke, and indoor air pollution can expose residents to conditions that affect the respiratory system.
This makes housing quality more than a question of comfort. It can also be an environmental health issue.
Mold, Dampness, and Respiratory Health
Moisture is one important housing-related risk because persistent dampness can encourage mold and other biological growth. Mold can develop around leaking roofs, windows, pipes, walls, or areas affected by flooding. The CDC reports that exposure to damp and moldy environments can cause respiratory symptoms such as coughing and wheezing, while people with asthma or mold allergies may experience more severe reactions (CDC, 2024).
Research has also examined the relationship between residential mold and respiratory symptoms. A 2023 systematic review and meta-analysis examined 30 studies involving children in high-income countries and found associations between residential dampness or mold and respiratory outcomes. However, many of the underlying studies were cross-sectional or considered to be of poor or fair quality, meaning the findings do not necessarily establish that mold directly caused illness (Groot et al., 2023).
Asthma provides another example of how housing and respiratory health can interact. The CDC identifies mold, dust mites, secondhand smoke, and indoor air pollutants as potential asthma triggers (CDC, 2024). A 2024 systematic review also found moderate-certainty evidence that exposure to dampness or mold increased the risk of new-onset wheeze, although evidence for other respiratory outcomes varied (Burbank et al., 2024).
Housing and Health Equity
Housing-related respiratory risks are not always within a resident's control. A person may be unable to prevent exposure if the underlying problem is a leaking roof, structural dampness, water damage, or inadequate ventilation.
This creates an important connection between housing and health equity. People with greater financial resources may have more options to repair damage, improve ventilation, relocate, or choose housing with fewer environmental problems. Renters may have even less control over structural conditions.
Housing conditions therefore represent an intersection between environmental exposures and broader social conditions.
Can Improving Housing Improve Health?
Researchers have also examined whether fixing housing problems can improve respiratory outcomes. A Cochrane review of 12 studies involving 8,028 participants found moderate-quality evidence that repairing damp or mold-damaged buildings reduced some asthma-related symptoms and respiratory infections among adults, although evidence among children was less consistent (Jauhiainen et al., 2015).
This highlights an important public health principle: identifying an environmental risk is only part of the solution. Effective interventions must also reduce exposure and improve health.
The CDC recommends addressing leaks, promptly drying water-damaged materials, maintaining appropriate indoor humidity, and preventing conditions that allow mold to grow (CDC, 2024). However, residents cannot always address structural problems themselves. Landlords, building managers, and housing agencies may also play important roles.
A Public Health Issue Inside the Home
Housing quality demonstrates how environmental conditions can become health exposures. The air people breathe does not stop at the door of a clinic. It follows them into the places where they sleep, study, work, and spend time with family.
For public health, this means respiratory health cannot always be addressed through medical care alone. Understanding and improving the environments where people live can also be part of preventing respiratory problems and advancing health equity.
References
Burbank, A. J., et al. (2024). The impact of indoor pollution on asthma-related outcomes: A systematic review for the EAACI guidelines on environmental science for allergic diseases and asthma. Allergy, 79(6).
Centers for Disease Control and Prevention. (2024). Mold.
Groot, J., et al. (2023). Exposure to residential mold and dampness and the associations with respiratory tract infections and symptoms thereof in children in high income countries. Paediatric Respiratory Reviews, 48, 47–64.
Jauhiainen, M., et al. (2015). Remediating buildings damaged by dampness and mould for preventing or reducing respiratory tract symptoms, infections and asthma. Cochrane Database of Systematic Reviews, (2), CD007897.
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