| Summary: In this thesis the effects of 15-month natural weathering test (Uzungol plateau, Surmene coastal and Hidirnebi Plateau) and 360-hour artificial weathering test in a laboratory environment on wooden materials were studied. Within the scope of the thesis, samples of Oriental Beech (Fagus orientalis L.), Scotch Pine (Pinus sylvestris L.) and Oriental Spruce (Picea orientalis L.) with 8 different preservative treatments (chemical treatment, thermal treatment, coating, chemical treatment + coating and thermal treatment + coating) were subjected to weathering tests. The traditional thermal treatment method ,Micronized Copper Quat (MCQ) as the new generation wood preservative and Acrylic resin (UVA-acrylic) with ultraviolet light (UV) absorbents as the new generation coating were used in the protective treatments. Changes in the color and roughness values, surface chemistry, visual-macroscopic alterations and changes in mechanical properties were studied and compared on wooden samples with and without surface coatings subjected to natural and artificial weathering tests. As a result; MCQ impregnation and coating with acrylic resin containing UV absorbent applied to Oriental beech and Scotch pine, and thermal treatment followed by acrylic resin containing UV absorbance applied to Oriental spruce increased the visual, physical, chemical and mechanical performance of wooden samples under outdoor conditions. Under outdoor conditions, the best protection of Oriental spruce timber, which is known that refractory specimen is provided by thermal treatment without application of coating, while the best protection of Oriental beech and Scotch pine timber is provided by MCQ impregnation. Thus, several materials and methods were identified to provide the best protection for Oriental beech, Scotch pine and Oriental spruce, which abundantly grow in the Eastern Black Sea Region, when used in the wooden mountain houses. Additionally, statistical analysis method was used to identify the artificial decay simulation technique variables for the Surmene pilot region by utilizing the values of surface color and roughness variables and the alteration values of pressure resistance parallel to fibers as measured from the surfaces of samples subjected to weathering tests in the Surmene coastal region.
Key Words: Weathering test, Thermal treatment, Micronized copper quat, UV absorbance, Acrylic resin, Chemical analysis, Mechanical resistance.
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