The development of new technology allows us to produce products that are environmentally friendly and comparable or even better than materials based on raw materials from non-renewable sources. Tannin foam is one such product, which is made mainly from natural and renewable sources. In our study we studied the properties of tannin foams and made a composite with a tannin foam core. We prepared two different compositions of tannin foams and compared their density and compressive strength. We found that by adding different components to the composition of tannin foam, the properties of the tannin foam change. In the second phase of the study we selected the tannin foam which showed better properties, and made wood composites with a tannin foam core from it, using five different wood materials for the surface layer of the composite. The internal bond strength of the surface layer and the core of the manufactured wood composites was tested. We found that the highest internal bond strength was in composites where we used wood and OSB as a base, and the lowest in composites made of particleboard and plywood.