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Statistics show that the number of façade fires has been relatively large in the past few years. The surprising fact is that even in modern high-rise buildings, which are covered with non-flammable façade elements and equipped with high-quality fire-fighting equipment, we have recorded a relatively large number of fires spreading along the façades. They do not have disastrous consequences but they damage buildings, endanger people during evacuation and make the situation more difficult for fire-fighters. Many scientific studies refer to cladding and its functions. Besides its aesthetic function, it serves as thermal, acoustic as well as fire insulation. Building façades are threatened in three ways – by a direct flame from a burning element in front of the building itself, by a fire from the interior of the building, or by a heat radiation source coming from a neighboring building on fire. The choice of material and its application onto the building is important for the fire safety of façades. A wooden spruce façade containing two types of finger joints has been chosen for the experiment and the effect of the joint type using the selected evaluation criteria has been observed. Parts of the façade have been used for the experiment. Samples of 20 x 60 x 250 mm have been made, 15 pieces per each section. A thermal radiator of 1000 W, acted as the heat source, simulating the conditions of thermal radiation coming from a neighboring building. Weight loss and burning rate are the evaluation criteria. The experiment results are represented graphically. The experiment shows that the direction of the finger joints has an impact on the evaluation criteria as well as on the penetration of radiation heat into other parts of the structure thus increasing the probability of its ignition from the radiation heat source.

International Seminar on Fire and Explosion Hazards (9; 2019; Saint Petersburg, Russia). Proceedings of the Ninth International Seminar on Fire and Explosion Hazards [Электронный ресурс]: 21-26 April 2019, Saint Petersburg, Russia. Vol. 2 / Peter the Great St. Petersburg Polytechnic University, Autonomous Non-Profit Organization "Fire and Explosion Safety", Gefest Holding Ltd ; [edited by A. Snegirev [et al.]. — Электрон. текстовые дан. (1 файл : 98,7 Мб). — Saint Petersburg, 2019. — Загл. с титул. экрана. — Свободный доступ из сети Интернет (чтение, печать, копирование). — Adobe Acrobat Reader 7.0. — <URL:http://elib.spbstu.ru/dl/2/k19-97.pdf>. — <URL:http://doi.org/10.18720/SPBPU/2/k19-97>.