Tests on the protective efficacy of wood preservatives not in contact with the ground

The NF EN 330 standard defines an outdoor test method for determining the effectiveness of a wood preservative and a coating (finish) in protecting wood against rot fungi, for use in service class 3. Wood assemblies representing joinery are treated, coated, and then installed on supports above the ground, preventing any contact with it. They are exposed outdoors for 5 years.

Visual inspections to assess the condition of the assemblies are conducted annually.

The test report indicates the effectiveness of the protective system (product + finish) in protecting the assembly in service class 3 against wood-decaying basidiomycete fungi.

The CEN/TS 12037 standard is a standard that describes an outdoor test method for determining the effectiveness of a wood preservative applied without a subsequent coating to protect wood intended for use in service class 3.

The wooden joints are typical of carpentry work (lap joints). They are treated with a preservative and then left outdoors on raised supports for five years.

Visual inspections of the condition of the joints are conducted annually.
The test report indicates the effectiveness of the wood preservative in protecting the joint in service class 3 against wood-decaying basidiomycetes.

• Skills : 
  Biological testing of wood

• Normative references : 
  

  NF EN 330, XP CEN/TS 12037

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