SIST EN 14915:2013+A1:2017
(Main)Solid wood panelling and cladding - Characteristics, requirements and marking
Solid wood panelling and cladding - Characteristics, requirements and marking
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.
Wand- und Deckenbekleidungen aus Massivholz - Eigenschaften, Anforderungen und Kennzeichnung
Lambris et bardages en bois - Caractéristiques, exigences et marquage
Notranje in zunanje obloge iz masivnega lesa - Lastnosti, zahteve in označevanje
Ta evropski standard opredeljuje in navaja veljavne značilnosti in primerne preskusne metode za določanje lastnosti izdelkov iz masivnega lesa, ki se uporabljajo za notranje in zunanje obloge:
– stenske in stropne obloge za notranjo uporabo,
– stenske in stropne obloge za zunanjo uporabo.
»Omogoča ocenjevanje in preverjanje nespremenljivosti lastnosti teh izdelkov in podaja zahteve za njihovo označevanje«.
Ta evropski standard ne vključuje plošč, ki se uporabljajo kot ojačitveni elementi.
Ta evropski standard ne vključuje visečih lesenih stropnih opažev.
Ta evropski standard ne vključuje procesov za obdelavo, premazovanje ali spreminjanje površin.
Ta evropski standard ne vključuje izdelkov z laminirano plastjo.
Ta evropski standard vključuje vse obdelane, neobdelane in površinsko premazane izdelke, vključno s tistimi iz toplotno ali kemično obdelanega lesa ter izdelke z zobatimi spoji in robno lepljenimi izdelki.
OPOMBA: Predpise za površinske premaze in obdelavo lahko najdete v dokumentih, veljavnih na mestu uporabe.
Ta evropski standard vključuje izdelke, navedene v standardih EN 14519, EN 15146 in EN 14951, in druge izdelke iz masivnega lesa, proizvedene za stenske in stropne opaže.
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Wand- und Deckenbekleidungen aus Massivholz - Eigenschaften, Anforderungen und KennzeichnungLambris et bardages en bois - Caractéristiques, exigences et marquageSolid wood panelling and cladding - Characteristics, requirements and marking79.080Polizdelki iz lesaSemi-manufactures of timberICS:Ta slovenski standard je istoveten z:EN 14915:2013+A1:2017SIST EN 14915:2013+A1:2017en,fr,de01-september-2017SIST EN 14915:2013+A1:2017SLOVENSKI
STANDARDSIST EN 14915:20131DGRPHãþD
SIST EN 14915:2013+A1:2017
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14915:2013+A1
June
t r s y ICS
y {ä r z r Supersedes EN
s v { s wã t r s uEnglish Version
Solid wood panelling and cladding æ Characteristicsá requirements and marking Lambris et bardages en bois æ Caractéristiquesá exigences et marquage
Wandæ und Deckenbekleidungen aus Massivholz æ Eigenschaftená Anforderungen und Kennzeichnung This European Standard was approved by CEN on
z August
t r s u and includes Amendment
s approved by CEN on
s r April
t r s yä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
9
t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s v { s wã t r s u ªA sã t r s y ESIST EN 14915:2013+A1:2017
EN 14915:2013+A1:2017 (E) 2 Contents
Page European foreword . 3 1 Scope . 4 2 Normative references . 4 3 Terms and definitions . 5 4 Durability against biological attack . 5 4.1 Biological durability . 5 4.2 !Wood" treated against biological attack. 6 5 Testing, assessment and sampling methods . 6 5.1 Reaction to fire . 6 5.2 Dangerous substances . 8 5.3 Release of other dangerous substances . 9 5.4 Water vapour permeability . 9 5.5 Sound absorption . 9 5.6 Thermal conductivity . 10 5.7 Resistance to fixing . 10 6 Assessment and verification of constancy of performance - AVCP . 10 6.1 General . 10 6.2 Type testing . 11 6.3 Factory production control (FPC) . 14 7 Marking, labelling and packaging . 18 Annex A (informative)
Simplified encoding system for solid wood panelling and cladding20 Annex B (informative)
General consideration regarding durability of wood . 21 B.1 General precautions (based on EN 335:2013) . 21 B.2 Natural or conferred durability of solid wood (extract from EN 335:2013) . 21 B.3 Construction . 22 Annex C (normative)
Formaldehyde classes . 23 C.1 General . 23 C.2 Panelling and cladding to be tested . 23 C.3 Materials to be tested . 23 Annex ZA (informative)
Relationship of this European Standard with Regulation (EU)
No. 305/2011 . 25 ZA.1 Scope and relevant characteristics . 25 ZA.2 System of Assessment and Verification of Constancy of Performance (AVCP) . 26 ZA.3 Assignment of AVCP tasks . 26 Bibliography . 29
