How should I properly install a subfloor using screws or nails?

To properly install a subfloor using screws or nails, first ensure the subfloor panels are properly aligned and supported. Use screws for a stronger and more secure hold, placing them every 6-8 inches along the edges and every 12 inches in the field. If using nails, drive them at a slight angle to prevent splitting, spacing them every 6-8 inches along the edges and every 12 inches in the field. Be sure to countersink the fasteners to ensure a flat surface.