The aim of this thesis was to investigate the influence of weathering and biological factors on wooden roofs. We also wanted to find out how different protection techniques affect the durability and service life of shingles. In the thesis, we reviewed how wood roofing has evolved over the years and how each property of wood affects sustainability, and which properties we wanted to improve for better results. We were also interested in the differences that occur on the covered and exposed parts of the shingle. We began the experimental work by documenting and making samples of unprotected, thermally modified, and Silvanolin-protected spruce wood, from which we then determined the roughness, water repellency (contact angle), compressive strength, and amount of copper remaining in them. After processing and analyzing the data, we determined and confirmed that the protection of wooden roofs is necessary. After eight years of application, we did not find any differences in the quality of protection with Silvanolin and thermal modification. The differences are only in terms ofprice and colour, although these are often very important factors when choosing a product.
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