LLZ - Les, lesni izdelki in zaščita lesa

This document specifies a method for determining the leaching of active ingredients or other compounds from preservative treated wood by a semi-field method for Use Class 3 (outdoor above ground). The preservative treated wood can be tested with or without subsequently surface coating or other water-repellent treatment. The method is applicable to the testing of commercial or experimental preservatives or paint systems applied to timber by methods appropriate to commercial practice.

This document specifies a method for measuring the thickness, length and width of test pieces of wood-based panels.

This document provides information on the characteristic values for use in designing structures incorporating wood-based panels. The characteristic values given are as defined in EN 1995 1 1.
This document includes the characteristic values of both the mechanical properties and density for the panels set out below:
—   OSB/2, OSB/3 and OSB/4, complying with EN 300;
—   Particleboard, P4, P5 P6, P7 complying with EN 312;
—   Hardboard, HB.HLA2 complying with EN 622 2;
—   Medium board, MBH.LA2 complying with EN 622 3;
—   MDF.LA and MDF.HLS complying with EN 622 5;
—   MDF.RWH complying with EN 622 5.

This document provides information on the characteristic values for use in designing structures incorporating wood-based panels. The characteristic values given are as defined in EN 1995 1 1.
When utilizing the classification system for derivation of plywood characteristic values, this document can only be applied with reference to EN 636.
This document includes the characteristic values of the mechanical properties for plywood complying with EN 636 in bending, tension, compression, panel shear and planar shear. EN 636 classifies bending properties into two sets of classes, one for stiffness and another for strength. Stiffness and strength in tension and compression are related to the same properties in bending.
For shear properties, fixed values determined by correlation to density are provided.
Where optimized values are needed, the characteristic values are determined directly by testing in accordance with EN 789 and EN 1058 or by combination of testing according to the latter two standards and calculation according to EN 14272.
This document applies to panels complying with the three following conditions:
—   5 layers or more and 6 mm overall thickness and more;
—   the ratio of the cumulative thickness of veneers in alternate directions does not exceed 2.5;
—   wood species with a mean density greater than 350 kg/m3 and not exceeding 750 kg/m3.

This document specifies a laboratory method for obtaining water samples from preservative treated wood exposed out of ground contact (wood held in the storage yard after treatment and which has been in conditions designed to simulate outdoor, out of ground contact situations), at increasing time intervals after exposure.

This document specifies the determination of free melamine in coated and uncoated wood-based-panels.
NOTE 1   It is also applicable to other wood-based products, to other solid products e.g. impregnates or decorative paper and to liquid materials.
The determination of melamine is performed by extraction using dimethyl sulfoxide (DMSO) and subsequent high-performance liquid chromatography (HPLC) analysis and ultraviolet (UV) detection.
NOTE 2   For determination of melamine in foodstuff, EN 16858 is applicable. For determination of melamine in animal feeding stuffs, EN 17212 is applicable. For determination of melamine in textiles, EN ISO 1833-26 is applicable.

This document specifies a procedure for a chamber test with different options of chamber sizes to measure the formaldehyde concentrations in air from wood products under defined test conditions of temperature, relative humidity, loading and air exchange rate.
Results obtained from this small-scale chamber test method can be used for quality control (factory production control – ‘FPC’) based on correlation established by reference chamber test methods according to ISO, EN or ASTM standards. The establishment of a correlation is described in Annex D.

This document specifies a method for the determination of the preventive action of a wood preservative against the Reticulitermes species of European termites when the preservative is applied as a surface treatment to wood.
NOTE 1   This method can be applied not only to different species of Reticulitermes, but also to other species of the family Rhinotermitidae, where necessary adapting the temperature and humidity conditions and the assessment of attack to the specific behaviour of the species concerned.
This method is applicable to:
—   water-insoluble chemicals which are being studied as active ingredients;
—   organic formulations, as supplied or as prepared in the laboratory by dilution of concentrates;
—   organic water-dispersible formulations as supplied or as prepared in the laboratory by dilution of concentrates; and
—   water-soluble materials, for example salts.
NOTE 2   This method can be used in conjunction with an ageing procedure, for example EN 73 or EN 84.

