oSIST prEN 13658-2:2017

SLOVENSKI STANDARD
01-oktober-2017
Kovinski profili - Definicije, zahteve in preskusne metode - 2. del: Zunanji omet
Metal lath and beads - Definitions, requirements and test methods - Part 2: External
rendering
Putzträger und Putzprofile aus Metall - Begriffe, Anforderungen und Prüfverfahren - Teil
2: Außenputze
Lattis et cornières métalliques - Définitions, exigences et méthodes d'essai - Partie 2 :
Enduits extérieurs
Ta slovenski standard je istoveten z: prEN 13658-2
ICS:
77.140.65 Jeklene žice, jeklene vrvi in Steel wire, wire ropes and
verige link chains
91.100.10 Cement. Mavec. Apno. Malta Cement. Gypsum. Lime.
Mortar
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
prEN 13658-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2017
ICS 77.140.65; 91.100.10 Will supersede EN 13658-2:2005
English Version
Metal lath and beads - Definitions, requirements and test
methods - Part 2: External rendering
Lattis et cornières métalliques - Définitions, exigences Putzträger und Putzprofile aus Metall - Begriffe,
et méthodes d'essai - Partie 2 : Enduits extérieurs Anforderungen und Prüfverfahren - Teil 2: Außenputze
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 241.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13658-2:2017 E
worldwide for CEN national Members.

prEN 13658-2:2017 (E)
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Requirements . 9
4.1 Fire behaviour . 9
4.1.1 Reaction to fire . 9
4.1.2 Fire resistance . 9
4.2 Requirements for lath . 9
4.2.1 Material . 9
4.2.2 Description . 9
4.2.3 Dimensions . 9
4.3 Requirements for beads . 11
4.3.1 Material . 11
4.3.2 Description . 11
4.3.3 Dimensions . 11
4.4 Dangerous substances . 12
5 Testing and sampling . 12
5.1 Dimensional measurements of lath. 12
5.1.1 General . 12
5.1.2 Thickness or diameter . 12
5.1.3 Length and width . 13
5.1.4 Coating thickness of lath and beads . 13
5.2 Dimensional measurements of beads . 14
5.2.1 General . 14
5.2.2 Thickness or diameter . 14
5.2.3 Length . 14
5.2.4 Straightness . 14
5.2.5 Profile dimensions . 15
5.2.6 Coating thickness . 15
6 Assessment and verification of constancy of performance — AVCP . 15
6.1 General . 15
6.2 Type testing . 16
6.2.1 General . 16
6.2.2 Test samples, testing and compliance criteria . 16
6.2.3 Test reports . 17
6.2.4 Shared other party results . 17
6.2.5 Cascading determination of the product type results . 18
6.3 Factory production control (FPC) . 19
6.3.1 General . 19
6.3.2 Requirements . 19
6.3.3 Product specific requirements . 21
6.3.4 Initial inspection of factory and of FPC . 22
6.3.5 Continuous surveillance of FPC . 22
6.3.6 Procedure for modifications . 23
prEN 13658-2:2017 (E)
6.3.7 One-off products, pre-production products (e.g. prototypes) and products produced
in very low quantity . 23
7 Designation . 24
7.1 Lath . 24
7.2 Beads . 24
8 Marking, labelling and packaging . 25
Annex ZA (informative) Relationship of this European Standard with Regulation
(EU) No. 305/2011 . 37
ZA.1 Scope and relevant characteristics . 37
ZA.2 System of Assessment and Verification of Constancy of Performance (AVCP) . 37
ZA.3 Assignment of AVCP tasks . 37
Bibliography . 40

prEN 13658-2:2017 (E)
European foreword
This document (prEN 13658-2:2017) has been prepared by Technical Committee CEN/TC 241 “Gypsum
and gypsum based products”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13658-2:2005.
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 Regulation (EU)
No. 305/2011.
For relationship with Regulation (EU) No. 305/2011, see informative Annex ZA, which is an integral
part of this document.
The main technical changes that have been made in this new edition of EN 13658-2 are the following:
a) Normative references updated;
b) Terms and Definitions updated;
c) Table 1 updated;
d) Figures updated;
e) Clause 6 and Annex ZA updated in line with the CPR.
