Wood is hygroscopic, which means its moisture content (MC) will fluctuate based on the relative humidity (RH) of the surrounding air. As humidity increases, the MC increases, and the wood expands, and as the humidity decreases, MC decreases, and the wood shrinks. This relationship is referred to as Equilibrium Moisture Content (EMC). Wood will expand on warmer days and contract on colder days.
In a sense the wood breathes just like us. Wood will also adjust to the moisture content of your home and its surroundings. You may notice your slab furniture piece move ever so slightly or even develop small cracks or dips, especially in very dry climates. THIS IS NORMAL. Slab furniture cannot be compared to other solid wood furniture pieces. Organic wood furniture will have movement during its life; this is the beauty of natural wood slab furniture.