What is the minimum spacing recommended for deck boards to allow for wood movement and drainage?

The recommended minimum spacing for deck boards is 1/8 inch. This spacing allows for proper wood movement due to changes in moisture content, which can cause the boards to expand and contract. Additionally, 1/8 inch spacing facilitates effective drainage, preventing water accumulation between the boards. This spacing helps to mitigate issues such as mold growth and wood rot, enhancing the longevity and safety of the deck. Maintaining adequate spaces between the boards is crucial in ensuring that water can flow freely and not get trapped, which can lead to deterioration over time.