OVERVIEW
EN 11925-2 is a testing protocol used to determine the ignitability of a product by directly exposing a vertically oriented sample to a small flame. This “single burn item” test is one of the tests used as part of the Euroclass building product classification system which was introduced to harmonise standards across the EU.
A Single Burning Item test (SBI) is a method of testing that is used to determine the reaction to fire behaviour when a building product it is subject to thermal attack by a single heat source. The product being tested is mounted on a trolley and positioned in a frame beneath an exhaust system. As the item is exposed to flame, the exhaust system collects combustion gases for analysis and the amount of smoke produced is measured. The flame propagation and occurrence of burning particles and droplets are also identified in the specimen’s burning behaviour.
Zenova commissioned Warrington Fire to test its Zenova IR thermal insulation render to the BS EN ISO 11925-2:2020 test standard.
DESCRIPTION OF TEST
A 9mm thick sheet of standard, untreated, plywood had a 5mm coat of Zenova IR thermal insulation render applied by trowel. Positioned vertically, the sheet was subjected to the SBI test, and the flame spread observed and measured. The rating achieved is dependent upon the amount of flame spread, which must not exceed 150mm.
TEST RESULTS
A flame spread of 90mm was observed, which concluded that Zenova IR thermal insulation render helps to reduce flame spread. The success of this test means Zenova IR thermal insulation render tested to the BS EN ISO 11925-2: 2020 standard, can be used in construction, on a variety of substrates, to improve fire safety.