SIST EN 14915:2013+A1:2017
EN 14915:2013+A1:2017 (E) 3 European foreword This document (EN 14915:2013+A1:2017) 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 December 2017, and conflicting national standards shall be withdrawn at the latest by March 2019. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document includes Amendment 1 approved by CEN on 10 April 2017. This document supersedes !EN 14915:2013". The start and finish of text introduced or altered by amendment is indicated in the text by tags !". This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). !For relationship with EU Construction Products Regulation (CPR), see informative Annex ZA, which is an integral part of this standard." 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 14915:2013+A1:2017
EN 14915:2013+A1:2017 (E) 4 1 Scope 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. 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, Durability of wood and wood-based products - Testing and classification of the durability to biological agents of wood and wood-based materials" 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+A1:2017
EN 14915:2013+A1:2017 (E) 5 EN 12664, Thermal performance of building materials and products - Determination of thermal resistance by means of guarded hot plate and heat flow meter methods - Dry and moist products of medium and low thermal resistance EN 13501-1, Fire classification of construction products and building elements — Part 1: Classification using data from reaction to fire tests EN 13556, Round and sawn timber - Nomenclature of timbers used in Europe EN 13756:2002, Wood flooring - Terminology EN 13986, Wood-based panels for use in construction — Characteristics, evaluation of conformity and marking EN ISO 354, Acoustics — Measurement of sound absorption in a reverberation room (ISO 354) EN ISO 10456:2007, Building materials and products - Hygrothermal properties -Tabulated design values and procedures for determining declared and design thermal values (ISO 10456:2007) EN ISO 11654, Acoustics — Sound absorbers for use in buildings — Rating of sound absorption (ISO 11654) EN ISO 12572, Hygrothermal performance of building materials and products - Determination of water vapour transmission properties (ISO 12572) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13756:2002, EN 844-9:1997 and EN 1309-1:1997 and the following apply. 3.1 siding North American term, synonymous with exterior cladding; material attached to exterior of the building wall where length predominates over the other two dimensions, having reduced thickness 3.2 assembled panelling/cladding 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 !Note 1 to entry: For the purpose of this document panelling relates to interior applications; cladding to exterior applications" ! 4 Durability against biological attack 4.1 Biological durability !If sapwood is not specifically excluded this shall be identified." If the species is listed in !EN 350", the biological durability shall be as given therein; otherwise it shall be assessed in accordance with !EN 350". SIST EN 14915:2013+A1:2017
EN 14915:2013+A1:2017 (E) 6 4.2 !Wood" treated against biological attack 4.2.1 General !Wood" treated against biological attack shall meet regulatory requirements valid in the place of use of the products. Preservative treated products shall be defined by: — use class in accordance with EN 335, — wood preservative in accordance with EN 599-2, — penetration class in accordance with EN 351-1, — retention of preservative in accordance with EN 351-1. 4.2.2 !Wood" Any machining, boring, planing, etc. shall be completed before preservative treatment. In case of wane, the bark shall be removed. 4.2.3 Preservatives Wood preservatives used shall conform to the performance requirements given in EN 599-2 appropriate for the use class. 4.2.4 Penetration The minimum penetration shall be declared in terms of penetration classes listed in EN 351-1. 4.2.5 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). !Given that climatic conditions provided for testing in EN 13501-1 represent average interior climatic conditions, as an alternative for exterior use to represent average exterior conditions, the test specimen may be conditioned at 20 °C and 65 % relative humidity." SIST EN 14915:2013+A1:2017