This European Standard on Metal lath and beads — Definitions, requirements and test methods consists
of two parts:
— Part 1: Internal plastering;
— Part 2: External rendering.
prEN 13658-2:2017 (E)
1 Scope
This European Standard specifies the requirements and test methods of metal lath and beads for
external rendering.
This European Standard covers metal lath intended to be used for fixing to structures or solid
backgrounds to provide a key to hold the plaster in position. Used in this way it enables fire protecting
rendering systems to be provided.
This European Standard covers metal beads intended to be used to improve the protection of external
angles and also provide features to the external finish of the construction and which can also be used as
movement or expansion beads. They also contribute to fire protection.
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 referenced, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 485-2:2016, Aluminium and aluminium alloys — Sheet, strip and plate — Part 2: Mechanical
properties
EN 485-4:1993, Aluminium and aluminium alloys — Sheet, strip and plate — Part 4: Tolerances on shape
and dimensions for cold-rolled products
EN 573-3:2013, Aluminium and aluminium alloys — Chemical composition and form of wrought
products — Part 3: Chemical composition and form of products
EN 988:1996, Zinc and zinc alloys — Specifications for rolled flat products for building
EN 1364-1:2015, Fire resistance tests for non-loadbearing elements — Part 1: Walls
EN 1364-2:1999, Fire resistance tests for non-loadbearing elements — Part 2: Ceilings
EN 1365-1:2012, Fire resistance tests for loadbearing elements — Part 1: Walls
EN 1365-3:1999, Fire resistance tests for loadbearing elements — Part 3: Beams
EN 1365-4:1999, Fire resistance tests for loadbearing elements — Part 4: Columns
EN 10088 (all parts), Stainless steels
EN 10143:2006, Continuously hot-dip coated steel sheet and strip — Tolerances on dimensions and shape
EN 10169-1:2003, Continuously organic coated (coil coated) steel flat products — Part 1: General
information (definitions, materials, tolerances, test methods)
EN 10218-2:2012, Steel wire and wire products — General — Part 2: Wire dimensions and tolerances
EN 10244-1:2009, Steel wire and wire products — Non-ferrous metallic coatings on steel wire — Part 1:
General principles
EN 10258:1997, Cold-rolled stainless steel and narrow strip and cut lengths — Tolerances on dimensions
and shape
prEN 13658-2:2017 (E)
EN 10264-4:2012, Steel wire and wire products — Steel wire for ropes — Part 4: Stainless steel wire
EN 10346:2015, Continuously hot-dip coated steel flat products for cold forming — Technical delivery
conditions
EN 13501-1:2007+A1:2009, Fire classification of construction products and building elements — Part 1:
Classification using data from reaction to fire tests
EN 13501-2:2016, Fire classification of construction products and building elements — Part 2:
Classification using data from fire resistance tests, excluding ventilation services
EN 13914-1:2016, Design, preparation and application of external rendering and internal plastering —
Part 1: External rendering
EN ISO 1460:1994, Metallic coatings — Hot dip galvanized coatings on ferrous materials — Gravimetric
determination of the mass per unit area (ISO 1460:1992)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 Metal lath:
3.1.1
expanded flat metal lath
corrosion resistant diamond shaped mesh to provide a key for rendering
Note 1 to entry: See Figure 3 a).
3.1.2
expanded corrugated metal lath
corrosion resistant diamond mesh to provide extra stiffness
Note 1 to entry: See Figure 3 b).
3.1.3
expanded ribbed lath
corrosion resistant mesh formed by expanding with integral solid ribs of at least 7 mm height to
provide extra stiffness
Note 1 to entry: See Figure 4.
3.1.4
expanded mini ribbed lath
corrosion resistant mesh formed by expanding with integral solid ribs between 4 mm and 7 mm height
Note 1 to entry: See Figure 4.
3.1.5
stainless steel ribbed lath
stainless steel mesh with integral solid ribs of at least 7 mm height
3.1.6
paperbacked ribbed lath
corrosion protected paperbacked mesh with integral ribs of at least 7 mm height
prEN 13658-2:2017 (E)
3.1.7
standard paperbacked wire lath
corrosion resistant wire spot welded mesh to form a square mesh to provide a key for rendering with a
sheet of cupboard between the horizontal and vertical wires or between the mesh and the reinforcing
wires
Note 1 to entry: See Figures 5 a), 5 b) and 6.
