SIST EN 14519:2026

• Abstract:

  This document specifies characteristics of solid wood panelling and cladding with tongue and groove machined from softwoods (wood of trees of the botanical group gymnosperms).; Products are intended for interior or exterior use.; This document covers treated, untreated and surface treated products, including those made of thermally and chemically modified wood, as well as finger jointed products.; This document does not cover processes for treatment, surface coating or modification.; NOTE Where further regulatory provisions (e.g. durability, reaction to fire, dangerous substances and generally CE-marking according to CPR) are required, harmonized EN 14915 applies.

• Status: Published
• Public Enquiry End Date: 16-Jul-2025
• Publication Date: 17-Aug-2026
• ICS: 79.080 - Semi-manufactures of timber
• Technical Committee: LLZ - Les, lesni izdelki in zaščita lesa
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 30-Jul-2026
• Due Date: 04-Oct-2026
• Completion Date: 18-Aug-2026
• Ref Project: EN 14519:2026 - Solid softwood panelling and cladding - Machined profiles with tongue and groove

• Refers: SIST EN 13307-1:2007 - Timber blanks and semi-finished profiles for non-structural uses - Part 1: Requirements
• Effective Date: 12-Aug-2026
• Refers: SIST EN 1309-3:2018 - Round and sawn timber - Methods of measurements - Part 3: Features and biological degradations
• Effective Date: 12-Aug-2026
• Refers: SIST EN 13647:2021 - Wood flooring and wood panelling and cladding - Determination of geometrical characteristics
• Effective Date: 12-Aug-2026
• Refers: SIST EN 844:2019 - Round and sawn timber - Terminology
• Effective Date: 12-Aug-2026
• Refers: SIST EN 13183-3:2005 - Moisture content of a piece of sawn timber - Part 3: Estimation by capacitance method
• Effective Date: 12-Aug-2026
• Refers: SIST EN 13183-1:2003 - Moisture content of a piece of sawn timber - Part 1: Determination by oven dry method
• Effective Date: 12-Aug-2026
• Refers: SIST EN 13756:2018 - Wood flooring and parquet - Terminology
• Effective Date: 12-Aug-2026
• Refers: SIST EN 13183-2:2003 - Moisture content of a piece of sawn timber - Part 2: Estimation by electrical resistance method
• Effective Date: 12-Aug-2026
• Revises: SIST EN 14519:2006 - Solid softwood panelling and cladding - Machined profiles with tongue and groove
• Effective Date: 19-Jan-2023

SIST EN 14519:2026 is the Slovenian adoption of EN 14519:2026, a CEN European Standard for solid softwood panelling and cladding with machined tongue-and-groove profiles. It specifies product characteristics, grading, moisture content, geometry, machining and marking for elements intended for interior or exterior use, so manufacturers, buyers and inspectors can describe and check the product in the same way.

What does SIST EN 14519:2026 specify?

SIST EN 14519:2026 specifies solid wood panelling and cladding machined from softwoods, meaning wood from trees in the botanical group gymnosperms. It covers treated, untreated and surface treated products, including thermally and chemically modified wood and finger jointed products.

The document does not cover the treatment, coating or modification processes themselves. Where additional regulatory requirements are needed, such as durability, reaction to fire, dangerous substances or CE-marking under CPR, EN 14915 is the related standard to use.

The document is organized into:

• Clause 1 - Scope
• Clause 2 - Normative references
• Clause 3 - Terms and definitions
• Clause 4 - Symbols and abbreviations
• Clause 5 - Requirements
• Clause 6 - Sampling
• Clause 7 - Technical specifications and marking
• Annex A - Normative requirements for classification of a free grade

Annex	What it covers
Annex A	Requirements for classifying a free grade

What are the key requirements of SIST EN 14519:2026?

Grading and product description

• Clause 5.1 ties the softwood species to the expected appearance and intended use, and it allows finger jointing when it is specified and agreed. In practice, the producer and buyer need to agree on species, use and any finger-jointed construction before supply.
• Clause 5.2 says grading applies to the face only unless otherwise specified, and the feature measurements follow EN 1309-3. This matters because the visible face is the main quality surface for installed panelling and cladding.
• Clause 5.2.2 separates grading into two systems: grades A and B for softwoods except maritime pine, and grades 0 (SN), A (PN) and B (NO) for maritime pine. The tables control knots, chipped grain, fissures, pith, colour, fungal attack, insect damage, wane and other features.
• Clause 5.2.3 allows a free grade when the standard grades are not suitable. In that case, the declared features must be agreed by the parties and Annex A gives the minimum feature list to state.

