Indoor air quality and health problems associated with damp floor coverings
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To study the relationship between a high incidence of bronchial asthma among employees working in an office building and an indoor air problem related to the degradation of polyvinyl chloride (PVC) floor coverings in the building. The indoor air measurements and results of renovations are also described.
Employees’ symptoms were surveyed by a questionnaire, and the incidence of asthma was calculated from the medical records for 1997–2000. The quality of indoor air was assessed by microbial sampling and by investigation of the building for possible moisture damage. Indoor air was sampled for volatile organic compounds (VOCs) through Tenax adsorbent tubes. In situ volatile emission measurements from the concrete floor were performed via the field and laboratory emission cell (FLEC) method.
In an office with approximately 150 employees, eight new cases of asthma were found in 4 years. In addition, the workers complained of respiratory, conjunctival and nasal symptoms. Emissions indicating the degradation of plastic floor coverings (e.g. 2-ethyl-1-hexanol, 1-butanol) were found in the indoor air and floor material samples. The plastic floor coverings, adhesives and the levelling layers were carefully removed from 12 rooms. The VOCs had diffused into the underlying concrete slabs. The concrete was warmed to remove the diffused VOCs from these areas. After the repairs the concentrations of the VOCs indicating the degradation of PVC, decreased, as did the prevalence of the employees’ symptoms and several asthma patients’ need for medication.
The workers in the office building complained of several respiratory, conjunctival and dermal symptoms. The incidence of adult-onset asthma was approximately nine-times higher than that among Finns employed in similar work. The most probable single cause of the indoor air problem was the degradation of the plastic floor coverings.
KeywordsIndoor air PVC Chemical impurities Asthma
- Bornehag CG, Blomquist G, Gyntelberg F, Järvholm B, Malmberg P, Nordvall L, Nielsen A, Pershagen G, Sundell J (2001) Dampness in buildings and health. Nordic interdisciplinary review of the scientific evidence on associations between exposure to “dampness” in buildings and health effects (NORDDAMP). Indoor Air 11:72–86CrossRefPubMedGoogle Scholar
- Gustavsson H, Lundgren B (1997) Off-gassing from building materials: a survey of case studies. In: Brune D, Gerhardsson G, Crockford GW, Dáuria D (eds) The workplace, vol 1. Fundamentals of health, safety and welfare. International Labor Office, Geneva, pp 533–555Google Scholar
- Husman T (1996) Health effects of indoor-air microorganisms. Scand J Work Environ Health 22:5–13Google Scholar
- Jaakkola JJ, Verkasalo PK, Jaakkola N (2000) Plastic wall materials in the home and respiratory health in young children. Am J Public Health 90:787–789Google Scholar
- Samson A, Flannigan B, Flannigan ME, Verhoeff AP, Adam OCG, Hoekstra ES (1994) Recommendations, health implications of fungi in indoor environments. Air quality monographs, vol 2. Elsevier, AmsterdamGoogle Scholar
- Seppänen O, Säteri J (eds) (2001) Classification of indoor climate 2000. Finnish Society of Indoor Air Quality and Climate, Espoo, FinlandGoogle Scholar
- Wiglusz R, Igielska B, Sitko E, Nikel G, Jarnuszkiewicz I (1998) Emission of volatile organic compounds (VOCs) from PVC flooring coverings. Bull Inst Marit Trop Med 49:101–107Google Scholar