3.1.8
reinforced paperbacked wire lath
same as 3.1.7, but the reinforcing wires are thicker in order to increase stiffness
3.1.9
high ribbed paperbacked wire lath
same as 3.1.8, but with thicker wires to provide still greater stiffness
3.1.10
damp proof regular paperbacked wire lath
same as 3.1.8, but with a bituminous paper bonded to the back of the cardboard sheet to provide extra
damp control
3.1.11
standard wire mesh
corrosion resistant spot welded wire mesh, flat or profiled, to form a square mesh to provide a key for
rendering
Note 1 to entry: See Figure 7.
3.1.12
normal claylath
woven mesh of steel wire with clay pressed on the intersection of the wire and then fired
Note 1 to entry: See Figure 8.
3.1.13
stainless steel claylath
woven mesh of stainless steel wire with clay pressed on the intersection of the wire and then fired
3.2 Metal beads and their uses:
3.2.1
angle bead
corrosion resistant profiled section used to protect the plastered external angles
Note 1 to entry: This section can also be fabricated from wire.
3.2.2
stop bead
corrosion resistant profiled section used to provide a straight and protected edge to receive the plaster
Note 1 to entry: This section can also be fabricated from wire.
prEN 13658-2:2017 (E)
3.2.3
plastered stop bead and soccle bead
corrosion resistant profiled section used to provide a straight and protective edge at the lower
horizontal edge of the plaster also forming a drip profile to enable water to fall away from the wall
below the plaster
Note 1 to entry: This section can also be fabricated from wire.
3.2.4
movement bead
corrosion resistant profiled section connected with a flexible plastic extrusion capable of a movement
within the range of ± 1,5 mm of the external render surface
Note 1 to entry: This section can also be made from steel wire.
3.2.5
corner aid/depth gauge bead
steel strip bead allowing exact thickness all over the wall section
Note 1 to entry: See Table 2.
3.3 Metal beads, functional features:
3.3.1
profiled face/edge
surface or edge of bead used to provide the feature or function
3.3.2
wing
area of metal strip joining the bead face or edge, usually expanded or perforated or welded wire used
for fixing and also key for plaster
3.3.3
open area
percentage of wing area perforated or expanded or percentage of opening between welded wires
3.3.4
plastic sheathing
plastic extrusion profiles designed to clip over exposed surfaces of beads for added protection against
corrosion
Note 1 to entry: See Table 2 for the geometry of some profiles.
prEN 13658-2:2017 (E)
4 Requirements
4.1 Fire behaviour
4.1.1 Reaction to fire
When the intended use of metal lath and beads is for situations in building construction works where
there is a risk of exposure to fire, metal lath and beads shall be classified A1 without the need of
1)
testing unless they have organic coatings or flexible middle parts.
Metal lath and beads for external rendering having an exposed surface containing organic material may
2)
be classified E without the need of testing .
For the purpose of classification in classes other than classes E and F, they shall be tested and classified
in accordance with EN 13501-1.
4.1.2 Fire resistance
Metal lath and beads can be used in walls and canopies and encasement systems providing fire ratings.
When required, the fire rating of the system shall be tested to EN 1364-1, EN 1364-2, EN 1365-1,
EN 1365-3 and EN 1365-4 as appropriate and classified to EN 13501-2.
4.2 Requirements for lath
4.2.1 Material
Lath shall be manufactured from the materials and finishes shown in Table 3. The corrosion resistant
selected material and finish shall provide a satisfactory level of protection against corrosion under
conditions of intended use, i.e. regional requirements.
4.2.2 Description
a) Expanded lath, ribbed lath and wire lath or mesh shall be formed to provide the functional
requirements of stiffness to span between supports or fixings and have aperture sizes to provide an
efficient keying matrix for the plaster. Typical products meeting these requirements are given in
Tables 4 and 5 and in Figures 3, 4, 5, 6 and 7;
b) stainless steel claylath is produced in open, half open and closed versions. In half open and closed
claylath, the apertures between the crosses may be closed with fired clay. Fired clay is itself an
efficient keying matrix (see Table 6 and Figure 8). At least 60 % of the surface area shall be covered
with clay.
