EN 14915:2013

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Wand- und Deckenbekleidungen aus Massivholz - Eigenschaften, Bewertung der Konformität und KennzeichnungLambris et bardages bois - Caractéristiques, évaluation de conformité et marquageSolid wood panelling and cladding - Characteristics, evaluation of conformity and marking79.080Polizdelki iz lesaSemi-manufactures of timberICS:Ta slovenski standard je istoveten z:EN 14915:2013SIST EN 14915:2013en,fr,de01-december-2013SIST EN 14915:2013SLOVENSKI
STANDARDSIST EN 14915:2007/AC:2007SIST EN 14915:20071DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14915
September 2013 ICS 79.080 Supersedes EN 14915:2006English Version
Solid wood panelling and cladding - Characteristics, evaluation of conformity and marking
Lambris et bardages bois - Caractéristiques, évaluation de conformité et marquage
Wand- und Deckenbekleidungen aus Massivholz - Eigenschaften, Bewertung der Konformität und Kennzeichnung This European Standard was approved by CEN on 8 August 2013.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14915:2013: ESIST EN 14915:2013

Page Foreword . 4 1 Scope . 5 2 Normative references . 5 3 Terms and definitions . 6 4 Requirements . 6 4.1 General . 6 4.2 Characteristics for solid wood panelling for use on internal walls and ceilings . 6 4.3 Characteristics for solid wood sidings for use on internal walls . 7 4.4 Characteristics for solid wood sidings for use on external walls . 7 4.5 Characteristics for solid wood cladding for use on external walls and ceilings . 7 4.6 Durability against biological attack . 8 4.6.1 Biological durability. 8 4.6.2 Timber treated against biological attack . 8 5 Testing, assessment and sampling methods . 8 5.1 Reaction to fire . 8 5.2 Dangerous substances . 10 5.2.1 Formaldehyde release . 10 5.2.2 Content of pentachlorophenol . 11 5.3 Release of other dangerous substances . 11 5.4 Water vapour permeability . 11 5.5 Sound absorption . 11 5.6 Thermal conductivity . 12 5.7 Resistance to fixing . 12 6 Evaluation of conformity . 13 6.1 General . 13 6.2 Initial type testing or assessment . 13 6.3 Factory production control (FPC) . 13 6.3.1 General . 13 6.3.2 Procedures when control criteria are not met . 13 6.3.3 Record of documentation . 14 6.3.4 FPC testing . 14 7 Marking, labelling and packaging . 15 Annex A (informative)
Simplified encoding system for solid wood panelling and cladding . 16 Annex B (informative)
General consideration regarding durability of wood . 17 B.1 General precautions (based on EN 335:2013) . 17 B.2 Natural or conferred durability of solid wood (extract from EN 335:2013) . 17 B.3 Construction . 18 Annex C (normative)
Formaldehyde classes . 19 C.1 General . 19 C.2 Panelling and cladding to be tested . 19 C.3 Materials to be tested . 19 Annex ZA (informative)
Clauses of this European Standard addressing the provisions of the EU Construction Products Directive . 21 ZA.1 Scope and relevant characteristics . 21 ZA.2 Procedure for the attestation of conformity of solid wood panelling and cladding . 23 ZA.2.1 Systems of attestation of conformity . 23 ZA.2.2 EC Certificate and Declaration of Conformity . 25 ZA.3 CE marking and labelling . 27 SIST EN 14915:2013

It provides for the evaluation of conformity 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.
2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 335:2013, Durability of wood and wood-based products — Use classes: definitions, application to solid wood and wood-based products EN 350-1, Durability of wood and wood-based products — Natural durability of solid wood — Part 1: Guide to the principles of testing and classification of the natural durability of wood EN 350-2, Durability of wood and wood-based products — Natural durability of solid wood — Part 2: Guide to natural durability and treatability of selected wood species of importance in Europe EN 351-1, Durability of wood and wood based-products — Preservative-treated solid wood — Part 1: Classification of preservative penetration and retention EN 599-2, Durability of wood and wood-based products — Performance of preventive wood preservatives as determined by biological tests — Part 2: Classification and labelling EN 717-1, Wood based panels — Determination of formaldehyde release — Part 1: Formaldehyde emission by the chamber method EN 717-2, Wood based panels — Determination of formaldehyde release — Part 2: Formaldehyde release by the gas analysis method EN 844-9:1997, Round and sawn timber — Terminology — Part 9: Terms relating to features of sawn timber EN 1309-1:1997, Round and sawn timber — Method of measurement of dimensions — Part 1: Sawn timber SIST EN 14915:2013

4.1 General Characteristics shall be assessed and declared when subject to regulatory requirements and may be assessed and declared when not subject to such requirements. 4.2 Characteristics for solid wood panelling for use on internal walls and ceilings The following characteristics shall be determined:  reaction to fire: see 5.1,  release of formaldehyde: see 5.2.1,  content of pentachlorophenol: see 5.2.2,  water vapour permeability: see 5.4, SIST EN 14915:2013

4.6.2.4 Penetration The minimum penetration shall be declared in terms of penetration classes listed in EN 351-1. 4.6.2.5 Retention The mean retention in the analytical zone (see EN 351-1) shall be equal to or greater than the retention requirement for the preservative used in the declared use class. 5 Testing, assessment and sampling methods
5.1 Reaction to fire The reaction to fire performance of a solid wood panelling and cladding product, whether treated or not, shall be classified in accordance with EN 13501-1, after being tested in accordance with the test standards given therein and the relevant reaction to fire class declared. When tested, the product shall be mounted and fixed in accordance with the same mounting and fixing conditions used for obtaining the classification of products without the need of testing (i.e. those in relevant footnotes a to j of Table 1). SIST EN 14915:2013

