There is no definitive answer to this question, as there are both pros and cons to both vertical and horizontal storage.
On the one hand, storing surfboards vertically may be more space-efficient and can help prevent damage from dings and scratches. However, storing surfboards horizontally may provide better airflow and prevent warping over time.
Ultimately, the best solution will depend on your specific needs and preferences. So whether you decide to store your surfboards vertically or horizontally, just be sure to take good care of them to keep them in peak condition for years to come!