Controlled Study of Mold Growth and Cleaning Procedure on Treated and Untreated Wet Gypsum Wallboard in an Indoor Environment

  title={Controlled Study of Mold Growth and Cleaning Procedure on Treated and Untreated Wet Gypsum Wallboard in an Indoor Environment},
  author={Michael Krause and W. Geer and Lonie J. Swenson and Payam M. Fallah and Coreen A. Robbins},
  journal={Journal of Occupational and Environmental Hygiene},
  pages={435 - 441}
  • M. Krause, W. Geer, +2 authors C. Robbins
  • Published 1 August 2006
  • Materials Science, Medicine
  • Journal of Occupational and Environmental Hygiene
The basis for some common gypsum wallboard mold remediation practices was examined. The bottom inch of several gypsum wallboard panels was immersed in bottled drinking water; some panels were coated and others were untreated. The panels were examined and tested for a period of 8 weeks. This study investigated: (a) whether mold growth, detectable visually or with tape lift samples, occurs within 1 week on wet gypsum wallboard; (b) the types, timing, and extent of mold growth on wet gypsum… 
Testing Antimicrobial Paint Efficacy on Gypsum Wallboard Contaminated with Stachybotrys chartarum
Results indicate differences in antimicrobial efficacy for the period of testing, and that proper cleaning and resurfacing of GWB with an antimicrobial paint can be an option in those unique circumstances when removal may not be possible.
Testing antimicrobial cleaner efficacy on gypsum wallboard contaminated with Stachybotrys chartarum
The best antimicrobial cleaner to choose is often dependent on the type of surface to be cleaned of S. chartarum contamination, and solutions to control mold regrowth may contribute to reduced occupant exposure.
Impact of paint and wall-paper on mould growth on plasterboards and aluminum
Abstract Biocide-free and biocide-treated plasterboards as well as aluminum plate as a reference material normally considered as being insensitive to mould growth have been used as substrate to check
Remediation of mould damaged building materials--efficiency of a broad spectrum of treatments.
None of the decontamination methods tested could completely eliminate viable moulds and the results emphasize the importance to work preventively with moisture safety throughout the construction processes and management to prevent mould growth on building materials.
Quantifying discoloration caused by the indoor fungus Penicillium rubens on building material at controlled humidity
Fungal growth in the indoor environment can affect human health by causing allergic reactions and respiratory symptoms. In the search for a solution to prevent or limit fungal growth in the indoor
Moisture parameters and fungal communities associated with gypsum drywall in buildings
A literature review was conducted specifically on moisture-induced fungal growth on gypsum drywall, revealing that there is no consistent measurement approach used to characterize moisture in laboratory and field studies, with relative humidity measurements being most common.
Current and future chemical treatments to fight biodeterioration of outdoor building materials and associated biofilms: Moving away from ecotoxic and towards efficient, sustainable solutions.
This review highlights the complexity of choosing the adequate antifouling compounds when fighting biodeterioration and proposes developing case-to-case innovative strategies to raise this challenge, relying on integrative and multidisciplinary approaches.
Environmental factors influencing fungal growth on gypsum boards and their structural biodeterioration: A university campus case study
The observed biodeteriorative capabilities of indoor fungi upon the ubiquitous gypsum board material as a function of building age and room functionality within a university campus suggest a critical need towards multi-criteria design and optimization of next-generation healthy buildings.
Efficacy of "green" cleaning products with respect to common respiratory viruses and mold growth.
  • E. Light
  • Biology, Medicine
    Journal of environmental health
  • 2009
Out of 27 products approved by Green Seal as hard surface cleaners, 26 do not claim antimicrobial capability, while some contained hydrogen peroxide, a compound with limited spectrum disinfection capabilities, only one was registered with the U.S. Environmental Protection Agency as antimicrobial.
Tape Lift Sampling of Chemical Threat Agents
Commercial‐off‐the‐shelf (COTS) materials were evaluated as surface samplers for the Department of Homeland Security Chemical Forensics Program and duct tape provided highest recoveries across all surfaces.


Sanitation of Wallboard Colonized with Stachybotrys chartarum
It is indicated that control samples of uninstalled wallboard, available from local distributors, can contain a baseline bioburden, including S. chartarum, that will colonize surfaces under high humidity conditions.
Effect of Plasterboard Composition on Stachybotrys chartarum Growth and Biological Activity of Spores
It is shown that the growth of a strain of S. chartarum on plasterboard and the subsequent bioactivity of spores were affected by minor changes to the composition of the core or liners, but it could not be totally prevented without resorting to the use of biocides.
Volatile metabolites produced by three strains of Stachybotrys chartarum cultivated on rice and gypsum board.
It may be possible to use marker-unique MVOCs as a fingerprint to distinguish fungi in indoor environments once enough information becomes available, and these findings indicate that volatiles produced by S. chartarum may represent a relatively small fraction of the total volatile present in problem buildings where Aspergillus spp, Penicillium spp.
Production of mycotoxins on artificially and naturally infested building materials
The quantities of secondary metabolites produced by Penicillia were generally low, and no toxin production was detected from any of the five isolates of Pen.
Ahearn: Sanitation of wallboard colonized with S. Chartarum
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  • 1999
Guidelines on Assessment and Remediation of Fungi in Indoor Environments
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  • 2001
Cleaning and Restoration Certification (IICRC): Standard and Reference Guide for Water Damaage Restoration (IICRC S500)
  • 1999
ASTM): Standard Practice for Determining Resistance of Synthetic Polymeric Materials to Fungi (G 21-96)
  • [Standard] West Conshohocken, Pa: ASTM International,
  • 1996
Standard Practice for Determining Resistance of Synthetic Polymeric Materials to Fungi (G 21-96)
  • ASTM International (ASTM)
  • 1996
ASTM): Standard Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental Chamber (D 3273-94)
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