Moisture and geometry

• Clause 5.3 sets the moisture content at production for interior use, exterior use and maritime pine, and limits the share of elements outside the specified range. This helps control movement, fit and later distortion.
• Clause 5.4.1 and 5.4.3 require dimensional measurement according to EN 13647 at the reference moisture content. The practical effect is that width and thickness are assessed at a defined condition, not at any random site moisture.
• Figure 1 and Tables 3 and 4 define the tongue-and-groove profile concept and the permitted thickness and width ranges. Clause 5.4.3.5 also gives length tolerances, with different limits for rough lengths and for target-size or end-matched elements.
• Clause 5.4.3.6 addresses deformation such as bow, cup, spring and twist, and it sets a specific tolerance for cup. This is important because flatness affects installation and appearance.

Machining, sampling and marking

• Clause 5.4.4 requires planed faces unless otherwise specified, limits visible cutter marks, and says the elements shall fit together easily at production. For tongue-and-groove products, the joint must provide a proper connection along the full length.
• Clause 6 recommends CEN/TS 12169 for sampling in case of dispute. That gives a common basis when a lot must be checked independently.
• Clause 7 requires technical specifications and marking to identify the product, profile type, standard number, wood species, grade or free grade, use, dimensions, end matching or finger jointing, moisture content and treatment type before grading. This is the information needed for ordering, receiving and traceability.

What terms does SIST EN 14519:2026 define?

• Panelling - solid wood elements mainly for interior use that are machined on the face and regularised on the back.
• Cladding - solid wood elements mainly for exterior use that are machined on the face and regularised on the back.
• Face - the visible surfaces of an element after installation, including edges and chamfers.
• Regularised - a surface condition where some areas of a face remain untouched during machining.
• Tongue and groove - a matching edge profile with a groove on one side and a tongue on the opposite side, or a similar interlocking profile.
• End matching - an end profile that includes tongue and/or groove at the end of the element.
• Free grade - a declared grading approach outside the standard grading classes, with the feature set agreed between the parties and classified using Annex A.

Who uses SIST EN 14519:2026?

SIST EN 14519:2026 is used by manufacturers of solid softwood panelling and cladding, timber processors, graders, quality control staff, buyers, specifiers and inspectors. It is also relevant to laboratories and sampling personnel when product lots must be checked for moisture, dimensions, surface condition or grading features.

In practice, these users rely on the standard to specify the wood species, decide the grade, set moisture targets, verify tongue-and-groove fit, prepare marking and compare supplied material with ordered characteristics.

What changed in SIST EN 14519:2026 from the previous edition?

SIST EN 14519:2026 supersedes EN 14519:2005. The stated technical changes are:

• alignment of the product standards series EN 14519, EN 15146 and EN 14951
• updated scope, normative references and terms and definitions
• scope opened to all softwood species
• more precise moisture content ranges for panelling and cladding
• CEN/TS 12169 used for sampling instead of Annex C
• merging and alignment of the Technical specifications and Marking clauses
• deletion of Annex B and Annex C

Which standards are used with SIST EN 14519:2026?

• EN 844 - provides timber terminology.
• EN 1309-3 - gives the method for measuring features and biological degradations.
• EN 13183-1, EN 13183-2, EN 13183-3 - give three methods for determining or estimating moisture content.
• EN 13307-1 - sets requirements for timber blanks and semi-finished profiles for non-structural uses and is used for permitted finger jointing.
• EN 13647 - provides the method for measuring geometrical characteristics.
• EN 13756 - provides terminology used in the document.
• EN 13556 - supports botanical naming and abbreviations for wood species in marking.
• CEN/TS 12169 - supports sampling when a lot is disputed.
• EN 14915 - is the related standard for durability, reaction to fire, dangerous substances and CE-marking under CPR.

What does the SIST EN 14519:2026 document contain?

The document contains a figure showing the common tongue-and-groove cross section and the key profile dimensions. It contains grading tables for softwoods except maritime pine and for maritime pine, plus a table for free-grade classification in Annex A.

It also contains moisture content requirements, dimensional tolerances for thickness, width and length, and guidance on deformation and machining. Clause 7 gathers the marking items needed for product identification and traceability in supply, receiving and inspection.

SLOVENSKI STANDARD
01-september-2026
Notranje in zunanje obloge (opaž) iz masivnega lesa iglavcev - Profili z utorom in
peresom
Solid softwood panelling and cladding - Machined profiles with tongue and groove
Innen- und Außenbekleidungen aus massivem Nadelholz - Profilholz mit Nut und Feder
Lambris et bardages en bois massif résineux - Profilés usinés avec rainure et languette
Ta slovenski standard je istoveten z: EN 14519:2026
ICS:
79.080 Polizdelki iz lesa Semi-manufactures of timber
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 14519
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2026
EUROPÄISCHE NORM
ICS 79.080 Supersedes EN 14519:2005
English Version
Solid softwood panelling and cladding - Machined profiles
with tongue and groove
Lambris et bardages en bois massif résineux - Profilés Innen- und Außenbekleidungen aus massivem
usinés avec rainure et languette Nadelholz - Profilholz mit Nut und Feder
This European Standard was approved by CEN on 4 June 2026.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14519:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Symbols and abbreviations . 5
5 Requirements . 5
5.1 General. 5
5.2 Grading . 5
5.2.1 General. 5
5.2.2 Grading classes . 5
5.2.3 Free grade . 9
5.3 Moisture content . 9
5.4 Geometrical characteristics . 9
5.4.1 General. 9
5.4.2 Profiles . 9
5.4.3 Dimensions and tolerances . 9
5.4.4 Machining . 11
6 Sampling . 11
7 Technical specifications and marking . 11
Annex A (normative) Requirements for the classification of a free grade . 13
Bibliography . 14

