We present the basics of dendrochronological dating together with examples of successful, less successful, and unsuccessful dating of roof constructions and ceilings in Slovenia. Each analysis starts with coring, sample preparation, and wood determination. It is not always possible to date a sample, because we are faced with many obstacles as problematic growth patterns, unsuitable tree species, too few tree-rings, or sometimes the high value of the analysed object which may not be damaged by sampling. The larch, spruce, silver fir and oak are most frequently investigated. Dating of larch and silver fir is often possible but we face many problem s with the spruce and oak.
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