The project is based on the development of an innovative system of protection of wooden building elements against biocorrosion based on own patents PL238809 "Method of protection of wooden building elements, especially against fungi" and PL230656 "Method of protection of building partitions against biocorrosion". The system assumes the protection of only critical points of the wooden structure, i.e. at the contact of wood with other building materials, including bricks, concrete, etc. All wooden construction elements will be free of chemicals. The area of protection of the surface will be reduced by about 90% compared to alternative solutions that assume full impregnation of wood with chemical protection agents. An element of the novelty is the synergy of action of an innovative impregnation containing silver ions and a system of barrier spacers with built-in zinc and copper electrodes to protect wooden elements at the contact with ceramic materials (e.g. brick roof truss). The preparation with silver ions - Ground Ag will be used to impregnate ceramic elements on which a galvanic spacer with built-in zinc and copper electrodes will be laid to form a three-electrode silver-zinc-copper electroplating system. The system creates 'smart' coatings or partitions with galvanic cells that become active only when the moisture of walls or wooden structural elements increases. The scientific basis of the technology proposed in the project is the subject of three publications, which were published by the Applicant in Scientific Reports: ‘Antiviral activity of galvanic microcells of zinc and copper contained within painted surfaces’ https://www.nature.com/articles/s41598-022-05330-8 , Three-electrode galvanic microcells as a new antimicrobial tool https://www.nature.com/articles/s41598-020-64410-9 and ‘Galvanic microcells as control agent of indoor microorganisms’ https://www.nature.com/articles/srep35847 ‘Smart’ system will provide antifungal protection only when wood moisture increases. The activity of linear galvanic cells in the system will be directly correlated with the moisture level of the substrate and air. The system combines the biocidal properties of copper, zinc and silver ions with physical methods of electromagnetic field interaction. Degradation of wooden construction materials by fungi – especially within the roof truss. Wood is a natural organic material and as such can decompose under the influence of biological factors, especially at the points of contact of wood with concrete, brick or other mineral substrate. Environmental pollution by wood preservatives – in recent years, there have been concerns that chemicals such as phenols, azoles, etc. may enter the surrounding soil or aquatic ecosystems from wood. In addition, fungi can become resistant to biocides, this can be compared to resistance to antibiotics, after some time, agents based on organic biocides lose their effectiveness. In the 21st century, the wood protection sector is facing a huge challenge. New methods are being sought to protect wooden structures that will reduce environmental pressures and that will be adapted to the tightening regulations on chemical products. Environmentally friendly and effective wood protection measures will be desirable on the market. On the basis of preliminary market research, it has been established that the demand for ecological wood protection products and the use of wood as a building material will increase in the coming years. This technology will be an extension of the well-established range of paints offered by the Applicant - GALVI and Grunt Ag for antifungal protection of walls and ceilings. Work on the technology being the subject of this project began in response to direct inquiries from current customers about innovative wood protection technology. The new product will strengthen the Applicant's position on the protective coatings market