Cross-laminated timber (CLT) as a prime example of an innovative product within the field of civil engineering has over the recent years attracted attention of the construction industry around the world. Timber structural systems however are more sensitive to vibrations than conventional concrete based structures. Therefore, a thorough understanding of dynamic characteristics of CLT and accurate predictive models can enhance potential of wooden structures in the construction industry. This work presents a numerical and an experimental modal analysis of a series of CLT beams, cut out from a larger CLT plate, composed of two covering layers of Norway spruce and a mid-layer of Scots pine. The experimental results are utilised for a sensitivity analysis with respect to the mechanical properties of CLT.