Determination of protective efficacy against wood-decaying basidiomycetes

Determination of protective efficacy against wood-decaying basidiomycetes
16.032026
Mots-clés Brushing, Rot fungi, Surface treatment product, Use class 3
Mots-clés Biological tests, Wood preservation
Mots-clés Biology - Construction
Secteur
Wood Construction
Mots-clés NF EN 839
The NF EN 839 standard is a laboratory method used to determine the protective efficacy of a wood preservative, applied as a surface treatment, against wood-decaying basidiomycete fungi. Cet essai permet au fabricant de déterminer la concentration efficace (ou grammage) d'un produit de traitement du bois appliqué par un traitement de surface, vis-à-vis des champignons basidiomycètes lignivores. Cette norme est requise pour les AMM et pour la certification CTB P+. Le rapport d’essai est reconnu et accrédité. - Application par traitement de surface -
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This method can be applied following an accelerated aging test such as NF EN 73 or NF EN 84.

Test tubes are treated with the preservative according to the supplier’s recommended dosage and instructions. The preservative is applied by brushing, soaking, or pipetting.

The treated test specimens are then sterilized and exposed to basidiomycete fungi (cubic rot and/or fibrous rot) in pure culture for 16 weeks.

At the end of the test, the mass loss of the test specimens is evaluated.
The performance of the product under test is evaluated in terms of its ability to prevent degradation by determining the maximum acceptable mass loss, as well as by noting the absence of visible degradation on the surface and in the untreated inner portion of the test specimens.

  • Skills : 
    Biological testing of wood
  • Normative references : 

    NF EN 839

  • COFRAC Accreditation

 

  • Affiliated laboratory : BioForBois