4.2.3 Dimensions
4.2.3.1 Nominal thickness and diameter
a) For expanded lath, ribbed lath, wire lath and mesh, the thickness/diameter shall be as given in
Tables 4 and 5. The tolerances shall be those specified in EN 10143, EN 10218-2 and EN 10264-4;
b) for stainless steel claylath, the nominal sizes of the wire for production (before firing) shall be
0,7 mm and 0,9 mm; the tolerances shall be those specified in EN 10258 for stainless steel wire.

1) According to Commission Decision 96/603/EC as amended.
2) According to Commission Delegated Regulation (EU) No 1293/2014.
prEN 13658-2:2017 (E)
4.2.3.2 Length and width
a) For expanded lath, ribbed lath and wire lath, the nominal length and width of lath shall be declared
by the manufacturer. Tolerances shall be ± 1 % for length and ± 15 mm for width;
b) for stainless steel claylath, the nominal length and width of lath shall be declared by the
manufacturer; tolerance shall be ± 2 %.
4.2.3.3 Mesh type and size dimensions
a) For expanded flat lath, when measured as illustrated in Figure 3, the aperture shall be at least
13 mm in the LWM (long way mesh) direction and at least 5 mm in the SWM (short way mesh)
direction.
b) Expanded corrugated lath is produced from flat lath; the minimum height of the corrugated ribs
shall be 5 mm.
c) Expanded normal ribbed and expanded mini ribbed lath are formed with a rib on each longitudinal
edge and with ribs spaced at maximum intervals of 110 mm. For expanded ribbed lath, the
minimum height of the ribs shall be 7 mm and for expanded mini ribbed lath between 4 mm and
7 mm. The aperture sizes in the LWM and the SWM directions as specified by the manufacturer
shall correspond to Figure 4.
NOTE The dimensions are for “clear aperture” not centre to centre of strands.
4.2.3.4 Standard paperbacked wire lath
The wires shall have a minimum nominal equivalent diameter of 1,4 mm. For further details see 3.1.5
(see Figure 5 and Table 5).
4.2.3.5 Reinforced paperbacked wire lath
Same as 4.2.3.4, but the reinforcing wires shall have a minimum nominal equivalent wire diameter of
2,8 mm spaced at distances not greater than 150 mm. The moment of inertia in the direction where
increased stiffness is required shall be at least 10 mm .
4.2.3.6 High ripped paperbacked wire lath
Same as 4.2.3.4 but the reinforcing wires shall have a minimum nominal equivalent wire diameter of
3,9 mm spaced at distances not greater than 150 mm. The moment of inertia in the direction where
increased stiffness is required shall be at least 30 mm .
4.2.3.7 Damp proof paperbacked wire lath
Same as 4.2.3.5 with a bituminous paper bonded to the back of the cardboard sheet.
4.2.3.8 Stainless steel claylath
For requirements see Table 6 and Figure 8. The figure shows the open type. In half open and closed
claylath the apertures between the crosses may be closed with fired clay.
4.2.3.9 Welded wire mesh
For requirements see Table 5 and Figure 7.
prEN 13658-2:2017 (E)
4.3 Requirements for beads
4.3.1 Material
Beads shall be manufactured from hot-dip coated steel sheet or strip conforming to EN 10346,
Austenitic stainless steel sheet or strip to EN 10088-1and EN 10088-2, aluminium sheet or strip to
EN 573-3, organic coated galvanized steel sheet or strip to EN 10169-1 or subsequently organic coated,
galvanized steel sheet or strip to EN 10346. Alternatively, beads can be manufactured from galvanized
wire to EN 10244-1 and EN 10244-2 (class A), austenitic stainless wire to EN 10088-1, EN 10088-3 and
EN 10088-5 or zinc alloys to EN 988.
The material or coatings shall be that defined in this standard (see Table 3) or to an equivalent level to
prevent corrosion at normal conditions of use (i.e. regional requirements, marine environment, reaction
between gypsum and some stainless steels).
