This paper represents a study concerning the effect of fire retardant treatment «FUKAM» on the fire hazard characteristics of pine, aspen and larch. The front of model ground fire was investigated to estimate its effect on the surface of wood samples. Infrared thermography was used as a diagnostic method. The surface temperature distribution was obtained for the test wood samples after exposure to a fire front that was modeled using pine needles. The probability of ignition was estimated for the chosen experimental parameters for each kind of wood. The fire hazard characteristics of wood after fire retardant treatment showed a significant reduction in the surface temperature and the resistance to fire for the chosen parameters of the experiment compared to the same untreated samples.complete pyrolysis occur at a rate that is low to create a combustible concentration. In addition, as is known, for stable combustion the solid material should obtain the amount of heat that provides a continuous supply of the sufficient amount of gaseous combustible substances in the combustion zone [17].The use of fire retardant treatment (for example a fire retardant «FUKAM») certainly increases the resistance of wood to fire, which is confirmed by the data on the sample surface temperature after exposure to model combustion.