Dampness at home [e.g. leaky gutters into rooftops] increases the risk of moulds in the environment. This may lead to a number of respiratory illnesses such as chronic blocked nose, sinus congestion, allergies, bronchitis, asthma, wheeze, night time cough and/or shortness of breath.
Ahlroth Pind C, Gunnbjörnsdottír M, Bjerg A, et al. Patient-reported signs of dampness at home may be a risk factor for chronic rhinosinusitis: A cross-sectional study. Clin Exp Allergy. 2017;00:1-7. https://doi.org/10.1111/cea.12976 http://onlinelibrary.wiley.com/doi/10.1111/cea.12976/full