Nielsen, K. F., Nielsen, P. and Holm, G.
2000
Proceedings of Healthy Buildings, Vol 3, 283-288
material, microbial growth, damp buildings, GC-MSD, relative humidity, Mycotoxin
| The growth of Aspergillus versicolor, A. ustus, Chaetomium spp., Cladosporium sphaerospermum, Penicillium chrysogenum, Stachybotrys chartarum, Trichoderma harzianum, and Ulocladium spp. was evaluated on 27 different building materials at 25 ˇăC and 70, 80 and 90 % relative humidity (RH) over a 7-month period.
Growth was evaluated by photographing the materials monthly, and after 7 months moulds growing on the materials were identified; biomass estimated by the MycoMeter test ? and by GC-MS/MS analysis of ergosterol; and mycotoxins determined by HPLC-DAD-FLD. Moulds grew more slowly than expected and no growth was visible on any material at 70 % RH, but at 80 % RH visible growth was seen on rough pinewood and wallpapered materials. At 90 % RH visible growth by Aspergillus and/or Penicillium on 25-75 % of the surface of all wallpapered materials, MDF, all plywood plates and pine wood. No growth was visible on pure or painted gypsum boards or concrete materials.
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