EN 14915:2013+A1:2017 (E) 7 In case the product meets the requirements given in Table 11) it may be classified without the need for further testing (CWFT) in one of the appropriate classes shown therein. In this case, the relevant reaction to fire class shall be declared (together with the corresponding mean density of the product, the overall thickness of the product as well as the end-use conditions). Table 1 — Classes of reaction to fire performance 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+A1:2017
EN 14915:2013+A1:2017 (E) 8
Table 1 (continued)
Figure 1 — Profiles for solid wood panelling and cladding
Maximum exposed area of wood ribbon element:
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 !shall be" expressed in term of classes. 5.2.2 Content of pentachlorophenol Solid wood panelling and cladding as such, without chemical treatment, without adhesive, without coating or finishing, does not contain PCP. If the product contains raw materials that include PCP (may concern only soft wood treated against blue stain), then the product shall be tested in accordance with CEN/TR 14823. In case the value of 5 × 10-6n is exceeded, the indication “PCP > 5 × 10-6n shall be added to the marking. In case the value is less than 5 × 10-6n, the indication PCP
¶
w
s r-6n shall be added to the marking.
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+A1:2017
EN 14915:2013+A1:2017 (E) 9 5.3 Release of other dangerous substances National regulations on dangerous substances may require, verification and declaration on release, and sometimes content, of other dangerous substances, in addition to those dealt with in other clauses, when construction products covered by this standard are placed on those markets. In the absence of European harmonised test methods, verification and declaration on release/content should be done taking into account national provisions in the place of use. NOTE An informative database covering European and national provisions on dangerous substances is available at the Construction web site on EUROPA accessed through: http://ec.europa.eu/enterprise/construction/cpd-ds/. 5.4 Water vapour permeability If water vapour permeability is required, either the water vapour resistance factor of the product tested as assembled panelling shall either be taken from Table 2 or, if the manufacturer wishes to declare a better value, obtained by testing the product as assembled panelling according to EN ISO 12572. Table 2 — Characteristic values of water vapour permeability of wood as given in EN ISO 10456:20073, Table 3 Wood type Density a 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. Table 3 — Sound absorption coefficient 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
3) EN ISO 10456 is currently impacted by EN ISO 10456:2007/AC:2009. SIST EN 14915:2013+A1:2017
EN 14915:2013+A1:2017 (E) 10 5.6 Thermal conductivity The thermal conductivity shall be determined only for uses subject to thermal insulation requirements for solid wood panelling !deleted text" 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;
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. ! 6 Assessment and verification of constancy of performance - AVCP 6.1 General The compliance of solid wood panelling product and cladding product with the requirements of this standard and with the performance declared by the manufacturer in the DoP shall be demonstrated by: determination of the product-type on the basis of type testing; factory production control by the manufacturer, including product assessment.
λtR=SIST EN 14915:2013+A1:2017
EN 14915:2013+A1:2017 (E) 11 6.2 Type testing 6.2.1 General Performance related to characteristics included in this standard shall be determined when the manufacturer intends to declare the respective performance unless the standard gives provisions for declaring them without performing tests. (e.g. use of previously existing data, CWFT and conventionally accepted performance).
Assessment previously performed in accordance with the provisions of this standard, may be taken into account provided that they were made to the same or a more rigorous test method, under the same AVCP system on the same product-type, such that the results are applicable to the product in question. NOTE 1 Same AVCP system means testing by an independent third party laboratory where relevant, under the responsibility of a notified product certification body where relevant.
