Crawl spaces as reservoirs for transmission of mold to the livable part of the home environment

Marie Lynn Miranda, Mayra Overstreet Galeano, Brack Hale, Wayne R. Thomann

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Background: Recent studies suggest that exposure to mold in damp buildings is an important environmental risk factor for childhood respiratory illness. One potential source of a damp home, is crawl space construction. A poorly constructed crawl space not only presents the possibility of contributing to a 'damp' home but can also become a reservoir for fungal growth. Objectives: Fungal levels in the livable indoor environment have been characterized in other studies, but little has been done to assess the potential for mold growth in the crawl space. This study examines the potential for mold growth and subsequent transmission from the crawl space into the home environment. Methods: In this study, we assessed mold contamination levels within crawl spaces from 238 study homes in North Carolina. We determined whether air leakage from the heating, ventilation, and air conditioning (HVAC) system and associated ductwork, transmitted viable mold spores from the crawl space into the living spaces within the home. Results: The results indicate that 19% of the homes demonstrated transmission of mold spores from the crawl space into the indoor environment, 45% of the homes displayed no transmission, and 36% of the homes were indeterminate. Conclusions: The results support the hypothesis that the HVAC system can serve as a conduit for the transmission of mold spores from the crawl space to the indoor environment of a home. This transmission likely affects children's health, given the significant amount of time they spend in the home environment. For low-income families, the HVAC system may contribute an additional source of childhood exposure and highlights the importance of the assessment of indoor environmental hazards.

Original languageEnglish (US)
Pages (from-to)205-213
Number of pages9
JournalReviews on Environmental Health
Volume26
Issue number3
DOIs
StatePublished - Sep 1 2011
Externally publishedYes

Fingerprint

Fungi
heat pump
conditioning
air
Air Conditioning
Air conditioning
Ventilation
Spores
Heating
childhood
Leakage (fluid)
Growth
environmental pollution
Hazards
building
Contamination
low income
illness
Health
Air

Keywords

  • Allergy and asthma
  • bioaerosols
  • children's environmental health
  • exposure
  • housing
  • indoor air quality
  • molds and fungi

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health
  • Pollution
  • Health(social science)

Cite this

Crawl spaces as reservoirs for transmission of mold to the livable part of the home environment. / Miranda, Marie Lynn; Overstreet Galeano, Mayra; Hale, Brack; Thomann, Wayne R.

In: Reviews on Environmental Health, Vol. 26, No. 3, 01.09.2011, p. 205-213.

Research output: Contribution to journalArticle

Miranda, Marie Lynn ; Overstreet Galeano, Mayra ; Hale, Brack ; Thomann, Wayne R. / Crawl spaces as reservoirs for transmission of mold to the livable part of the home environment. In: Reviews on Environmental Health. 2011 ; Vol. 26, No. 3. pp. 205-213.
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