EN 14915:2006

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Solid wood panelling and cladding - Characteristics, evaluation of conformity and markingLambris et bardages en bois - Caractéristiques, évaluation de conformité et marquageWand- und Deckenbekleidung aus Massivholz im Innen- und Außenbereich - Eingenschaften, Bewertung der Konformität und KennzeichnungTa slovenski standard je istoveten z:EN 14915:2006SIST EN 14915:2007en79.080Polizdelki iz lesaSemi-manufactures of timberICS:SLOVENSKI
STANDARDSIST EN 14915:200701-marec-2007

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14915August 2006ICS 79.080 English VersionSolid wood panelling and cladding - Characteristics, evaluationof conformity and markingLambris et bardages en bois - Caractéristiques, évaluationde conformité et marquageWand- und Deckenbekleidung aus Massivholz im Innen-und Außenbereich - Eingenschaften, Bewertung derKonformität und KennzeichnungThis European Standard was approved by CEN on 24 May 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14915:2006: E

Page Foreword.3 1 Scope.4 2 Normative references.4 3 Terms and definitions.5 4 Characteristics for internal and external wall and ceiling.5 4.1 General.5 4.2 Characteristics for solid wood panelling for use on internal walls and ceilings.5 4.3 Characteristics for solid wood sidings for use on internal walls.6 4.4 Characteristics for solid wood sidings for use on external walls.6 4.5 Characteristics for solid wood cladding for use on external walls and ceilings.6 4.6 Durability against biological attack.6 4.6.1 Natural durability.6 4.6.2 Timber treated against biological attack.6 5 Determination of the characteristics.7 5.1 Reaction to fire.7 5.2 Release of formaldehyde.9 5.3 Content of pentachlorophenol.10 5.4 Water vapour permeability.10 5.5 Sound absorption.10 5.6 Thermal conductivity.10 6 Evaluation of conformity.11 6.1 General.11 6.2 Initial type testing or assessment.11 6.3 Factory production control (FPC).12 6.3.1 General.12 6.3.2 Procedures when control criteria are not met.12 6.3.3 Record of documentation.12 6.3.4 FPC testing.12 7 Marking.14 Annex A (normative)
Simplified encoding system for solid wood panelling and cladding.15 Annex B (informative)
General consideration regarding durability of wood.16 B.1 General precautions (based on EN 335-2:1992, Annex A).16 B.2 Natural or conferred durability of solid wood (extract from EN 335-2:1992,
Annex A).16 B.3 Construction.17 Annex C (normative)
Formaldehyde classes.18 C.1 General.18 C.2 Panelling and cladding to be tested.18 C.3 Materials to be tested.18 Annex ZA (informative)
Clauses of this European Standard addressing the provisions of the EU Construction Products Directive.20 ZA.1 Scope and relevant characteristics.20 ZA.2 Procedure for the attestation of conformity of solid wood panelling and cladding.21 ZA.2.1 Systems of attestation of conformity.21 ZA.2.2 EC Certificate and Declaration of conformity.23 ZA.3 CE marking and labelling.25 Bibliography.28

EN 1309-1:1997 and the following apply. 3.1 siding material attached to interior or exterior of the building wall where length predominates the other two dimensions, having reduced thickness NOTE North American term synonymous with wall panelling and cladding 3.2 assembled test specimen products put together, according to their method of assembly as given by the manufacturer (e.g. joined tongue to groove), to form a panelling or cladding assembly for the purpose of testing 4 Characteristics for internal and external wall and ceiling 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;  content of pentachlorophenol: see 5.3;

Table 1 — Classes of reaction to fire performance Product Product detail e Minimum mean density f (kg/m3) Minimum thicknesses, 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, d2 -“- -“- 390 12 / 8 -“- D-s2, d0 Panelling and cladding b -“- 390 9 / 6 With open air gap ≤≤≤≤ 20 mm behind D-s2, d0 -“- -“- 390 18 / 12 Without air gap or with open air gap behind D-s2, d0 Wood ribbon elements h Wood pieces mounted on a support frame i 390 18 Surrounded by open air on all sides j D-s2, d0 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 Commission Decision 2000/147/EC Annex Table 1. This decision is currently under review in respect to façade applications. 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 below. 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 to 300 mm of at least Class B-s1,d0 and at distances more than 300 mm of at least Class D-s2,d0.

Key t1
total thickness t2
minimum thickness at any point of the profile Figure 1 — Profiles for solid wood panelling and cladding
Maximum exposed area of wood ribbon element: 2n (t+w) + a ≤ 1,10 where
n
is the number of wood pieces per metre;
t
is the thickness of each wood piece, in metres;
w
is the width of each wood piece, in metres;
a
is the exposed area of wood support frame (if any), in m2, per m2 of wood ribbon element. Figure 2 — Maximum exposed area
5.2 Release of formaldehyde Solid wood as such, without chemical treatment, without adhesive, without coating or finishing, has no formaldehyde release of significance and may be classified E1. The formaldehyde release of other solid wood panelling and cladding products shall be determined according to Annex C. The declared values are expressed in term of classes.

Solid wood 300 500 700 1 000 50 70 90 110 a
For other densities, interpolation is possible.
5.5 Sound absorption If the sound absorption coefficient of a product is required, it shall either taken from Table 3 or, if the manufacturer wishes to declare a better value, obtained by testing the product as an assembled test specimen to EN ISO 354 and the result expressed according to EN ISO 11654. NOTE The sound absorption depends on finishing, geometrical characteristics etc. Table 3 — Sound absorption coefficient Sound absorption coefficient
Wood type 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. 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 12524.

t is the uniform thickness of the wood panelling and cladding in m;
λ is the thermal conductivity in W/m K. Table 4 — Design thermal conductivity values () (in conformity with EN 12524) Wood type Mean density a
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
For densities not given in this table,
may be found by interpolation.
6 Evaluation of conformity 6.1 General The conformity of solid wood panelling and cladding products with the requirements of this European Standard shall be demonstrated by:  initial type testing or assessment;  factory production control by the manufacturer. Sampling shall be carried out at random if tests are necessary. 6.2 Initial type testing or assessment Initial type testing/assessment shall be performed to demonstrate conformity with this European Standard or be demonstrated according to information given in this European Standard. Tests previously performed in accordance with the provisions of this European Standard (same product, same characteristic, test method, system of attestation of conformity etc.) may be taken into account for initial type testing. For the purposes of testing, products may be grouped into families, where it is considered that the result for a given characteristic from any one product within the family are representative for all other products within that family.
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