In the last ten years, the huge amount of wooden buildings houses and objects of Zagreb’s cultural heritage were restored with fine workmanship. As the wood was one of the most used construction materials, the scientists and specialists from the Faculty of Forestry also took part in those restoration and reconstruction processes. The aim of this article is to inform and advice the restorers on the correct use of different wood species and the proper use of new and/or traditional preservatives and methods of preservation in the processes of the restoration and reconstruction.