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GNB-CPR

SH02

Guidance from the Group of Notified Bodiesfor the Construction Products Regulation

305/2011/EU

NB-CPR/SH02/13/097

Issued: 21 June 2013

APPROVED GUIDANCE

GNB-CPR posit ion paper from SH02 - EN ISO 11925-2:2010

Clarification of how to test the ignitability of multilayered productssubjected to a direct single-flame source

General scope, limi tations and aim of th is guidance for notif ied bodies

The Construction Products Regulation (CPR) is based on the use of harmonised technicalspecifications, and these often require the involvement of a conformity assessment body todemonstrate compliance. Such bodies must be designated by the Member States as notifiedbodies (NBs). CPR Articles 43(11) and 55 require the formation of a group of notified bodies, andthat NBs should participate in its work. Article 43(11) states that the notified body shall apply asgeneral guidance the administrative decisions and documents produced as a work result of thatgroup. The GNB-CPR is the group referred to by Article 43(11).

The Group of Notified Bodies for the Construction Products Regulation (GNB-CPR) comprises anAdvisory Group (AG) and subordinate horizontal and vertical sector groups. SH02 is the horizontalsector group for Fire. One of the tasks of the SGs is to prepare position papers, such as this one,to assist in the assessment of construction products. Position papers must also be approved by

AG.

This position paper contains guidance for notified bodies (NBs) involved in the assessment andverification of constancy of performance of the ignitability of multilayered products tested bysubjecting them to a direct single flame in accordance with EN ISO 11925-2:2010. The purpose isto help NBs work equivalently and come to common judgments. This guidance contains informativematerial (which NBs should or may follow) and/or normative guidance (which NBs shall follow or atleast work equivalently to as circumstances demand).

The primary document for NBs is the edition of the relevant harmonised technical specification thatis currently cited in the Official Journal of the EU, or the European Technical Assessment, to whichthe manufacturer works. This guidance is thought necessary to provide clarity and completeness

for NBs so that they can work equivalently. It supplements and makes practical for NBstherelevant harmonised technical specifications. This position paper should notcontradict nor extendthe scope of the work and role of a NB, nor impose additional burdens on the manufacturer, beyondthose laid down in the CPR and the relevant harmonised technical specifications.

This guidance should be considered valid until the relevant standards are amended to include theguidance (as thought fit by the CEN/TC); or until guidance from the Commission, SCC or AG haschanged on relevant matters. Whereupon, the paper should be considered for withdrawal/revisionand be replaced by new guidance as necessary.

This position paper was approved by SH02 on 3 December 2013 and by Advisory Group on18 June 2013.

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1) For multilayered products with a total thicknessof more than 10 mm, an additional set of testsshall be carried out with the specimen turned around its vertical axis by 90 (see clause7.3.3.2.3 of EN ISO 11925-2).

2) Each layerin turn shall be impinged by the burner flame at the bottom edge of the layer and inthe middle of the width of this layer.

3) It is important that each layer shall be impinged by the burner flame. Very thin layers like thinlayers of adhesive shall be included in the testing. There is no restriction that layers with athickness of 10 mm or less can be excluded!

4) If a multilayered product includes layers which were created by melting two layers together(same material or different materials), these layers shall not be tested. These layers cannot beconsidered as layers of a multilayered product.

5) The number of single tests required is at least 2 per layer, extended to make a complete set of6 single tests on the layer which gave the worst test results.

6) If a multilayered product includes layers that are identical to each other in composition, densityand thickness, only one of these layers need be tested. If these layers are thin, they may onlybe considered identical if the layers adjacent to them are also identical.