Abstract: Active galactic nuclei (AGN) are powered by accreting supermassive black holes, surrounded by a torus of obscuring material. According to the unification theory, this torus is uniform and obscures certain lines of sight. However, more recent observations have brought us to consider a slightly more complex picture: both infrared observations and X-ray eclipsing events suggest the torus is likely to be a patchy structure. Here, we present the analysis of 14 nearby Seyfert 2 galaxies. Our sample consists of a total of 85 X-ray observations at different epochs. We take advantage of NuSTAR's unique energy coverage above 10 keV to accurately constrain parameters such as the torus average column density and covering factor, and therefore measure with high accuracy the torus line-of-sight column density in each epoch. Our analysis shows line-of-sight column density variability for 9/14 sources, as well as large differences between line-of-sight column densities and average torus column densities for variable sources. This suggests that the material responsible for obscuration and reflection might not be the same, pointing toward added complexities in the torus structure.