On the basis of test results from wood-based panel products for structural purposes, this document specifies a method for the determination of:
-   characteristic 5-percentile values of mechanical properties under the assumption of a log-normal distribution of the test data according to EN 14358; and
-   characteristic mean values (50-percentile values) of physical properties under the assumption of a normal distribution of the test data according to EN 14358.
Test data can be determined from tests using the test methods outlined in the test standard EN 789 or other relevant test standard, performance standard or product standard normatively referring to EN 1058.
NOTE   See e.g. EN 1195 and EN 12871.
The statistical evaluation follows the principles of EN 1990:2023 , Annex D of EN 1995-1-1:2004  and of EN 14358:2016.

This document specifies the characteristics of solid parquet elements with grooves and/or tongues for internal use as flooring. This document is applicable to elements of parquet panels.
This document covers elements with or without surface treatment.

This document specifies a laboratory method for obtaining water samples from treated wood which has been in conditions designed to simulate continuous contact with the ground or with water (use Class 4 or 5), at time intervals after exposure.

This document specifies the requirements for softboards as defined in EN 316, with a density from 230 kg/ m3 to 400 kg/ m3.
The values listed in this document relate to product properties but they are not characteristic values to be used in design calculations.
NOTE   Panels which are intended for use exclusively as thermal insulating products are covered by EN 13171.

This document specifies an evaporative ageing procedure, applicable to test specimens of wood and wood-based products which are subsequently subjected to biological tests.
NOTE   The method can also be used for pre-conditioning of untreated wood, modified wood and wood-based panel products, whether they received preservative treatment or not.

This part of the EN 20 series specifies a method for the determination of the protective effectiveness or the toxic values of a wood preservative against infection by Lyctus brunneus (Stephens) in wood which has been treated previously by full impregantion.
This method is applicable to:
- water-insoluble chemicals which are being studied as active insecticides; or
- organic formulsation, as supplied or as prepared in the laboratory by dilution of concentrates.
This method is applicable to water-based preservatives.
NOTE This method can be used in conjuction with ageing procedures, which do not remove the added nutrient.

This document specifies a method for the determination of the curative action of a wood preservative against infestation by Anobium punctatum (De Geer) when the product is applied as a surface treatment to wood.
This method is applicable to any surface-applied treatment that is intended to prevent emergence of adult beetles but not intended to kill larvae in infested timber.
NOTE 1 This method can be used in conjunction with an ageing procedure, for example EN 73.
NOTE 2 Products intended to kill larvae can be tested by the method described in EN 48.

This part of the EN 20 series specifies a method for the determination of the protective effectiveness or the toxic values of a wood preservative against infection by Lyctus brunneus (Stephens) when the product is applied as a surface treatment to wood.
This method is applicable to:
- water-insoluble chemicals which are being studied as active insecticides; or
- organic formulsation, as supplied or as prepared in the laboratory by dilution of concentrates; or
- organic water-dispersible formulations as supplied or as prepared in the laboratory by dilution of concentrates; or
- water-soluble materials, for example salts.
NOTE This method can be used in conjuction with ageing procedures, which do not remove the added nutrient.

This document specifies a method for the determination of the toxic values of a wood preservative against the Reticulitermes species of European termites.
This method is applicable to:
- water-insoluble chemicals which are being studied as active insecticides;
- organic water-dispersible formulations as supplied or as prepared in the laboratory by dilution of concentrates; and
- water-soluble materials, for example salts.
NOTE This method can be used in conjunction with an ageing procedure, for example EN 73 or EN 84.

This document specifies a procedure for determination of accelerated formaldehyde release from uncoated and coated wood-based panels using the gas analysis method. The procedure is also suitable for the testing of other materials (e.g. edge bands, floor coverings, foams, foils, laminated wood products, veneered wood products, coated wood products).

