There is a great demand for cement in the world, which causes great environmental problems. During the production of cement, a large amount of greenhouse gases is released into the atmosphere. In order to reduce greenhouse gas emissions, the European Union has committed to increasing the share of energy from renewable sources to at least 32% by 2030. Wood biomass is the main renewable energy source and therefore plays an important role in achieving this goal. By increasing the number of wood biomass energy sources, the amount of wood biomass ash increases. Wood biomass ash is disposed of to the greatest extent, which is not the most environmentally acceptable solution, therefore it is necessary to find more acceptable solutions for the disposal of ash produced by burning biomass. One of the possible solutions is the use of that ash as a component of concrete, where the amount of cement would be reduced, which was the subject of research in this work. Due to the insufficient research of this area, tests on this topic were conducted at the Department of Materials of the Faculty of Civil Engineering. The subject of my work is the processing of the results of capillary absorption, water absorption, water permeability, and frost and salt resistance tests that we conducted on samples of mixtures M5 and M11. The results were compared with the reference mixture M0 without wood biomass ash. The results indicate weaker durability properties than the reference mixture to a certain extent.