4.3.2 Description
Beads shall be formed to provide functional or featured profiles. They shall be free from kinks or
deformations which would detract from their function. The beads may incorporate a variety of profiles
with one or more wings depending upon their function. The wings shall be expanded or perforated or
welded wire to facilitate fixing using mechanical or plaster fixing methods.
4.3.3 Dimensions
4.3.3.1 Thickness or diameter
a) Metal strip: Beads formed from metal strip shall have a minimum thickness of 0,5 mm for hot-dip
coated steel, or subsequently organic coated, galvanized steel (sheet thickness to be measured
before coating). The minimum thickness for aluminium strip shall be 0,4 mm and for stainless steel
strip 0,3 mm.
b) Fabricated wire beads: Beads fabricated from galvanized or stainless steel wire shall have a
minimum nominal equivalent diameter of 1,4 mm.
c) Precoated hot-dip coated steel strip, organic coated: The thickness of the coating shall be specified
by the manufacturer.
d) Subsequently organic coated, galvanized steel strip: The thickness of the additional organic coating
shall not be less than 20 µm and shall be specified by the manufacturer.
4.3.3.2 Length
The nominal length of the bead shall be declared by the manufacturer. The tolerances shall be for:
— perforated or expanded metal strip: ± 10 mm;
— galvanized or stainless steel wire: ± 20 mm.
4.3.3.3 Straightness
The beads shall be straight to an accuracy which allows for the following maximum deviations from the
flat surface when measured as described in 5.2.4 and shown in Figure 1:
L
— for angle beads (1)
prEN 13658-2:2017 (E)
L
— for stop and featured beads (2)
where
L is the length.
4.3.3.4 Profile dimensions
The profile dimensions and angles shall be as shown in Table 2 and measured as described in 5.2.5.
4.3.3.5 Wing width
The minimum width of wings is given in Table 2.
4.3.3.6 Wing open area
The open area of each wing shall be > 10 % for depth gauge beads, > 30 % for perforated strip, > 50 %
for expanded strip, > 80 % for welded mesh.
4.3.3.7 Movement bead
The manufacturer shall declare that the bead provides movement of ± 1,5 mm without damage.
4.3.3.8 Expansion bead
The manufacturer shall declare that the bead provides differential movement more than ± 1,5 mm
without damage.
4.4 Dangerous substances
Where required the release of dangerous substances shall be declared.
5 Testing and sampling
5.1 Dimensional measurements of lath
5.1.1 General
The test methods necessary to demonstrate the compliance of the product with the technical
requirements shall be as given below. Sampling shall consist of at least five full size specimens chosen at
random.
5.1.2 Thickness or diameter
5.1.2.1 Principle
The dimension shall be measured directly.
5.1.2.2 Apparatus
5.1.2.2.1 Micrometer permitting readings to 0,01 mm.
5.1.2.3 Procedure
Measure the distance between the two faces at three separate positions per specimen. For wire
measure the diameter at three different positions.
Measurement shall be carried out on a representative surface area which is free from formed surfaces
and any slight distortions from cutting.
prEN 13658-2:2017 (E)
5.1.2.4 Expression of results
Record three measurements of thickness or diameter and calculate the arithmetical average for each
specimen. This shall be conducted on five specimens, all of which shall meet the requirements of 4.2.3.1.
5.1.3 Length and width
5.1.3.1 Principle
The dimension shall be measured directly.
5.1.3.2 Apparatus
5.1.3.2.1 Flat surface.
5.1.3.2.2 Metal rule or tape graduated in millimetres permitting readings to 1,0 mm.
5.1.3.3 Procedure
Place the specimen on the flat surface and measure the length and width. Make measurements at three
separate positions per specimen.
5.1.3.4 Expression of results
Record three measurements of length and width and calculate the arithmetical average for each
specimen. This shall be conducted on five specimens, all of which shall meet the requirements of 4.2.3.2.
5.1.4 Coating thickness of lath and beads
5.1.4.1 Principle
The thickness of the coating shall be measured and compared to the requirements.
The coating thickness may be measured either by
a) using electro or magnetic probe;
or
b) by the stripping method (reference method).