For the purposes of assessment, the manufacturer's products may be grouped into families, where it is considered that the results for one or more characteristics from any one product within the family are representative for that same characteristics for all products within that same family. NOTE 2 Products may be grouped in different families for different characteristics. Reference to the assessment method standards should be made to allow the selection of a suitable representative sample. In addition, the determination of the product-type shall be performed for all essential characteristics included in the standard for which the manufacturer declares the performance: — at the beginning of the production of a new or modified solid wood panelling product and cladding product (unless it is a member of a same product range), or — at the beginning of a new or modified method of production (where this may affect the stated properties); or — they shall be repeated for the appropriate essential characteristic(s), whenever a change occurs in the solid wood panelling product and cladding product design, in the raw material or in the supplier of the components, or in the method of production (subject to the definition of a family), which would affect significantly one or more of the performance. Where components are used whose performance have already been determined, by the component manufacturer, on the basis of assessment methods of other product standards, these performance need not be re-assessed. The specifications of these components shall be documented. Products bearing regulatory marking in accordance with appropriate harmonized European specifications may be presumed to have the performance declared in the DoP, although this does not replace the responsibility on solid wood panelling product and cladding product manufacturer to ensure that the solid wood panelling product and cladding product as a whole is correctly manufactured and its component products have the declared performance values. 6.2.2 Test samples, testing and compliance criteria The number of samples of solid wood panelling product and cladding product to be tested/assessed shall be in accordance with Table 5. SIST EN 14915:2013+A1:2017
EN 14915:2013+A1:2017 (E) 12 Table 5 — Number of samples to be tested and compliance criteria Characteristic Requirement Assessment method
No. of samples [to be assessed] Compliance criteria
Reaction to fire 5.1 Table 1 or
EN 13501-1 CWFT,
see Table 1 EN 13501-1 Table 1 Classes according to
EN 13501-1 Release of dangerous substances Release of formaldehyde 5.2.1 Annex C see Annex C Only for internal use
According to Annex C
E1 or E2
Content of pentachlorophenol 5.2.2 CEN/TR 14823 See
CEN/TR 14823 Only for internal use
according to CEN/TR 14823
> 5 × 10-6n or
¶
w
s r-6n
Release of other dangerous substances 5.3 - As relevant according to 5.3 Only for internal use
As relevant acc. to 5.3 Water vapour permeability 5.4 Table 2 or
EN ISO 12572 - Not when there is an air gap between cladding/panelling and wall. Tested in accordance with 5.4 and value not under declared value. Sound absorption 5.5 Table 3 or
EN ISO 354 - Only for internal use
Value not under declared value Thermal resistance expressed as thermal conductivity 5.6 5.6 - Only for internal use
See 5.6 Value not under declared value Resistance to fixings 5.7 5.7 - See 5.7 Durability
SIST EN 14915:2013+A1:2017
EN 14915:2013+A1:2017 (E) 13 Biological durability 4.1 For species listed in EN 350 For species and origins not listed in EN 350, assessed according to EN 350
- Natural durability in accordance with EN 350 Value same as the declared value Wood treated against biological attack 4.2 See 4.2.1 - See 4.2.1 6.2.3 Test reports The results of the determination of the product type shall be documented in test reports. All test reports shall be retained by the manufacturer for at least 10 years after the last date of production of the solid wood panelling product and cladding product to which they relate. 6.2.4 Shared other party results A manufacturer may use the results of the product type determination obtained by someone else (e.g. by another manufacturer, as a common service to manufacturers, or by a product developer), to justify his own declaration of performance regarding a product that is manufactured according to the same design and with raw materials, constituents and manufacturing methods of the same kind, provided that: — the results are known to be valid for products with the same essential characteristics relevant for the product performance; — in addition to any information essential for confirming that the product has such same performances related to specific essential c
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