Proper spacing between deck boards is crucial for structural integrity and aesthetic appeal. Typically, a gap of 1/8″ to 3/16″ is recommended for pressure-treated lumber, composite, and PVC decking to accommodate expansion and contraction due to moisture fluctuations. Wider gaps, up to 1/4″, may be necessary in extremely humid climates or for specific wood species prone to significant expansion. A hidden fastener system or proper face-screwing techniques ensure a clean, professional finish.
Correct spacing prevents issues like buckling, warping, and rot by allowing for proper drainage and airflow. Historically, tighter spacing was common, but modern understanding of material science and best building practices emphasizes the importance of adequate ventilation to extend the life of a deck. This seemingly minor detail contributes significantly to the overall longevity, stability, and visual appeal of the structure.
