BS/EN 16724-2015 pdf download.Thermal insulation products for building applications Instructions for mounting and fixing for determination of the reaction to fire testing of external thermal Insulation composite systems (ETICS).
5.4 Testing according to EN 13823 (Single burning item — SBI)
5.4.1 General
This test method is relevant for ETICS which shall be classified into reaction to fire classes according to EN 13501-1 (A2, B, CorD, or in some cases class Al).
5.4.2 Test specimen
By this test procedure a specific kit shall be tested. The kit shall be fixed to a substrate representing the one to which the kits of a design ETICS are intended to be fixed in the end use application (reference is made to EN 13238). The fixing shall be made using either an adhesive used in the end use application or. in case of purely mechanical fixing, by using the mechanical fixing devices used in the end use application. When only adhesives are used for preparing the test specimen, the test result is valid also for the use of mechanical fixings. In case a purely mechanical fixing with plastic anchors is used, the test result is also valid for the use of metallic anchors.
If the thickness of the test specimen, including a standard substrate according to EN 13238 is 180 mm to 200 mm, the test result is also valid for greater thicknesses of the insulation product that has been tested.
The test specimen consists of a corner construction using the kit. The components shall be fixed to a substrate representing the end-use substrate (in accordance with EN 13238). All edges shall be covered with the rendering system except the bottom edge and the top of the specimen (see Figure 1). After preparation, the test specimens shall be conditioned according to EN 13238.
The test specimen shall be prepared with the reinforcement that is intended to be used in end use application.
At the long wing of the SBI specimen a vertical joint of the reinforcement shall be installed. At a distance of 150 mm to 250 mm from the inner corner the two layers of reinforcement shall overlap (see Figure 1).
NOTE An aluminium foil is sometimes used as protection on the bottom edge of the test specimen.
5.4.3 Base coat and finishing coat
When testing base coats or finishing coats the following rules shall apply:
a) Base coats and the finishing coats shall be grouped according to the binder type in accordance with the principles specilied in 5.1 and below.
b) If the organic content of both the base coat and the finishing coat is ≤ 5 %, the lowest declared layer thicknesses shall be used for preparing all three test specimens.
If the worst case is known on the basis of existing test results, only this configuration needs to be tested.
c) For the base Coats and/or the finishing coats having an organic content higher than 5 % the worst case has to be determined out of two configurations. lithe worst case can be extrapolated on the basis of historical data, only this configuration needs to be tested. Otherwise two configurations have to be prepared as follows:
1) one test specimen with lowest declared thicknesses of the layer of the base coat and finishing coat
2) one test specimen with highest declared thicknesses of the layer of the base coat and finishing coat
Both test specimens have to be tested in order to identify the worst case. After that two further tests shall be performed with the worst case configuration.
BS EN 16724:2015
EN 16724:2015 (E)
dj The test result is also valid tar any nnishing coat anaor nase coat witn a lower organic content than the tested base coat and finishing coat.
5.4.4 ReInforcement
The product with the lowest weight per unit area shall be used for preparing the test specimens.
The test results with an overlap of the reinforcement of 10cm are valid for overlapping of 10 cm or more.
The test results are also valid for all reinforcements of the same material with equal or higher weights per unit areas than that of the tested product.
5.4.5 Thermal Insulation products.BS/EN 16724-2015 pdf download.