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Normas BSI – AENOR
20/30415596 DC

20/30415596 DC

BS EN 351-1. Durability of wood and wood-based products. Preservative-treated solid wood. Part 1. Classification of preservative penetration and retention

2020-07-02 /Definitive
Equivalencias internacionales:

prEN 351-1


This part of EN 351 establishes a classification of preservative-treated wood in terms of preservative penetration and gives guidance on a classification of retention. These shall be used as a basis for specifying preservative treatments for particular products.

This part of EN 351 provides terminology to be used by the specifier when preparing a preservative treatment specification or product standard. It is not a treatment specification in itself.

This part of EN 351 is applicable to the production of preservative-treated solid wood, including glued laminated timber, suitable for use in those service conditions defined by the use classes in EN 335. It does not apply to any subsequent examination of treated wood in service.

This part of EN 351 is applicable to the protection of wood against attack by wood-destroying and wood-disfiguring fungi, insects and marine organisms.


Protection against wood-disfiguring fungi is an optional property verified by testing in accordance with EN 599-1.

This part of EN 351 does not consider other properties of treated wood, for example odour, compatibility with other materials, such as corrosivity of fasteners. Nor does it consider any properties from the health, safety and environmental point of view.

This part of EN 351 does not apply to wood to be treated with formulations which are applied to timber in service to eliminate or control an existing fungal or insect infestation, or the prevention of attack by sapstain fungi, or insects in green timber.

Annex A (informatives) provides a decision process for defining preservative treatment requirements.

Annex B (informative) gives an example of the marking system.

Wood, Raw materials, Marking, Wood preservatives, Quality control, Classification systems, Depth, Designations, Wood preservation, Durability, Grades (quality), Penetration tests, Surface treatment, Solid (shape)
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