This document specifies the characteristics, requirements and test methods of multi-layer parquet elements for internal use as flooring.

This part of the EN 351 series gives guidance for the general procedures to be used in obtaining samples of preservative-treated wood for the determination of penetration and retention of wood preservative. It also gives guidance on the measurement of penetration and retention of a wood preservative in the treated wood.
This part of the EN 351 series is applicable to the production of preservative-treated solid wood, including glued laminated timber, suitable for use in those service conditions defined within the use classes in EN 335.
NOTE   Glued laminated timber is not suitable for use in fresh or sea water.
This part of the EN 351 series is not applicable to preservative-treated wood in service. However, the sampling guidance provided within this part of the EN 351 series can be applied for the subsequent examination of treated wood in service.
Annex A (informative) provides a selection of number of sample units.
Annex B (informative) provides examples of retention measurements.

This part of the EN 351 series establishes a classification of preservative-treated wood in terms of preservative penetration and gives guidance on a classification of retention. These can be used as a basis for specifying preservative treatments for particular products.
This part of the EN 351 series defines 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 the EN 351 series is applicable to the production of preservative-treated solid wood, including glued laminated timber, suitable for use in those service conditions defined within the use classes in EN 335. It does not apply to any subsequent examination of treated wood in service.
NOTE 1   Glued laminated timber is not suitable for use in fresh or sea water.
This part of the EN 351 series is applicable to the protection of wood against attack by wood-destroying and wood-disfiguring fungi, insects and marine organisms.
NOTE 2   Protection against wood-disfiguring fungi is an optional property verified by testing in accordance with EN 599-1.
This part of the EN 351 series 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 the EN 351 series 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 (informative) provides a decision process for specifying preservative treatment requirements.
Annex B (informative) gives an example of the marking system.

This document describes a method for assessing the durability of wood-based panels or analogue wood products to attack by wood-destroying basidiomycete fungi growing in pure culture.
The test method described in this document is intended to complement EN 113-2 with focus on specific aspects of wood-based panels or analogue wood products. This document is not intended to determine the effectiveness of wood preservatives used to prevent decay, which is covered by EN 113-1.
NOTE   This method can be used in conjunction with an appropriate ageing procedure, for example EN 73 or EN 84.
The method is applicable to uncoated, rigid wood-based panel products. It is applicable to the determination of the decay resistance of wood-based panel products:
-   made from naturally durable materials;
-   made from materials treated with preservatives prior to manufacture;
-   treated with a preservative which is introduced during manufacture, for example as an additive to the adhesive;
-   specific treatments to increase durability of wood-based panels, e.g. wood modification.
Annex A (informative) contains a guidance on sampling.
Annex B (normative) contains some methods of sterilization.
Annex C (informative) contains information on the culture vessels.
Annex D (informative) contains an example of a test report.
Annex E (informative) contains information on the test fungi.
Annex F (informative) contains the assessment of the results.
Annex G (informative) contains extra info on moisture dynamics, coatings, composites and impact of dimensions.

This document specifies a test method to determine the resistance of the surface of an element of wood flooring, panelling and cladding, to a predetermined list of chemical agents they may be exposed to during their service life.

This document gives guidance on the selection of wood and wood-based products for use in situations where they can be subject to degradation by fungi, wood destroying insects or marine borers. This guidance includes information on factors that can influence the service life of a wood or wood-based product when considering biological degradation. In many end uses, design, workmanship and maintenance will also influence the service life of the wood or wood-based product.
This document is a step toward the evaluation of the service life of a wood product.
This document does not consider:
1)   the durability characteristics of the glue used in wood-based products;
2)   the aesthetic function of wood products (discoloration, surface weathering, mould).

