This report describes a series of tests of the new proposed method for assessing the performance of façades when exposed to flashover fires. The tests consider the large fire exposure and consists of the 8.5 meter high incombustible walls placed in a 90° angle towards each other. The report assesses reproducibility and the effect of moisture content, stick size, wind and depth of the combustion chamber.The data from the report will be publicly available at the project website for further use and scrutiny. https://www.ri.se/en/what-we-do/projects/finalisation-of-the-european-approach-to-assess-the-fire-performance-of-facades