NOTE The reference method refers to the method to be used in the case of different results between the two
methods. Method b) is a large-scale method qualified for laboratory measurements. For measurements at random
during manufacturing or on site, method a) is preferred.
5.1.4.2 Apparatus
5.1.4.2.1 Electro or magnetic probe measuring equipment; or
5.1.4.2.2 Micrometer permitting readings to 0,01 mm; and
5.1.4.2.3 Stripping reagent 1) or 2):
1) dissolve about 3,2 g of antimonous chloride (SbCl ) or 2 g of antimonous oxide (Sb O ) in 500 ml
3 2 3
of concentrated hydrochloric acid (specific gravity of 1,19). Dilute the solution with distilled water
to 1 000 ml.
prEN 13658-2:2017 (E)
2) according to EN ISO 1460: dissolve 3,5 hexamethylentetrmine in 550 g concentrated hydrochlorid
acid (r = 1,19 g/ml). Dilute this solution with distilled water to 1 000 ml.
5.1.4.3 Procedure
Method A: Operate the electro or magnetic probe equipment to give direct readings of coating
thickness
or
Method B: Measure the thickness a of the product including the coating.
Immerse the sample completely in the stripping reagent at room temperature and leave until the
coating has completely dissolved. The end of the dissolution process can be recognized by the cessation
of the originally brisk evolution of hydrogen. Rinse the sample in running water and, if necessary, brush
to remove any loose substance which may be adhering to the surface. Dip in alcohol and quickly dry.
Measure the thickness b of the base metal. Measure the thickness a of the product (including the
coating). Subtract thickness b (without coating) from the value a. This result has to be divided by 2
because the coating is on both sides of the product.
The coating thickness is given by:
ab−
(3)
5.1.4.4 Expression of results
Make three measurements of coating thickness and calculate the arithmetical average on each
specimen. All specimens shall comply with the requirements to EN 10143 and EN 10218-2 for
galvanized materials and with 4.3.3.1 for additional coating.
Lacquer strips shall comply with the manufacturer’s specification on coating thickness.
5.2 Dimensional measurements of beads
5.2.1 General
The test methods necessary to demonstrate the product compliance with the technical requirements
are given below. Sampling shall consist of at least five full size specimens chosen at random.
5.2.2 Thickness or diameter
See 5.1.2 except 5.1.2.4.
Expression of results: Record three measurements of thickness or diameter and calculate the
arithmetical average for each specimen. This shall be conducted on all five specimens which shall meet
the requirements to 4.3.3.1.
5.2.3 Length
See 5.1.3 except 5.1.3.4.
Expression of results: Record the measurements of length of each of the five specimens. All specimens
shall comply with the requirements to 4.3.3.1.
5.2.4 Straightness
5.2.4.1 Principle
The straightness of the specimen shall be measured and compared with the tolerances.
prEN 13658-2:2017 (E)
5.2.4.2 Apparatus
5.2.4.2.1 Flat surface.
5.2.4.2.2 Slide calliper graduated in millimetres, permitting readings to 0,5 mm.
5.2.4.3 Procedure
Place the specimen on the flat surface and measure the deviation from the plane of the flat surface (see
Figure 1).
5.2.4.4 Expression of results
Record the results of the five specimens. All specimens shall comply with the requirements to 4.3.3.3.
5.2.5 Profile dimensions
5.2.5.1 Principle
The accuracy of the profile shall be measured taking into account angles and dimensions.
5.2.5.2 Apparatus
5.2.5.2.1 Protractor.
5.2.5.2.2 Slide calliper graduated in millimetres, permitting readings to 0,1 mm.
5.2.5.3 Procedure
Measure the angles and the dimensions of the profiles at a distance of at least 200 mm from the end of
the profile and compare these with the specifications given in Table 2.
5.2.5.4 Expression of results
Record the results of the five specimens. All specimens shall comply with the requirements to 4.3.3.4.
5.2.6 Coating thickness
Measure as described in 5.1.4.
6 Assessment and verification of constancy of performance — AVCP
6.1 General
The compliance of metal lath and beads for external rendering with the requirements of this standard
and with the performances declared by the manufacturer in the DoP shall be demonstrated by:
— determination of the product type
— factory production control by the manufacturer, including product assessment.