Material
Product detail e Minimum mean density f (kg/m3) Minimum thickness total/ minimum g
(mm) End-use condition d
Class c
Panelling
and cladding a
Wood pieces with or without tongue and groove and with or without profiled surface 390 9/6 Without air gap or with closed air gap behind D - s2,d 2 12/8 D - s2,d 0 Panelling and cladding b
Wood pieces with or without tongue and groove and with or without profiled surface 390 9/6 With open air gap ≤ 20 mm behind D - s2,d 0 18/12 Without air gap or with open air gap behind Wood ribbon elements h
Wood pieces mounted on a support frame i
390 18 Surrounded by open air on all sides j
D - s2,d 0 a Mounted mechanically on a wood batten support frame, with the gap closed or filled with a substrate of at least class A2 - s1, d0 with minimum density of 10 kg/m3 or filled with a substrate of cellulose insulation material of at least class E and with or without a vapour barrier behind. The wood product shall be designed to be mounted without open joints. b Mounted mechanically on a wood batten support frame, with or without an open air gap behind. The wood product shall be designed to be mounted without open joints. c Class as provided for in Table 1 of the annex to Commission Decision 2000/147/EC. d An open air gap may include possibility for ventilation behind the product, while a closed air gap will exclude such ventilation. The substrate behind the air gap shall be of at least class A2 - s1, d0 with a minimum density of 10 kg/m3. Behind a closed air gap of maximum 20 mm and with vertical wood pieces, the substrate may be of at least class D - s2, d0. e Joints include all types of joints, e.g. butt joints and tongue and groove joints. f Conditioned according to EN 13238. g As illustrated in Figure 1 below. Profiled area of the exposed side of the panel not more than 20 % of the plane area, or 25 % if measured at both exposed and unexposed side of the panel. For butt joints, the larger thickness applies at the joint interface. h Rectangular wood pieces, with or without rounded corners, mounted horizontally or vertically on a support frame and surrounded by air on all sides, mainly used close to other building elements, both in interior and exterior applications. i Maximum exposed area (all sides of rectangular wood pieces and wood support frame) not more than 110 % of the total plane area, see Figure 2. j Other building elements closer than 100 mm from the wood ribbon element (excluding its support frame) shall be of at least class A2 - s1, d0, at distances 100 mm - 300 mm of at least class B - s1, d0 and at distances more than 300 mm of at least class D - s2, d0.
1) This table and Figures 1 and 2 correspond to Table 2 and Figures a and b respectively of the Commission Decision 2006/213/EC (OJEU L79/27 of 16.3.2006). SIST EN 14915:2013

Table 1 (continued)
Figure 1 – Profiles for solid wood panelling and cladding
Maximum exposed area of wood ribbon element:
2n (t+wc + a ≤ 1,10 where n
is number of wood pieces per metre t
is thickness of each wood piece, in metre w is width of each wood piece, in metre a
is exposed area of wood support frame (if any), in m2, per m2 of wood ribbon element Figure 2 – Maximum exposed area 5.2 Dangerous substances 5.2.1 Formaldehyde release2)
The formaldehyde release of solid wood panelling and cladding products shall be determined according to Annex C. The declared values are expressed in term of classes.
2) Products CE marked according to this European Standard emitting formaldehyde above class E1 might be prohibited in some Member States. SIST EN 14915:2013

kg/m3 Water vapour resistance factor µ wet dry
timber 450 500 700
20 20 50
50 50 200
a For other densities, interpolation is possible.
5.5 Sound absorption If the sound absorption coefficient of a product is required, it shall either be taken from Table 3 or, if the manufacturer wishes to declare a better value, obtained by testing the product as assembled panelling to
EN ISO 354 and the result expressed according to EN ISO 11654. NOTE The sound absorption depends on finishing, geometrical characteristics, etc.
3) EN ISO 10456 is currently impacted by EN ISO 10456:2007/AC:2009. SIST EN 14915:2013

Wood type Sound absorption coefficient Frequency range 250 Hz to 500 Hz Frequency range 1 000 Hz to 2 000 Hz Solid wood panelling and cladding 0,10 0,30 5.6 Thermal conductivity The thermal conductivity shall be determined only for uses subject to thermal insulation requirements for solid wood panelling or sidings for use on internal walls and ceilings. It shall either be determined according to EN 12664 or given by using tabulated values related to density as shown in Table 4, taken from EN ISO 10456. The thermal resistance R (m2 K/W) of solid wood panelling and cladding of uniform thickness is given by the formula: where
t is the uniform minimum thickness of the wood panelling and cladding, in metres; λ is the thermal conductivity, in W/m.K. Table 4 – Design thermal conductivity values () (in conformity with EN ISO 10456) Wood type Mean densitya
at a moisture content of 12 % in kg/m3 Thermal conductivity
in W/(m.K) (design value)
Solid wood 300 400 500 600 700 1 000 0,09 0,11 0,13 0,15 0,18 0,24 a
5.7 Resistance to fixing Resistance to fixing of solid wood is dependent on species and with higher density hardwoods may necessitate pre-drilling, especially if the wood has been dried. For wood species with an average density greater than 600 kg/m3 (at 20 % moisture content) the manufacturer shall indicate whether pre-drilling is either advisable or necessary.
When mechanically fixed (by means of nails, anchors, etc.) to walls/ceiling, the panelling/cladding shall be designed to take into account its own weight and other possible loads acting on it, e.g. wind load.
λtR=SIST EN 14915:2013
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