Fungal growth and survival in building materials under fluctuating moisture and temperature conditions

Anna-Liisa Pasanen (Corresponding Author), Jukka-Pekka Kasanen, Sirpa Rautiala, Jussi Ikäheimo, Jouko Rantamäki, Hannu Kääriäinen, Pentti Kalliokoski

    Research output: Contribution to journalArticleScientificpeer-review

    89 Citations (Scopus)

    Abstract

    Growth and viability of fungi on three building materials under moistening and drying conditions were investigated in the laboratory. The materials were taken from buildings under repair and no additional inoculation of fungi was used. The materials underwent four treatments (4–8 weeks of each): capillary absorption of water, drying in air at a relative humidity (RH) of 30%, condensation and finally drying at 50% RH. Moisture content (MC), equilibrium relative humidity (ERH), and concentrations of culturable fungi, actinomycetes and total spores were determined in the materials at 1- or 2-week intervals. The results showed that when water was absorbed by capillary action to the materials, fungal growth started fast and was abundant in the wood-based materials with MC above 20%. Such a limit value could not be defined for fungal contamination in the gypsum board because of complex behaviour of moisture between the gypsum bulk and paper covering. The condensation under the varying RH and temperature conditions caused only restrained fungal growth in the materials. The fast drying (RH 30%) seemed to decrease the viability of fungi but along with the experiment fungal flora was modified to tolerate fluctuating conditions and the drying at RH 50% had only a slight effect on the viability of fungi.
    Original languageEnglish
    Pages (from-to)117 - 127
    Number of pages11
    JournalInternational Biodeterioration and Biodegradation
    Volume46
    Issue number2
    DOIs
    Publication statusPublished - 2000
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Humidity
    relative humidity
    Fungi
    Atmospheric humidity
    Moisture
    moisture
    Drying
    Temperature
    fungus
    Growth
    Calcium Sulfate
    viability
    temperature
    Gypsum
    gypsum
    condensation
    Condensation
    moisture content
    Capillary Action
    Water

    Keywords

    • biocontamination
    • drying
    • gypsum board
    • moistening
    • fungi
    • mould fungi
    • moulds
    • particle board
    • viability
    • wood
    • building materials

    Cite this

    Pasanen, Anna-Liisa ; Kasanen, Jukka-Pekka ; Rautiala, Sirpa ; Ikäheimo, Jussi ; Rantamäki, Jouko ; Kääriäinen, Hannu ; Kalliokoski, Pentti. / Fungal growth and survival in building materials under fluctuating moisture and temperature conditions. In: International Biodeterioration and Biodegradation. 2000 ; Vol. 46, No. 2. pp. 117 - 127.
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    title = "Fungal growth and survival in building materials under fluctuating moisture and temperature conditions",
    abstract = "Growth and viability of fungi on three building materials under moistening and drying conditions were investigated in the laboratory. The materials were taken from buildings under repair and no additional inoculation of fungi was used. The materials underwent four treatments (4–8 weeks of each): capillary absorption of water, drying in air at a relative humidity (RH) of 30{\%}, condensation and finally drying at 50{\%} RH. Moisture content (MC), equilibrium relative humidity (ERH), and concentrations of culturable fungi, actinomycetes and total spores were determined in the materials at 1- or 2-week intervals. The results showed that when water was absorbed by capillary action to the materials, fungal growth started fast and was abundant in the wood-based materials with MC above 20{\%}. Such a limit value could not be defined for fungal contamination in the gypsum board because of complex behaviour of moisture between the gypsum bulk and paper covering. The condensation under the varying RH and temperature conditions caused only restrained fungal growth in the materials. The fast drying (RH 30{\%}) seemed to decrease the viability of fungi but along with the experiment fungal flora was modified to tolerate fluctuating conditions and the drying at RH 50{\%} had only a slight effect on the viability of fungi.",
    keywords = "biocontamination, drying, gypsum board, moistening, fungi, mould fungi, moulds, particle board, viability, wood, building materials",
    author = "Anna-Liisa Pasanen and Jukka-Pekka Kasanen and Sirpa Rautiala and Jussi Ik{\"a}heimo and Jouko Rantam{\"a}ki and Hannu K{\"a}{\"a}ri{\"a}inen and Pentti Kalliokoski",
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    Fungal growth and survival in building materials under fluctuating moisture and temperature conditions. / Pasanen, Anna-Liisa (Corresponding Author); Kasanen, Jukka-Pekka; Rautiala, Sirpa; Ikäheimo, Jussi; Rantamäki, Jouko; Kääriäinen, Hannu; Kalliokoski, Pentti.

