Yes, it is generally recommended to leave a small gap between drywall and the floor during installation. This gap serves a few important purposes:
Accommodating for movement: Buildings can experience slight movements and settling over time due to changes in temperature and humidity, which can cause the floor to shift. Leaving a small gap prevents the drywall from being affected by these movements, reducing the risk of cracks or damage.
Expansion and contraction: Drywall, like any building material, can expand and contract with changes in temperature and humidity. By leaving a gap, you allow the drywall to adjust its size without buckling or warping.
Moisture protection: Keeping the drywall slightly elevated from the floor helps to prevent moisture from wicking up from the floor, which could lead to water damage and mold growth.
Typically, the gap between the drywall and the floor should be around 1/4 inch (approximately 6 mm). This gap can be concealed later by baseboards or other trim during the finishing stages of construction. It's essential to ensure a uniform gap along the entire length of the wall to maintain a professional appearance.