How quickly must gypsum board and ceiling tile be dried to preclude mold growth after a water accident?
Horner, W. E., Morey, R. and Ligman, D. B. K.
2004
ASHRAE, ndoor Air Quality 2001 Moisture, Microbes, and Heath Effects: Indoor Air Quality and Moisture in Buildings Conference Papers
Horner, W. E., Morey, R. and Ligman, D. B. K., (2004), "How quickly must gypsum board and ceiling tile be dried to preclude mold growth after a water accident?", ASHRAE, ndoor Air Quality 2001 Moisture, Microbes, and Heath Effects: Indoor Air Quality and Moisture in Buildings Conference Papers.
| Abstract: |
| We sought to experimentally establish the time frame in which building materials must be dried to preclude mold growth after a water damage event, such as with firefighting activities, a burst pipe, or flooding. Water damage was simulated by inoculating sample coupons of sterile, unused, saturated ceiling tile and gypsum wallboard with molds frequently found in water-damaged buildings. Coupons were incubated at controlled humidity levels. The coupons were not visually moldy at seven days after inoculation, but even minimal (6X - 25X) magnification showed numerous incipient mold colonies; many were sporulating, including Ulocladium, Stachy-botrys, Chaetomium, Penicillium, and Aspergillus. Although reduced at lower humidity levels, mold colonies developed even at 44% to 45% RH in 48 to 72 hours. Further analysis is needed of mold microcolony development on water-damaged material under service conditions, rather than in static |
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