    In: International Biodeterioration and Biodegradation, Vol. 46, No. 2, 2000, p. 117 - 127.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Fungal growth and survival in building materials under fluctuating moisture and temperature conditions

    AU - Pasanen, Anna-Liisa

    AU - Kasanen, Jukka-Pekka

    AU - Rautiala, Sirpa

    AU - Ikäheimo, Jussi

    AU - Rantamäki, Jouko

    AU - Kääriäinen, Hannu

    AU - Kalliokoski, Pentti

    PY - 2000

    Y1 - 2000

    N2 - Growth and viability of fungi on three building materials under moistening and drying conditions were investigated in the laboratory. The materials were taken from buildings under repair and no additional inoculation of fungi was used. The materials underwent four treatments (4–8 weeks of each): capillary absorption of water, drying in air at a relative humidity (RH) of 30%, condensation and finally drying at 50% RH. Moisture content (MC), equilibrium relative humidity (ERH), and concentrations of culturable fungi, actinomycetes and total spores were determined in the materials at 1- or 2-week intervals. The results showed that when water was absorbed by capillary action to the materials, fungal growth started fast and was abundant in the wood-based materials with MC above 20%. Such a limit value could not be defined for fungal contamination in the gypsum board because of complex behaviour of moisture between the gypsum bulk and paper covering. The condensation under the varying RH and temperature conditions caused only restrained fungal growth in the materials. The fast drying (RH 30%) seemed to decrease the viability of fungi but along with the experiment fungal flora was modified to tolerate fluctuating conditions and the drying at RH 50% had only a slight effect on the viability of fungi.

    AB - Growth and viability of fungi on three building materials under moistening and drying conditions were investigated in the laboratory. The materials were taken from buildings under repair and no additional inoculation of fungi was used. The materials underwent four treatments (4–8 weeks of each): capillary absorption of water, drying in air at a relative humidity (RH) of 30%, condensation and finally drying at 50% RH. Moisture content (MC), equilibrium relative humidity (ERH), and concentrations of culturable fungi, actinomycetes and total spores were determined in the materials at 1- or 2-week intervals. The results showed that when water was absorbed by capillary action to the materials, fungal growth started fast and was abundant in the wood-based materials with MC above 20%. Such a limit value could not be defined for fungal contamination in the gypsum board because of complex behaviour of moisture between the gypsum bulk and paper covering. The condensation under the varying RH and temperature conditions caused only restrained fungal growth in the materials. The fast drying (RH 30%) seemed to decrease the viability of fungi but along with the experiment fungal flora was modified to tolerate fluctuating conditions and the drying at RH 50% had only a slight effect on the viability of fungi.

    KW - biocontamination

    KW - drying

    KW - gypsum board

    KW - moistening

    KW - fungi

    KW - mould fungi

    KW - moulds

    KW - particle board

    KW - viability

    KW - wood

    KW - building materials

    U2 - 10.1016/S0964-8305(00)00093-7

    DO - 10.1016/S0964-8305(00)00093-7

    M3 - Article

    VL - 46

    SP - 117

    EP - 127

    JO - International Biodeterioration and Biodegradation

    JF - International Biodeterioration and Biodegradation

    SN - 0964-8305

    IS - 2

    ER -