The manufacturer shall always retain the overall control and shall have the necessary means to take
responsibility for the conformity of the product with its declared performance(s).
prEN 13658-2:2017 (E)
6.2 Type testing
6.2.1 General
All performances related to characteristics included in this standard shall be determined when the
manufacturer intends to declare the respective performances 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 or products of similar design, construction and functionality, such
that the results are applicable to the product in question.
NOTE Same AVCP system means testing by an independent third party (applies only for products covered by
system 1+, 1 and 3), under the responsibility of a notified product certification body (applies only for products
covered by system 1+ and 1).
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.
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 characteristics included in
the standard for which the manufacturer declares the performance:
— at the beginning of the production of a new or modified metal lath and beads for external rendering
(unless a member of the 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 characteristic(s), whenever a change occurs in the metal lath
and beads for external rendering 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 characteristics.
Where components are used whose characteristics have already been determined, by the component
manufacturer, on the basis of assessment methods of other product standards, these characteristics
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 performances declared in the DoP, although this does not
replace the responsibility on the metal lath and beads for external rendering manufacturer to ensure
that the metal lath and beads for external rendering 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 metal lath and beads for external rendering to be tested/assessed shall be in
accordance with Table 1.
prEN 13658-2:2017 (E)
Table 1 — Number of samples to be tested and compliance criteria
Assessment Compliance
Characteristic Requirement No. of samples
method criteria
Reaction to fire
4.1.1 4.1.1 see EN 13501–1 4.1.1
(for exposed situations)
a a a
Dangerous substances
4.4 4.4 4.4
a
No test method available at the moment. The number of samples and the compliance criteria shall be in
accordance to the corresponding test method.
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 metal
lath and beads for external rendering 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 (e.g. dimensions) and with raw materials, constituents and manufacturing methods of the same
kind, provided that:
a) the results are known to be valid for products with the same essential characteristics relevant for
the product performance;
b) in addition to any information essential for confirming that the product has such same
performances related to specific essential characteristics, the other party who has carried out the
3)
determination of the product type concerned or has had it carried out, has expressly accepted to
transmit to the manufacturer the results and the test report to be used for the latter’s product type
determination, as well as information regarding production facilities and the production control
process that can be taken into account for FPC;
c) the manufacturer using other party results accepts to remain responsible for the product having
the declared performances and he also:
1) ensures that the product has the same characteristics relevant for performance as the one that
has been subjected to the determination of the product type, and that there are no significant
differences with regard to production facilities and the production control process compared
to that used for the product that was subjected to the determination of the product type; and
2) keeps available a copy of the determination of the product type report that also contains the
information needed for verifying that the product is manufactured according to the same
design and with raw materials, constituents and manufacturing methods of the same kind.

3) The formulation of such an agreement can be done by licence, contract, or any other type of written consent.
prEN 13658-2:2017 (E)
6.2.5 Cascading determination of the product type results
For some construction products, there are companies (often called “system houses”) which supply or
4)
ensure the supply of, on the basis of an agreement, some or all of the components (e.g. in case of
5)
windows: profiles, gaskets, weather strips) to an assembler who then manufactures the finished
product (referred to below as the “assembler”) in his factory.
Provided that the activities for which such a system house is legally established include
manufacturing/assembling of products as the assembled one, the system house may take the
responsibility for the determination of the product type regarding one or several essential
characteristics of an end product which is subsequently manufactured and/or assembled by other firms
in their own factory.
When doing so, the system house shall submit an “assembled product” using components manufactured
by it or by others, to the determination of the product type and then make the determination of the
product type report available to the assemblers, i.e. the actual manufacturer of the product placed on
the market.
To take into account such a situation, the concept of cascading determination of the product type might
be taken into consideration in the technical specification, provided that this concerns characteristics for
which either a notified product certification body or a notified test laboratory intervene, as presented
below.
The determination of the product type report that the system house has obtained with regard to tests
carried out by a notified body, and which is supplied to the assemblers, may be used for the regulatory
marking purposes without the assembler having to involve again a notified body to undertake the
determination of the product type of the essential characteristic(s) that were already tested, provi
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