This document specifies a test method for wood preservatives that are intended for use in wood to be exposed to the weather out of contact with the ground without the additional protection of a surface coating.
The method is applicable to the testing of commercial or experimental preservatives applied by techniques appropriate to commercial practice. The method is applicable to chemical products used individually or in combination to prevent the development of decay and/or - optional - the development of disfiguring organisms in wood and, where suitable, in wood-based materials.
NOTE 1 The method can also be used to test other treated wood species and naturally durable timbers. It can be adapted for testing the field performance of other wood-based systems and treatments designed to enhance durability, for example treated or untreated wood based composites, timber treated with non-biocidal systems, chemically modified or heat treated timber. Guidance on samples and sampling of naturally durable wood and modified wood is found in EN 350.
NOTE 2 Although the test is used to assess decay, it is possible to use the method to additionally assess stain or each separately when relevant.

This document specifies a laboratory method for the determination of the treatability of wood in order to determine the likely reaction of different wood species to impregnation with wood preservatives. It is also applicable to investigate variation between samples of the same species but of different origin.

This document specifies requirements for solid wood panels as specified in EN 12775 with a maximum thickness of 80 mm for use in dry, humid and exterior conditions as specified in service classes 1, 2 and 3 of EN 1995-1-1.
Additional information on supplementary properties for certain applications is given in Annex A.

This document specifies a laboratory method for the determination of the treatability of wood in order to determine the likely reaction of different wood species to impregnation with wood preservatives. It is also applicable to investigate variation between samples of the same species but of different origin.

This document provides information on the characteristic values for use in designing structures incorporating wood-based panels. The characteristic values given are as defined in EN 1995-1-1.
This document includes the characteristic values of the mechanical properties and of the raw density for solid-wood panels complying with EN 13353:2022 technical classes SWP/1 S, SWP/2 S, SWP/3 S.

This document provides guidance on how to apply curative acting wood preservatives by surface application, by filling pre-drilled holes, and by pressure impregnation through pre-drilled holes. It lists methods in a standardized form followed by additional detailed interpretive information.
This document also includes necessary preparations of structural timber prior to this kind of treatment. It gives guidance on how to calculate necessary retentions for filling pre-drilled holes or for pressure impregnation from test results obtained from surface applications (e.g. EN 1390).

This document is intended to facilitate the interpretation and use of the European Standards where the testing and specification of wood preservative products are described. It aims to assist users (manufacturers, specifiers, authorities, etc.) to correlate the choice of selected test methods, wood substrates and biological agents with the efficacy requirements of wood preservatives based on their claimed target organisms and end use. This document is a source of supplementary information to the relevant standards and cannot be used as a standalone document.

This document specifies test methods for the determination of characteristics of melamine faced boards (MFB) in accordance with EN 14322.

This document specifies the surface requirements and dimensional tolerances for decorative melamine faced boards for interior use which are common for particleboards, extruded particleboards fibreboards and sandwich boards for furniture.
This document is not applicable to boards laminated with so called priming foils or finish foils and laminates according to EN 438-1 and EN 438-2.
This document is not applicable to laminate floor coverings.
Melamine faced wood-based boards in accordance with this document can be referred to as MFB.

This document specifies methods of measuring the geometrical characteristics of wood flooring and wood panelling and cladding elements.
This document does not specify sampling, which is intended to be found in the product standards or test methods and it does not apply to elements which are installed.

This document specifies a test method to determine the top layer delamination of multilayer parquet elements according to EN 13489 with different structures, dimensions and adhesives for internal use as flooring, at the time of the first delivery of the product.
The document specifies a test method with three aging-treatments (AT1, AT2 and AT3) of the test specimens.
The test method described in this document allows to determine a top layer bonding quality, also for parquet used on floor heating, and for the identification of bonding failure.
NOTE 1 For bottom layer of three layers elements the test method is applicable even if the experience is limited.
AT1 is a suitable treatment for the prognosis of multilayer parquets under dry indoor conditions and can be applied for all type of glues of parquets. It can be used for main underfloor heating systems.
AT2 is a suitable treatment for the assessment of multilayer parquets with PVAc-glues for top layer bonding.
AT3 is a suitable treatment for the assessment of multilayer parquets with different type of glues other than PVA-c for top layer bonding.
This document does not apply to the bonding quality of plywood if it is in use in the multilayer parquet construction.
NOTE 2 This document does not allow to estimate the compatibility of use in wet conditions.

