As solid timber is a natural material it is subject to movement and will contract and expand depending on the environment. The expansion and contraction can  cause small cracks to appear, particularly in larger cross sections of solid timber such as table tops, which use 52 mm input material. This movement is influenced by many factors including exposure to sunlight, temperature variation, and humidity levels. Heating and air conditioning can all impact these changes.  These variations can also result in small misalignments in door and drawer fronts.Unlike furniture made from composite material and veneers it is nearly impossible to totally avoid all surface cracking and movement due to the nature of the solid timber.