The diploma thesis is focused on the evaluation of selected deciduous and coniferous trees for the needs of fire protection. The aim of the work is an experimental comparison of the thermal resistance of selected species of deciduous and coniferous trees, specifically oak, spruce, fir and pine, using standard and non-standard test methods. As a standard test method, we chose the flammability test, which determines the flammability of products when exposed to a small directed flame. As a non-standard test method, we used the radiant heat source test used in the combustion model tests. The main evaluation criteria of these methods, which we also used for the evaluation of these trees, are: in the flammability test - flame propagation over vertically oriented samples and in the radiant heat test - weight loss and ignition time. Based on the evaluation of the results of the mentioned test methods, we can state that in the tested samples of selected tree species there were no significant differences in terms of weight loss or in terms of ignition time. Also in the flammability test there were no significant differences and all wood species met the required classification criteria.