European foreword
This document (EN 14519:2026) has been prepared by Technical Committee CEN/TC 175 “Round and
sawn timber”, the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by January 2027, and conflicting national standards shall be
withdrawn at the latest by January 2027.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 14519:2005.
In comparison with the previous edition, the following technical modifications have been made:
— alignment of the series of product standards: EN 14519, EN 15146 and EN 14951:
— scope, normative references and terms and definitions updated;
— scope opened to all softwood species;
— ranges of moisture content for panelling and cladding were specified more precisely;
— CEN/TS 12169 was referenced for sampling methods instead of Annex C;
— clauses “Technical specifications” and “Marking” were merged and aligned;
— Annex B and Annex C were deleted.
This document is one of a series of standards concerning solid wood panelling and cladding and wood
flooring (including parquet).
Any feedback and questions on this document should be directed to the users’ national standards body. A
complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus,
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
1 Scope
This document specifies characteristics of solid wood panelling and cladding with tongue and groove
machined from softwoods (wood of trees of the botanical group gymnosperms).
Products are intended for interior or exterior use.
This document covers treated, untreated and surface treated products, including those made of thermally
and chemically modified wood, as well as finger jointed products.
This document does not cover processes for treatment, surface coating or modification.
NOTE Where further regulatory provisions (e.g. durability, reaction to fire, dangerous substances and generally
CE-marking according to CPR) are required, harmonized EN 14915 applies.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 844, Round and sawn timber — Terminology
EN 1309-3, Round and sawn timber — Methods of measurements — Part 3: Features and biological
degradations
EN 13183-1, Moisture content of a piece of sawn timber — Part 1: Determination by oven dry method
EN 13183-2, Moisture content of a piece of sawn timber — Part 2: Estimation by electrical resistance method
EN 13183-3, Moisture content of a piece of sawn timber — Part 3: Estimation by capacitance method
EN 13307-1, Timber blanks and semi-finished profiles for non-structural uses — Part 1: Requirements
EN 13647, Wood flooring and wood panelling and cladding — Determination of geometrical characteristics
EN 13756, Wood flooring and parquet — Terminology
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 13756, EN 844 and the following
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1
panelling
elements of solid wood mainly for interior use which have been machined on the face and have been
regularised on the back
3.2
cladding
elements of solid wood mainly for exterior use which have been machined on the face and have been
regularised on the back
3.3
face
visible surfaces of an element when installed
Note 1 to entry: This includes edges and chamfers.
3.4
regularised
feature of the surface of an element where some areas of a face remain untouched during
the machining process
3.5
tongue and groove
elements with groove on one edge and a corresponding tongue on the opposite edge (or similar
interlocking profiles)
3.6
end matching
profile at the end of the panelling or cladding including tongue and/or groove
4 Symbols and abbreviations
Symbols and abbreviations used in this document are given in Figure 1, in Table 3 and Table 4.
5 Requirements
5.1 General
The softwood species shall be selected with regard to the appearance expected, the suitability for the
intended purpose and the general characteristics of the species itself. All requirements apply at the time of
production, unless otherwise specified.
Finger jointing according to EN 13307-1 is permitted if specified e.g. by the manufacturer and agreed upon
by the parties.
NOTE Regarding the bonding and glue type other standards and regulations can apply.
5.2 Grading
5.2.1 General
Grading applies to the face only, unless otherwise specified. Machining requirements are covered in 5.4.4
and apply to all grades of all species.
The measurement of features shall be in accordance with EN 1309-3.
The elements may be finished with surface coating. The grading shall be done before coating.
Additionally, to the grading classes given in 5.2.2 different grading classes and quality criteria for panelling
and cladding exist on national and company levels in Europe. Hence, free grades according to 5.2.3 may
also be used.
5.2.2 Grading classes
Grading classes and the features for softwoods (except maritime pine) are given in Table 1. Grading and
the features for maritime pine (Pinus pinaster) are given in Table 2.
A combined grading class, e.g. A/B, is permitted if agreed upon and specified e.g. by the manufacturer.
Table Error! Unknown op code for conditional.1 — Grading classes of softwoods (except maritime
pine)
a b
Features Grade A Grade B
...