This document specifies a method of test for determining the natural durability of a timber against wood-destroying basidiomycetes cultured on a malt extract agar medium. The method is applicable to all timber species.
Furthermore this method can be used to test modified wood. The test method described in this document can be applied to specific wood species, commercial supplies of sawn timber, wood-based materials, wood treated with preservatives and modified wood, both thermally and chemically modified wood.
However, this document is not intended to determine the effectiveness of wood preservatives used to prevent decay.
NOTE 1 Determining the efficacy of wood preservatives used to prevent decay is the scope of EN 113-1. However, in addition to this and with some amendments, it might also be possible in some cases to test treated wood using the method described here.
NOTE 2 This method can be used in conjunction with an ageing procedure, for example EN 73 or EN 84.
Annex A (informative) contains a guidance on sampling.
Annex B (normative) contains some methods of sterilization.
Annex C (informative) contains information on the culture vessels.
Annex D (informative) contains an example of a test report.
Annex E (informative) contains information on the test fungi.
Annex F (informative) contains the assessment of the results.

This document specifies a method for determining the efficacy of wood preservatives applied to wood by penetration treatment against wood destroying basidiomycetes cultured on a malt extract agar medium.
The method is applicable to formulated products or to their active ingredients.
NOTE   This method can be used in conjunction with an ageing procedure, for example EN 73 or EN 84.
Annex A (informative) contains an example of a test report.
Annex B (normative) contains some methods of sterilization.
Annex C (informative) contains information on the test vessels.
Annex D (informative) contains information on test fungi.
Annex E (informative) contains a recommended but non-comprehensive list of optional fungi.

This document specifies a method for leaching, applicable to test specimens of wood or wood-based products which are subsequently subjected to biological tests.
This document is applicable to:
a)   the pre-conditioning of test specimens prior to their being subjected to a biological test; or
b)   assessment of loss of effectiveness by comparing the performance in a biological test of treated test specimens subjected to this procedure with others that have not undergone any leaching procedure.
NOTE   The method can also be used for pre-conditioning of untreated wood, modified wood and wood-based panel products, whether they received preservative treatment or not.

This document specifies a method for determining the performance of a preservative, applied to the upper surface of the mortar test specimens, in preventing the growth of dry rot through the treated mortar when exposed to the test fungus.
This method is only applicable to masonry fungicides applied as a true solution of the preservative in water or dilute oil in water emulsion. It is not applicable to rods, pastes and other similar preservative types. This method is applicable to preservatives applied to masonry by brushing, spraying and/or injection techniques or mixed into rendering and plastering mortar for masonry.

This document specifies the minimum performance requirements in biological tests for products for curative uses against specific wood destroying organisms. It specifies the biological tests required together with the efficacy criteria to be achieved in each test.
Chemicals against insects can act according to their specific properties within a short time (fast acting) or only after a long period (slow acting or with a deferred effect). Different tests and efficacy requirements are needed for these various types of curative wood preservatives.
This document is applicable to all wood preservative products supplied for application in liquid form for curative uses against attack by wood boring beetles. This document is also applicable for products applied to prevent the growth of the dry rot fungus through masonry.
This document is also applicable to products for curative uses supplied for application as pastes, solids or in capsule form but only where appropriate biological methods of test exist as published European Standards.
NOTE   This standard is used as a reference document for the evaluation of efficacy of biocidal products PT8 (wood preservatives) in the framework of the European Regulation on Biocidal Products (EU) No 528/2012 (BPR).
This document is not applicable to products used as fumigants.
This document is also not applicable for determining whether specific curative products, used alone or in combination, are effective in conferring long-term protection against attack by wood destroying organisms. Preventive effectiveness can be determined using EN 599-1 but only for products that can be tested using the methods and interpretative procedures defined in EN 599-1.
Annex A (informative) contains a guidance on re-testing after making variations in product formulation.
Annex B (informative) contains some test recommendations for specific curative products against other insect species than Hylotrupes bajulus and Anobium punctatum.

This document specifies a method for the determination of the eradicant action of a surface application of a fast and a slow acting wood preservative product or a deferred acting wood preservative product on solid wood infested with larvae of Hylotrupes bajulus (Linnaeus).
This method is applicable to:
-   organic formulations, as supplied or as prepared in the laboratory by dilution of concentrates; or
-   organic water-dispersible formulations, as supplied or as prepared in the laboratory by dilution of concentrates; or
-   water-soluble products, for example, salts.
NOTE   An ageing procedure cannot be combined with this method.

This document specifies the characteristics of individual hardwood boards and pre-assembled hardwood boards with grooves and/or tongues for internal use as flooring. This document covers hardwood boards with or without surface coating.
This document does not cover solid parquet elements. (See Annex C).

This European Standard defines and specifies the relevant characteristics and the appropriate test methods to determine these characteristics for solid wood products to be used as panelling and cladding (including siding) for:
-   wall and ceiling panelling for internal use,
-   wall and ceiling cladding for external uses.
It provides for the assessment and verification of constancy of performance and the requirements for marking these products.
This European Standard does not cover panels intended for use as stiffening elements.
This European Standard does not cover suspended ceiling in wood panelling and cladding.
This European Standard does not cover the processes for treatment, surface coating or modification.
This European standard does not cover products which are produced from laminated layer section.
This European Standard covers treated, untreated and surface coated products, including those made of thermally or chemically modified wood, as well as finger jointed and edge glued products.
NOTE   Prescriptions for surface coating and treatment can be found in documents valid in the place of use.
This European Standard covers products in compliance with EN 14519, EN 15146 and EN 14951, and other solid timber products manufactured for use as panelling and cladding.

This document specifies a method, derived from the test, for determining the resistance to indentation of wood flooring.

This European Standard defines general terms relating to sawn timber and round timber used in European Standards.

This European Standard defines and specifies the relevant characteristics, requirements and appropriate test methods for determination of the suitability of floorings made with at least a top layer of lignified material other than wood for use as internal flooring including in fully enclosed public transport premises.
The European Standards for specific flooring products made of lignified material other than wood to which this European Standard applies, and which provide product definitions, requirements for dimensional tolerances and other technical specifications, are the following:
- Bamboo flooring products (EN YYYYY),
- Palm flooring products (EN ZZZZZ).
This European Standard provides also for the assessment and verification of constancy of performance and the requirements for marking these products.
This European Standard covers flooring products made of lignified material other than wood which may or may not be treated to improve their reaction to fire performance or their durability against biological agents.
This European Standard does not apply to:
- flooring products specifically manufactured for enhanced tactile and recognition,
- wood flooring products covered by EN 14342,
- laminate flooring products covered by EN 14041.

This document details a method for determining the water uptake and the effectiveness of the drying process on solid wood, wood-based materials or coated wood by means of water absorption and water vapour desorption. This document lays down a method to assess the moisture dynamics of wooden products which can be a contributing factor to the susceptibility to wood decay.

This document defines terms and their definitions relating to wood flooring and parquet.

CCMC - addition of superseding note in the European Foreword

This European Standard specifies the methodology for measurement of features - in relation to wood structure, biological agencies and other damage - taken into account in the visual grading:
a)   for appearance - of sawn, processed and round timber;
b)   for serviceability - of sawn and processed timber (identified in EN 1611-1 as the integrity of the timber).
When the standard is applied the methodology of measurement used shall be stated.
It is not applicable to structural timber for which strength grading in accordance with EN 14081-1 is required.
This standard applies to hardwood and softwood sawn timber, both square edged and un-edged, to processed timber and to round timber.
It does not apply to tropical timber.